chore: naikkan versi ke 1.0.13+20

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

.fvmrc

@@ -0,0 +1,3 @@
+{
+  "flutter": "3.41.9"
+}

.gitignore

@@ -32,6 +32,7 @@ migrate_working_dir/
 .pub-cache/
 .pub/
 /build/
+android/build/
 
 # Symbolication related
 app.*.symbols
@@ -43,3 +44,8 @@ app.*.map.json
 /android/app/debug
 /android/app/profile
 /android/app/release
+
+# FVM - versi Flutter dipin di .fvmrc (ikut di-commit), SDK-nya tidak
+
+# FVM Version Cache
+.fvm/

.vscode/launch.json

@@ -0,0 +1,17 @@
+{
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "name": "Dev",
+      "request": "launch",
+      "type": "dart",
+      "args": ["--dart-define=ENV=dev"]
+    },
+    {
+      "name": "Prod",
+      "request": "launch",
+      "type": "dart",
+      "args": ["--dart-define=ENV=prod"]
+    }
+  ]
+}

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+  "dart.flutterSdkPath": ".fvm/versions/3.41.9"
+}

README.md

@@ -23,21 +23,22 @@ Aplikasi Point of Sale (POS) berbasis Flutter untuk manajemen kasir restoran. Me
 
 ## Tech Stack
 
-| Kategori | Library |
+| Kategori             | Library                                                       |
-|---|---|
+| -------------------- | ------------------------------------------------------------- |
-| State Management | `flutter_bloc` + `bloc` |
+| Version Manager      | `fvm` — Flutter dipin di `.fvmrc`                             |
-| Dependency Injection | `get_it` + `injectable` |
+| State Management     | `flutter_bloc` + `bloc`                                       |
-| Navigation | `auto_route` |
+| Dependency Injection | `get_it` + `injectable`                                       |
-| HTTP Client | `dio` |
+| Navigation           | `auto_route`                                                  |
-| Local Database | `sqflite` |
+| HTTP Client          | `dio`                                                         |
-| Local Storage | `shared_preferences` |
+| Local Database       | `sqflite`                                                     |
-| Firebase | `firebase_core`, `firebase_crashlytics`, `firebase_messaging` |
+| Local Storage        | `shared_preferences`                                          |
-| Push Notification | `flutter_local_notifications` |
+| Firebase             | `firebase_core`, `firebase_crashlytics`, `firebase_messaging` |
-| Device Info | `device_info_plus`, `package_info_plus` |
+| Push Notification    | `flutter_local_notifications`                                 |
-| Code Generation | `freezed`, `json_serializable` |
+| Device Info          | `device_info_plus`, `package_info_plus`                       |
-| Printer | `print_bluetooth_thermal`, `flutter_esc_pos_network` |
+| Code Generation      | `freezed`, `json_serializable`                                |
-| Chart | `fl_chart` |
+| Printer              | `print_bluetooth_thermal`, `flutter_esc_pos_network`          |
-| Connectivity | `connectivity_plus` |
+| Chart                | `fl_chart`                                                    |
+| Connectivity         | `connectivity_plus`                                           |
 
 ---
 
@@ -78,11 +79,13 @@ feature/
 
 ### Prasyarat
 
-- Flutter SDK `^3.8.1`
+- **FVM** — project ini mengunci versi Flutter, jangan pakai Flutter global
-- Dart SDK `^3.8.1`
+- **Flutter 3.41.9** (Dart 3.11.5) — dipin di `.fvmrc`
 - Android SDK / Xcode (untuk iOS)
 - Firebase project yang sudah dikonfigurasi
 
+> **Kenapa versinya dikunci?** Stack code generation project ini (`freezed` 2.x, `build_runner` 2.5, `analyzer` 7.7.1) hanya paham bahasa Dart sampai 3.9. Flutter 3.44 ke atas membawa framework yang ditulis di bahasa 3.10+, dan `analyzer` 7.7.1 crash saat membacanya. Selama stack codegen belum dinaikkan, **Flutter 3.41.9 adalah versi terbaru yang masih bisa menjalankan `build_runner`.** Lihat [Troubleshooting](#troubleshooting).
+
 ### Instalasi
 
 ```bash
@@ -90,44 +93,120 @@ feature/
 git clone <repo-url>
 cd apskel-pos-flutter-v2
 
-# Install dependencies
+# Pasang FVM (sekali per mesin)
-flutter pub get
+dart pub global activate fvm
 
-# Generate kode (freezed, injectable, auto_route, json_serializable)
+# Ambil & pakai versi Flutter yang dipin di .fvmrc
-dart run build_runner build --delete-conflicting-outputs
+fvm install
+fvm use
 ```
 
+`dart pub global activate` memasang `fvm` ke folder bin milik pub yang **belum tentu ada di PATH**. Kalau muncul `fvm: command not found` / `The term 'fvm' is not recognized`, tambahkan foldernya sekali saja:
+
+```powershell
+# Windows PowerShell — permanen, buka terminal baru setelahnya
+[Environment]::SetEnvironmentVariable('Path', [Environment]::GetEnvironmentVariable('Path','User') + ";$env:LOCALAPPDATA\Pub\Cache\bin", 'User')
+
+# Untuk terminal yang sedang terbuka
+$env:Path += ";$env:LOCALAPPDATA\Pub\Cache\bin"
+```
+
+```bash
+# macOS / Linux — tambahkan ke ~/.zshrc atau ~/.bashrc
+export PATH="$PATH:$HOME/.pub-cache/bin"
+```
+
+Setelah `fvm` bisa dipanggil, lanjutkan:
+
+```bash
+# Install dependencies
+fvm flutter pub get
+
+# Generate kode
+fvm dart run build_runner build
+```
+
+> Semua perintah Flutter/Dart di project ini **harus diawali `fvm`**. `flutter run` tanpa `fvm` memakai Flutter global dan hasilnya bisa berbeda.
+
 ### Menjalankan App
 
+Environment **tidak** ditentukan otomatis dari debug/release — harus dioper lewat `--dart-define`:
+
 ```bash
 # Development
-flutter run
+fvm flutter run --dart-define=ENV=dev
 
-# Release
+# Production
-flutter run --release
+fvm flutter run --dart-define=ENV=prod
+
+# Production, release mode
+fvm flutter run --release --dart-define=ENV=prod
 ```
 
-App otomatis menggunakan environment `dev` saat debug dan `prod` saat release.
+Kalau `ENV` tidak dioper, nilainya jatuh ke `dev` (lihat `defaultValue` di `lib/main.dart`).
+
+Di VSCode sudah tersedia konfigurasi **Dev** dan **Prod** di `.vscode/launch.json`, tinggal pilih di panel Run and Debug.
+
+### Build
+
+`--dart-define=ENV=prod` wajib ikut, kalau tidak APK-nya akan memakai database dan base URL milik dev:
+
+```bash
+# APK
+fvm flutter build apk --release --dart-define=ENV=prod
+
+fvm flutter build apk --release --split-per-abi --dart-define=ENV=prod
+
+# App Bundle (Play Store)
+fvm flutter build appbundle --release --dart-define=ENV=prod
+
+# iOS
+fvm flutter build ipa --release --dart-define=ENV=prod
+```
+
+---
+
+## Code Generation
+
+Project ini banyak memakai kode generated (`freezed`, `injectable`, `auto_route`, `json_serializable`, `flutter_gen`). Kode itu **wajib di-generate ulang** setiap kali kamu:
+
+- menambah/mengubah kelas `@freezed` (entity, event, state, DTO)
+- menambah/mengubah anotasi DI (`@injectable`, `@LazySingleton`, `@Injectable(as: ...)`)
+- menambah halaman baru dengan `@RoutePage()`
+- menambah aset di `pubspec.yaml`
+
+```bash
+# Sekali jalan
+fvm dart run build_runner build
+
+# Mode watch — regenerate otomatis saat file berubah, enak dipakai saat ngoding
+fvm dart run build_runner watch
+```
+
+> **Hindari `--delete-conflicting-outputs`.** Flag itu menghapus seluruh file generated **sebelum** mulai build. Kalau build-nya gagal di tengah jalan, kamu berakhir tanpa kode generated sama sekali dan project tidak bisa di-compile. Pakai hanya kalau build_runner benar-benar mengeluh soal konflik output, dan pastikan working tree-mu bersih dulu supaya bisa `git restore`.
 
 ---
 
 ## Environment
 
-Konfigurasi environment ada di `lib/env.dart`:
+Konfigurasi environment ada di `lib/env.dart` — **itu sumber kebenarannya**, jangan disalin ke sini karena gampang basi.
 
-| Environment | Base URL | Database |
+| Environment | Database                |
-|---|---|---|
+| ----------- | ----------------------- |
-| `dev` | `https://api-pos.apskel.id` | `apskel_pos_dev.db` |
+| `dev`       | `apskel_pos_staging.db` |
-| `prod` | `https://api-pos.apskel.id` | `apskel_pos_dev.db` |
+| `prod`      | `apskel_pos_prod.db`    |
 
-Environment dipilih otomatis di `main.dart`:
+Environment dipilih dari `--dart-define=ENV=...` di `lib/main.dart`:
 
 ```dart
-await configureDependencies(
+const String env = String.fromEnvironment('ENV', defaultValue: 'dev');
-  kReleaseMode ? Environment.prod : Environment.dev,
+await configureDependencies(env);
-);
 ```
 
+Nilai `env` diteruskan ke `injectable`, yang lalu memilih antara `DevEnv` (`@dev`) dan `ProdEnv` (`@prod`). Menambah environment baru berarti menambah kelas ber-anotasi di `lib/env.dart`, lalu generate ulang.
+
+Karena `dev` dan `prod` memakai **nama database berbeda**, berpindah environment di perangkat yang sama tidak akan mencampur datanya.
+
 ---
 
 ## Dependency Injection
@@ -136,14 +215,14 @@ DI menggunakan `get_it` + `injectable`. Semua service, repository, dan BLoC dida
 
 ### Modul DI
 
-| File | Isi |
+| File                         | Isi                                                                                       |
-|---|---|
+| ---------------------------- | ----------------------------------------------------------------------------------------- |
-| `di_firebase.dart` | `FirebaseMessaging`, `FlutterLocalNotificationsPlugin`, `DeviceInfoPlugin`, `PackageInfo` |
+| `di_firebase.dart`           | `FirebaseMessaging`, `FlutterLocalNotificationsPlugin`, `DeviceInfoPlugin`, `PackageInfo` |
-| `di_dio.dart` | `Dio` HTTP client |
+| `di_dio.dart`                | `Dio` HTTP client                                                                         |
-| `di_shared_preferences.dart` | `SharedPreferences` |
+| `di_shared_preferences.dart` | `SharedPreferences`                                                                       |
-| `di_database.dart` | `DatabaseHelper` (SQLite) |
+| `di_database.dart`           | `DatabaseHelper` (SQLite)                                                                 |
-| `di_auto_route.dart` | `AppRouter` |
+| `di_auto_route.dart`         | `AppRouter`                                                                               |
-| `di_connectivity.dart` | `Connectivity` |
+| `di_connectivity.dart`       | `Connectivity`                                                                            |
 
 Setelah menambah atau mengubah class yang menggunakan annotation injectable, jalankan:
 
@@ -210,6 +289,43 @@ App dikunci ke mode **landscape** (kiri & kanan) karena didesain untuk tablet PO
 
 ## Catatan Development
 
+- Selalu pakai `fvm flutter` / `fvm dart`, bukan `flutter` / `dart` global
 - Jangan edit `injection.config.dart` dan file `*.freezed.dart` / `*.g.dart` secara manual — file tersebut di-generate otomatis
+- Setelah mengubah kelas `@freezed` atau anotasi DI, jalankan build_runner sebelum menjalankan app
 - Gunakan `log()` dari `dart:developer` untuk logging, bukan `print()`
 - `print()` dinonaktifkan di release mode
+
+---
+
+## Troubleshooting
+
+### `build_runner` gagal: `Missing implementation of visitDotShorthandPropertyAccess`
+
+Kamu sedang memakai Flutter yang terlalu baru. Cek:
+
+```bash
+fvm flutter --version   # harus 3.41.9
+flutter --version       # ini Flutter global, boleh versi apa saja
+```
+
+Kalau versinya bukan 3.41.9, artinya perintahnya jalan tanpa `fvm`. Log build juga memberi petunjuk yang sama:
+
+```
+SDK language version 3.13.0 is newer than `analyzer` language version 3.9.0
+```
+
+Perbaikannya: `fvm use`, lalu ulangi dengan awalan `fvm`.
+
+Menaikkan Flutter melewati 3.41.x mengharuskan seluruh stack codegen ikut naik — `freezed` 2 → 3/4, `build_runner` → 2.16, `injectable_generator` 2 → 3, `auto_route` 9 → 10. `freezed` 3 mewajibkan tiap kelas dideklarasikan `abstract`/`sealed` dan menghapus `when`/`map` (diganti pattern matching), jadi ini pekerjaan tersendiri, bukan sambilan.
+
+### Project tidak bisa di-compile, banyak error `_$Something` tidak ditemukan
+
+Kode generated-nya hilang atau belum dibuat. Jalankan:
+
+```bash
+fvm dart run build_runner build
+```
+
+### `fvm: command not found`
+
+FVM terpasang di `~/AppData/Local/Pub/Cache/bin` (Windows) atau `~/.pub-cache/bin` (macOS/Linux) yang mungkin belum ada di `PATH`. Tambahkan direktori itu ke `PATH`, atau panggil dengan path lengkap.

analysis_options.yaml

@@ -21,3 +21,10 @@ analyzer:
     - test/generated/**
     - "**/**.g.dart"
     - "**/**.freezed.dart"
+    - build/**
+    - android/**
+    - ios/**
+    - web/**
+    - windows/**
+    - macos/**
+    - linux/**

android/gradle.properties

@@ -1,3 +1,7 @@
 org.gradle.jvmargs=-Xmx8G -XX:MaxMetaspaceSize=4G -XX:ReservedCodeCacheSize=512m -XX:+HeapDumpOnOutOfMemoryError
 android.useAndroidX=true
 android.enableJetifier=true
+# This builtInKotlin flag was added automatically by Flutter migrator
+android.builtInKotlin=false
+# This newDsl flag was added automatically by Flutter migrator
+android.newDsl=false

android/gradle/wrapper/gradle-wrapper.properties

@@ -2,4 +2,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.12-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.14.3-all.zip

android/settings.gradle.kts

@@ -18,8 +18,8 @@ pluginManagement {
 
 plugins {
     id("dev.flutter.flutter-plugin-loader") version "1.0.0"
-    id("com.android.application") version "8.7.3" apply false
+    id("com.android.application") version "8.11.1" apply false
-    id("org.jetbrains.kotlin.android") version "2.1.0" apply false
+    id("org.jetbrains.kotlin.android") version "2.2.20" apply false
     id("com.google.gms.google-services") version "4.4.4" apply false
 }
 

docs/integration-weight-based-products.md

@@ -0,0 +1,279 @@
+# Integrasi Produk Timbangan — POS Mobile & Backoffice
+
+**Migrasi:** `000089` · **Base URL:** `/api/v1` · **Kompatibilitas:** mundur penuh
+
+Panduan untuk menjual produk per timbangan (ikan, daging, buah) dari sisi klien.
+Alasan di balik setiap keputusan desain ada di [`rfc-weight-based-products.md`](./rfc-weight-based-products.md).
+
+---
+
+## 1. Konsep inti
+
+**Satu penimbangan = satu baris order.**
+
+Pelanggan memesan Ikan Tude 4,2 ons, lalu memesan Ikan Tude lagi 5,6 ons. Itu **dua
+baris terpisah**, karena keduanya dua ikan berbeda yang ditimbang sendiri-sendiri.
+
+| Bukan begini | Melainkan begini |
+|---|---|
+| `quantity: 9.8` | `quantity: 1, weight: 4.2`<br>`quantity: 1, weight: 5.6` |
+| Dua ikan hilang jejaknya, dan `quantity` bertipe integer sehingga pecahan ditolak | Tiap penimbangan berdiri sendiri, bisa di-void atau dibayar terpisah |
+
+Empat aturan yang berlaku di seluruh dokumen ini:
+
+1. `quantity` untuk produk timbangan **selalu 1**. Backend memaksanya, dan database
+   menolak nilai lain lewat constraint `chk_order_items_weight_single_line`.
+2. `weight` menyimpan angka timbangan, dalam satuan produk itu sendiri (ons, kg, gram —
+   apa pun yang dipilih saat setup).
+3. Harga baris dihitung `weight × unit_price`, bukan `quantity × unit_price`.
+   `unit_price` tetap berarti harga per satu satuan (per ons).
+4. **Jangan pernah menggabungkan dua baris** produk timbangan menjadi satu, meski
+   produknya sama.
+
+Untuk produk biasa tidak ada yang berubah: `weight` tidak dikirim, `quantity` tetap
+cacah seperti sekarang.
+
+---
+
+## 2. Backoffice — setup produk
+
+### 2.1 Pastikan satuannya ada
+
+Satuan disimpan per organisasi. Buat sekali, pakai ulang untuk semua produk timbangan.
+
+`POST /api/v1/units`
+
+```json
+{
+  "name": "Ons",
+  "abbreviation": "ons",
+  "is_active": true
+}
+```
+
+`abbreviation` yang dipakai POS untuk mencetak `4,2 ons` di struk — isi dengan bentuk
+pendek yang benar-benar ingin ditampilkan. Daftar satuan dibaca lewat `GET /api/v1/units`.
+
+### 2.2 Buat produk sebagai produk timbangan
+
+`POST /api/v1/products`
+
+```json
+{
+  "category_id": "…",
+  "name": "Ikan Tude",
+  "price": 4500,
+  "cost": 3000,
+  "sell_by": "weight",
+  "unit_id": "<id satuan Ons>"
+}
+```
+
+| Field | Tipe | Keterangan |
+|---|---|---|
+| `sell_by` | `"unit"` \| `"weight"` | Opsional, default `"unit"`. Nilai lain **ditolak** dengan pesan jelas. |
+| `unit_id` | UUID | **Wajib** saat `sell_by: "weight"`, ditolak backend bila kosong. Opsional untuk produk satuan. |
+| `price` | number | Harga per satu satuan. Rp 4.500 per ons, bukan harga per ikan. |
+
+Pada `PUT /api/v1/products/:id`, `unit_id` **tidak perlu dikirim ulang** bila produknya
+sudah punya satuan — mengubah `sell_by` menjadi `"weight"` saja sudah cukup. Yang ditolak
+adalah kondisi akhirnya: produk yang dijual per timbangan tanpa satuan.
+
+Keduanya juga bisa diubah lewat `PUT /api/v1/products/:id` dengan bentuk yang sama, dan
+ikut terbaca di setiap response produk (`GET /api/v1/products`, `/products/all`,
+`/products/:id`).
+
+### 2.3 Catatan UI
+
+- Kunci `sell_by` **setelah produk punya transaksi**. Mengubah produk lama dari `unit`
+  ke `weight` tidak mengubah baris order yang sudah ada — baris lama tetap dihitung per
+  cacah — tapi akan membingungkan pengguna yang melihat riwayatnya.
+- Saat `weight` dipilih, jadikan pemilih satuan sebagai field **wajib** di form. Backend
+  juga menolaknya, tapi ditangkap di form lebih baik daripada baru gagal saat simpan.
+- Ubah label harga mengikuti satuan yang dipilih: *"Harga per ons"*.
+- Untuk produk satuan, pemilih satuan boleh disembunyikan — `unit_id` opsional dan belum
+  dikonsumsi apa pun di POS.
+
+---
+
+## 3. POS Mobile — transaksi
+
+### 3.1 Bentuk input mengikuti `sell_by`
+
+| `sell_by` | Input di POS | Yang dikirim |
+|---|---|---|
+| `"unit"` | Stepper − / + seperti sekarang | `quantity: n`, tanpa `weight` |
+| `"weight"` | Papan angka desimal, satuan dari `unit` produk | `quantity: 1` + `weight: 4.2` |
+
+### 3.2 Mengirim order
+
+`POST /api/v1/orders`
+
+```json
+{
+  "outlet_id": "…",
+  "user_id": "…",
+  "order_type": "dine_in",
+  "order_items": [
+    { "product_id": "<ikan-tude>",  "quantity": 1, "weight": 4.2 },
+    { "product_id": "<ikan-tude>",  "quantity": 1, "weight": 5.6 },
+    { "product_id": "<nasi-goreng>", "quantity": 2 }
+  ]
+}
+```
+
+Bentuk yang sama berlaku untuk `POST /api/v1/orders/:id/add-items` dan untuk pemesanan
+mandiri `POST /api/v1/self-order/orders`.
+
+**Presisi.** Berat dibulatkan backend ke 3 desimal. Kirim `4.2` atau `4.237`; angka di
+bawah `0.001` membulat ke nol dan ditolak.
+
+**Harga.** Field `unit_price` pada request **diabaikan** — harga selalu diambil backend
+dari master produk. Jangan mengirim harga hasil hitungan sendiri.
+
+---
+
+## 4. Menampilkan baris
+
+Setiap `order_items[]` di response membawa empat field tambahan:
+
+```json
+{
+  "product_name": "Ikan Tude",
+  "quantity": 1,
+  "weight": 4.2,
+  "unit_id": "…",
+  "unit_name": "Ons",
+  "unit_abbreviation": "ons",
+  "unit_price": 4500,
+  "total_price": 18900
+}
+```
+
+Semuanya `null` atau absen untuk produk biasa, jadi cabangkan tampilan pada `weight`:
+
+| Kondisi | Tampilkan |
+|---|---|
+| `weight == null` | `2 × Rp 25.000` |
+| `weight != null` | `4,2 ons × Rp 4.500` |
+
+**Jangan menampilkan `quantity` untuk baris berbobot** — nilainya selalu 1 dan akan
+terbaca seperti "satu ons". Gunakan `weight` dengan `unit_abbreviation`, dan pakai koma
+desimal sesuai format Indonesia.
+
+---
+
+## 5. Void, refund, split bill
+
+Baris berbobot bersifat **utuh**: dibatalkan seluruhnya atau tidak sama sekali. Karena
+`quantity`-nya 1, semua endpoint cukup dikirimi `1`, dan backend menghitung nilai
+rupiahnya dari `weight`.
+
+| Aksi | Endpoint | Field untuk baris berbobot |
+|---|---|---|
+| Void per item | `POST /orders/void` | `items[].quantity: 1` |
+| Refund per item | `POST /orders/:id/refund` | `order_items[].refund_quantity: 1` (atau kosongkan) |
+| Split bill per item | `POST /orders/split-bill` | `items[].quantity: 1` = bayar baris itu penuh |
+
+```json
+{
+  "order_id": "…",
+  "reason": "Salah timbang",
+  "type": "ITEM",
+  "items": [
+    { "order_item_id": "<baris 4,2 ons>", "quantity": 1 }
+  ]
+}
+```
+
+Untuk split bill, baris berbobot hanya bisa berstatus belum dibayar atau lunas — tidak
+ada nilai di antaranya. Sembunyikan stepper jumlah pada baris berbobot, ganti dengan
+tombol pilih baris.
+
+**Batasan yang disengaja.** Mengembalikan *sebagian berat* — 1 ons dari baris 4,2 ons —
+tidak didukung. Koreksi salah timbang ditangani dengan void baris itu lalu input ulang,
+sehingga jejak auditnya tetap jujur.
+
+---
+
+## 6. Referensi error
+
+Semua error mengikuti amplop standar. Pesan validasi baru muncul dengan kode `900`:
+
+```json
+{
+  "success": false,
+  "data": null,
+  "errors": [
+    { "code": "900", "entity": "ORDER",
+      "cause": "product Ikan Tude is sold by weight and requires a weight" }
+  ]
+}
+```
+
+| Pesan (`cause`) | Penyebab | Perbaikan di klien |
+|---|---|---|
+| `… is sold by weight and requires a weight` | Produk `sell_by: "weight"` dikirim tanpa `weight` | Wajibkan input timbangan sebelum item masuk keranjang |
+| `… is not sold by weight and must not carry a weight` | `weight` dikirim untuk produk satuan | Kirim `weight` hanya bila `sell_by == "weight"` |
+| `weight for … must be greater than 0` | Berat nol, negatif, atau membulat ke nol | Validasi minimal `0.001` di keypad |
+| `quantity for … must be at least 1` | Produk satuan dengan `quantity` ≤ 0 | Perilaku lama, tidak berubah |
+
+Pesan menyebut **nama produk**, sehingga bisa ditampilkan apa adanya ke kasir.
+
+### Setup produk (Backoffice)
+
+| Pesan (`cause`) | Penyebab | Perbaikan di klien |
+|---|---|---|
+| `unit_id is required when sell_by is 'weight'` | Produk timbangan dibuat tanpa satuan | Wajibkan pemilih satuan saat Timbangan dipilih |
+| `sell_by must be either 'unit' or 'weight'` | Nilai `sell_by` di luar dua itu | Kirim persis `"unit"` atau `"weight"` |
+| `product '…' is sold by weight and requires a unit_id` | Update membuat produk jadi timbangan tanpa satuan | Kirim `unit_id` bersama perubahan `sell_by` |
+
+---
+
+## 7. Kompatibilitas mundur
+
+- Semua produk lama otomatis `sell_by: "unit"`. Perilakunya identik dengan sebelumnya.
+- `weight` opsional di request. Klien yang tidak mengenalnya tetap berfungsi penuh untuk
+  produk satuan.
+- Field baru di response semuanya `omitempty` — tidak muncul untuk baris biasa, jadi
+  parser lama tidak terganggu.
+- `quantity` tetap **integer** di seluruh API. Tidak ada field yang berubah tipe.
+
+Yang tidak berfungsi di klien lama hanyalah menjual produk timbangan itu sendiri —
+permintaannya ditolak dengan pesan jelas, bukan gagal diam-diam.
+
+---
+
+## 8. Batasan yang diketahui
+
+- **Pembulatan uang ke 2 desimal.** `4,237 ons × Rp 4.500` tersimpan `Rp 19.066,50`,
+  bukan dibulatkan ke rupiah utuh. Bila kasir harus menerima rupiah penuh, ini perlu
+  diputuskan dan diubah di backend lebih dulu (`RoundMoney`, satu tempat).
+- **Stok belum otomatis berkurang** saat penjualan — untuk produk timbangan maupun
+  produk biasa. Pengurangan stok belum tersambung di backend, jadi jangan menampilkan
+  sisa stok yang mengandaikan itu berjalan.
+
+---
+
+## 9. Checklist per tim
+
+**Backoffice Website**
+
+- [ ] CRUD satuan tersedia di menu master data
+- [ ] Form produk punya pilihan cara jual: Satuan / Timbangan
+- [ ] Pemilih satuan menjadi wajib saat Timbangan dipilih
+- [ ] Label harga ikut satuan — "Harga per ons"
+- [ ] `sell_by` dikunci untuk produk yang sudah bertransaksi
+- [ ] Daftar produk menandai mana yang dijual per timbangan
+- [ ] Laporan harian menampilkan kolom Berat
+
+**POS Mobile**
+
+- [ ] Menu membaca `sell_by` tiap produk
+- [ ] Papan angka desimal untuk produk timbangan
+- [ ] Kirim `quantity: 1` + `weight`
+- [ ] Dua penimbangan menjadi dua baris, tidak digabung
+- [ ] Keranjang & struk menampilkan `4,2 ons × Rp 4.500`
+- [ ] Void & refund baris berbobot bersifat utuh
+- [ ] Split bill: pilih baris, bukan stepper jumlah
+- [ ] Pesan error validasi ditampilkan ke kasir

lib/application/auth/login_form/login_form_bloc.dart

@@ -6,6 +6,7 @@ import 'package:freezed_annotation/freezed_annotation.dart';
 import 'package:injectable/injectable.dart';
 
 import '../../../common/service/device_info_service.dart';
+import '../../../common/service/unit_registry.dart';
 import '../../../common/service/fcm_service.dart';
 import '../../../domain/auth/auth.dart';
 
@@ -18,11 +19,13 @@ class LoginFormBloc extends Bloc<LoginFormEvent, LoginFormState> {
   final IAuthRepository _authRepository;
   final FcmService _fcmService;
   final DeviceInfoService _deviceInfoService;
+  final UnitRegistry _unitRegistry;
 
   LoginFormBloc(
     this._authRepository,
     this._fcmService,
     this._deviceInfoService,
+    this._unitRegistry,
   ) : super(LoginFormState.initial()) {
     on<LoginFormEvent>(_onLoginFormEvent);
   }
@@ -62,6 +65,12 @@ class LoginFormBloc extends Bloc<LoginFormEvent, LoginFormState> {
             devicePayload: devicePayload,
           );
 
+          // Master satuan diambil sekali per sesi supaya keranjang bisa
+          // menulis "4,2 ons" tanpa menunggu request saat kasir menimbang.
+          if (failureOrLogin.isRight()) {
+            await _unitRegistry.load(forceRefresh: true);
+          }
+
           emit(
             state.copyWith(
               isSubmitting: false,

lib/application/checkout/checkout_form/checkout_form_bloc.dart

@@ -3,6 +3,7 @@ import 'dart:developer';
 import 'package:bloc/bloc.dart';
 import 'package:freezed_annotation/freezed_annotation.dart';
 import 'package:injectable/injectable.dart' hide Order;
+import 'package:uuid/uuid.dart';
 
 import '../../../common/types/order_type.dart';
 import '../../../domain/delivery/delivery.dart';
@@ -19,6 +20,33 @@ class CheckoutFormBloc extends Bloc<CheckoutFormEvent, CheckoutFormState> {
   CheckoutFormBloc() : super(CheckoutFormState.initial()) {
     on<CheckoutFormEvent>(_onCheckoutFormEvent);
   }
+
+  /// Baris berbobot dihitung `weight × harga`, baris cacah `quantity × harga`.
+  /// Satu tempat saja supaya total keranjang, subtotal, dan ringkasan tidak
+  /// pernah berbeda hitungan.
+  CheckoutFormState _recalculate(
+    CheckoutFormState state,
+    List<ProductQuantity> items,
+  ) {
+    final totalQuantity = items.fold<int>(
+      0,
+      // Baris berbobot selalu satu penimbangan, jadi dihitung satu.
+      (sum, item) => sum + (item.isWeighted ? 1 : item.quantity),
+    );
+
+    final totalPrice = items.fold<double>(
+      0,
+      (sum, item) => sum + item.lineTotal,
+    );
+
+    return state.copyWith(
+      items: items,
+      totalQuantity: totalQuantity,
+      totalPrice: totalPrice.toInt(),
+      isLoading: false,
+    );
+  }
+
   Future<void> _onCheckoutFormEvent(
     CheckoutFormEvent event,
     Emitter<CheckoutFormState> emit,
@@ -26,12 +54,21 @@ class CheckoutFormBloc extends Bloc<CheckoutFormEvent, CheckoutFormState> {
     return event.map(
       addItem: (e) async {
         final currentState = state;
+
+        // Produk timbangan tidak punya stepper — masuk lewat addWeightedItem
+        // setelah kasir memasukkan angka timbangan.
+        if (e.product.isSoldByWeight) {
+          log('⚖️ ${e.product.name} dijual per timbangan, butuh berat');
+          return;
+        }
+
         emit(currentState.copyWith(isLoading: true));
 
         List<ProductQuantity> items = [...currentState.items];
 
         final index = items.indexWhere(
           (element) =>
+              !element.isWeighted &&
               element.product.id == e.product.id &&
               element.variant?.id == e.variant?.id,
         );
@@ -49,35 +86,47 @@ class CheckoutFormBloc extends Bloc<CheckoutFormEvent, CheckoutFormState> {
               quantity: 1,
               variant: e.variant,
               notes: '',
+              lineId: const Uuid().v4(),
             ),
           );
         }
 
         log('🛒 Items updated: ${items.length} items total ${items.toList()}');
 
-        final totalQuantity = items.fold<int>(
+        emit(_recalculate(currentState, items));
-          0,
+      },
-          (sum, item) => sum + item.quantity,
+      addWeightedItem: (e) async {
-        );
+        final currentState = state;
+        emit(currentState.copyWith(isLoading: true));
 
-        final totalPrice = state.items.isEmpty
+        // Sengaja tidak digabung dengan baris lain: dua penimbangan adalah dua
-            ? 0.0
+        // ikan berbeda, masing-masing bisa di-void atau dibayar terpisah.
-            : state.items
+        final items = [
-                  .map(
+          ...currentState.items,
-                    (e) =>
+          ProductQuantity(
-                        (e.product.price * e.quantity) +
+            product: e.product,
-                        (e.variant?.priceModifier ?? 0),
+            variant: e.variant,
-                  )
+            quantity: 1,
-                  .reduce((value, element) => value + element);
+            notes: '',
-
+            lineId: const Uuid().v4(),
-        emit(
+            weight: e.weight,
-          currentState.copyWith(
-            items: items,
-            totalQuantity: totalQuantity,
-            totalPrice: totalPrice.toInt(),
-            isLoading: false,
           ),
-        );
+        ];
+
+        log('⚖️ Penimbangan baru: ${e.product.name} ${e.weight}');
+
+        emit(_recalculate(currentState, items));
+      },
+      updateItemWeight: (e) async {
+        final currentState = state;
+        final items = [...currentState.items];
+
+        final index = items.indexWhere((item) => item.lineId == e.lineId);
+        if (index == -1) return;
+
+        items[index] = items[index].copyWith(weight: e.weight);
+
+        emit(_recalculate(currentState, items));
       },
       removeItem: (e) async {
         final currentState = state;
@@ -86,6 +135,7 @@ class CheckoutFormBloc extends Bloc<CheckoutFormEvent, CheckoutFormState> {
 
         final index = items.indexWhere(
           (element) =>
+              !element.isWeighted &&
               element.product.id == e.product.id &&
               element.variant?.id == e.variant?.id,
         );
@@ -103,32 +153,18 @@ class CheckoutFormBloc extends Bloc<CheckoutFormEvent, CheckoutFormState> {
           }
         }
 
-        final totalQuantity = items.fold<int>(
+        log('🗑️ Item removed. Total items: ${items.length}');
-          0,
-          (sum, item) => sum + item.quantity,
-        );
-        final totalPrice = items.fold<int>(
-          0,
-          (sum, item) =>
-              sum +
-              (item.quantity *
-                  (item.variant?.priceModifier.toInt() ??
-                      item.product.price.toInt())),
-        );
 
-        log(
+        emit(_recalculate(currentState, items));
-          '🗑️ Item removed. Total items: ${items.length}, totalQuantity: $totalQuantity, totalPrice: $totalPrice',
+      },
-        );
+      removeLine: (e) async {
+        final currentState = state;
+        final items = [...currentState.items]
+          ..removeWhere((item) => item.lineId == e.lineId);
 
-        // Emit state baru
+        log('🗑️ Baris dihapus. Sisa ${items.length} baris');
-        emit(
+
-          currentState.copyWith(
+        emit(_recalculate(currentState, items));
-            items: items,
-            totalQuantity: totalQuantity,
-            totalPrice: totalPrice,
-            isLoading: false,
-          ),
-        );
       },
       started: (e) async {
         emit(CheckoutFormState.initial().copyWith(isLoading: true));
@@ -153,14 +189,13 @@ class CheckoutFormBloc extends Bloc<CheckoutFormEvent, CheckoutFormState> {
           );
         }
       },
-      updateItemNotes: (e) async {
+      updateLineNotes: (e) async {
         final currentState = state;
 
-        // Clone list items agar tidak mutasi langsung
+        // Catatan diikat ke baris, bukan ke produk: dua penimbangan produk yang
+        // sama bisa punya catatan berbeda.
         final items = [...currentState.items];
-        final index = items.indexWhere(
+        final index = items.indexWhere((item) => item.lineId == e.lineId);
-          (element) => element.product.id == e.product.id,
-        );
 
         if (index != -1) {
           items[index] = items[index].copyWith(notes: e.notes);
@@ -181,8 +216,8 @@ class CheckoutFormBloc extends Bloc<CheckoutFormEvent, CheckoutFormState> {
         emit(state.copyWith(orderAdded: e.order));
       },
       customerNameChanged: (e) async {
-        emit(state.copyWith(customerName: e.name,));
+        emit(state.copyWith(customerName: e.name));
-      }
+      },
     );
   }
 }

lib/application/checkout/checkout_form/checkout_form_event.dart

@@ -10,15 +10,32 @@ class CheckoutFormEvent with _$CheckoutFormEvent {
     ProductVariant? variant,
   ) = _AddItem;
 
+  /// Satu penimbangan = satu baris baru. Dipanggil setiap kali kasir selesai
+  /// memasukkan angka timbangan, meski produknya sama dengan baris lain.
+  const factory CheckoutFormEvent.addWeightedItem(
+    Product product,
+    ProductVariant? variant,
+    double weight,
+  ) = _AddWeightedItem;
+
+  /// Koreksi angka timbangan pada satu baris tertentu.
+  const factory CheckoutFormEvent.updateItemWeight(
+    String lineId,
+    double weight,
+  ) = _UpdateItemWeight;
+
   const factory CheckoutFormEvent.removeItem(
     Product product,
     ProductVariant? variant,
   ) = _RemoveItem;
 
-  const factory CheckoutFormEvent.updateItemNotes(
+  /// Hapus satu baris utuh — satu-satunya cara membatalkan baris berbobot.
-    Product product,
+  const factory CheckoutFormEvent.removeLine(String lineId) = _RemoveLine;
+
+  const factory CheckoutFormEvent.updateLineNotes(
+    String lineId,
     String notes,
-  ) = _UpdateItemNotes;
+  ) = _UpdateLineNotes;
 
   const factory CheckoutFormEvent.updateOrderType(OrderType orderType) =
       _UpdateOrderType;
@@ -30,6 +47,6 @@ class CheckoutFormEvent with _$CheckoutFormEvent {
 
   const factory CheckoutFormEvent.orderAddedItems(Order? order) =
       _OrderAddedItems;
-    const factory CheckoutFormEvent.customerNameChanged(String name) =
+  const factory CheckoutFormEvent.customerNameChanged(String name) =
       _CustomerNameChanged;
 }

lib/application/order/order_form/order_form_bloc.dart

@@ -3,6 +3,7 @@ import 'package:dartz/dartz.dart' hide Order;
 import 'package:flutter/foundation.dart';
 import 'package:freezed_annotation/freezed_annotation.dart';
 import 'package:injectable/injectable.dart' hide Order;
+import 'package:uuid/uuid.dart';
 
 import '../../../common/types/order_type.dart';
 import '../../../domain/customer/customer.dart';
@@ -59,15 +60,7 @@ class OrderFormBloc extends Bloc<OrderFormEvent, OrderFormState> {
           notes: '',
           customerName: state.customerName ?? "",
           orderItems: e.items
-              .map(
+              .map(OrderItemRequest.fromProductQuantity)
-                (item) => OrderItemRequest(
-                  productId: item.product.id,
-                  productVariantId: item.variant?.id ?? "",
-                  quantity: item.quantity,
-                  unitPrice: item.product.price.toInt(),
-                  notes: item.notes,
-                ),
-              )
               .toList(),
         );
 
@@ -99,15 +92,7 @@ class OrderFormBloc extends Bloc<OrderFormEvent, OrderFormState> {
           notes: '',
           customerName: state.customerName ?? "",
           orderItems: e.items
-              .map(
+              .map(OrderItemRequest.fromProductQuantity)
-                (item) => OrderItemRequest(
-                  productId: item.product.id,
-                  productVariantId: item.variant?.id ?? "",
-                  quantity: item.quantity,
-                  unitPrice: item.product.price.toInt(),
-                  notes: item.notes,
-                ),
-              )
               .toList(),
         );
 
@@ -123,34 +108,35 @@ class OrderFormBloc extends Bloc<OrderFormEvent, OrderFormState> {
       addItemOrder: (e) async {
         Either<OrderFailure, Order> failureOrAddItemOrder;
 
+        // Generate new idempotency key saat user intent (tap Add Items)
+        // Kalau sedang retry, pakai key yang sama
+        final idempotencyKey = state.addItemIdempotencyKey ?? const Uuid().v4();
+
         emit(
           state.copyWith(
             isAddingItemOrder: true,
             failureOrAddItemOrder: none(),
+            addItemIdempotencyKey: idempotencyKey,
           ),
         );
 
         final request = e.items
-            .map(
+            .map(AddItemOrderRequest.fromProductQuantity)
-              (item) => AddItemOrderRequest(
-                productId: item.product.id,
-                productVariantId: item.variant?.id ?? '',
-                quantity: item.quantity,
-                unitPrice: item.product.price.toInt(),
-                notes: item.notes,
-              ),
-            )
             .toList();
 
         failureOrAddItemOrder = await _repository.addItemOrder(
           id: e.orderId,
           request: request,
+          idempotencyKey: idempotencyKey,
         );
 
         emit(
           state.copyWith(
             isAddingItemOrder: false,
             failureOrAddItemOrder: optionOf(failureOrAddItemOrder),
+            // Clear key on success, keep on failure for retry
+            addItemIdempotencyKey:
+                failureOrAddItemOrder.isRight() ? null : idempotencyKey,
           ),
         );
       },

lib/application/order/order_form/order_form_bloc.freezed.dart

@@ -1584,6 +1584,11 @@ mixin _$OrderFormState {
   bool get isCreatingWithPayment => throw _privateConstructorUsedError;
   bool get isAddingItemOrder => throw _privateConstructorUsedError;
 
+  /// Idempotency key untuk add item order.
+  /// Di-generate saat user tap "Add Items", dipakai ulang saat retry,
+  /// di-clear setelah sukses.
+  String? get addItemIdempotencyKey => throw _privateConstructorUsedError;
+
   /// Create a copy of OrderFormState
   /// with the given fields replaced by the non-null parameter values.
   @JsonKey(includeFromJson: false, includeToJson: false)
@@ -1608,6 +1613,7 @@ abstract class $OrderFormStateCopyWith<$Res> {
     bool isCreating,
     bool isCreatingWithPayment,
     bool isAddingItemOrder,
+    String? addItemIdempotencyKey,
   });
 
   $PaymentMethodCopyWith<$Res>? get paymentMethod;
@@ -1638,6 +1644,7 @@ class _$OrderFormStateCopyWithImpl<$Res, $Val extends OrderFormState>
     Object? isCreating = null,
     Object? isCreatingWithPayment = null,
     Object? isAddingItemOrder = null,
+    Object? addItemIdempotencyKey = freezed,
   }) {
     return _then(
       _value.copyWith(
@@ -1678,6 +1685,10 @@ class _$OrderFormStateCopyWithImpl<$Res, $Val extends OrderFormState>
                 ? _value.isAddingItemOrder
                 : isAddingItemOrder // ignore: cast_nullable_to_non_nullable
                       as bool,
+            addItemIdempotencyKey: freezed == addItemIdempotencyKey
+                ? _value.addItemIdempotencyKey
+                : addItemIdempotencyKey // ignore: cast_nullable_to_non_nullable
+                      as String?,
           )
           as $Val,
     );
@@ -1731,6 +1742,7 @@ abstract class _$$OrderFormStateImplCopyWith<$Res>
     bool isCreating,
     bool isCreatingWithPayment,
     bool isAddingItemOrder,
+    String? addItemIdempotencyKey,
   });
 
   @override
@@ -1762,6 +1774,7 @@ class __$$OrderFormStateImplCopyWithImpl<$Res>
     Object? isCreating = null,
     Object? isCreatingWithPayment = null,
     Object? isAddingItemOrder = null,
+    Object? addItemIdempotencyKey = freezed,
   }) {
     return _then(
       _$OrderFormStateImpl(
@@ -1801,6 +1814,10 @@ class __$$OrderFormStateImplCopyWithImpl<$Res>
             ? _value.isAddingItemOrder
             : isAddingItemOrder // ignore: cast_nullable_to_non_nullable
                   as bool,
+        addItemIdempotencyKey: freezed == addItemIdempotencyKey
+            ? _value.addItemIdempotencyKey
+            : addItemIdempotencyKey // ignore: cast_nullable_to_non_nullable
+                  as String?,
       ),
     );
   }
@@ -1821,6 +1838,7 @@ class _$OrderFormStateImpl
     this.isCreating = false,
     this.isCreatingWithPayment = false,
     this.isAddingItemOrder = false,
+    this.addItemIdempotencyKey,
   });
 
   @override
@@ -1845,9 +1863,15 @@ class _$OrderFormStateImpl
   @JsonKey()
   final bool isAddingItemOrder;
 
+  /// Idempotency key untuk add item order.
+  /// Di-generate saat user tap "Add Items", dipakai ulang saat retry,
+  /// di-clear setelah sukses.
+  @override
+  final String? addItemIdempotencyKey;
+
   @override
   String toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) {
-    return 'OrderFormState(paymentMethod: $paymentMethod, customerName: $customerName, customer: $customer, failureOrCreateOrder: $failureOrCreateOrder, failureOrCreateOrderWithPayment: $failureOrCreateOrderWithPayment, failureOrAddItemOrder: $failureOrAddItemOrder, isCreating: $isCreating, isCreatingWithPayment: $isCreatingWithPayment, isAddingItemOrder: $isAddingItemOrder)';
+    return 'OrderFormState(paymentMethod: $paymentMethod, customerName: $customerName, customer: $customer, failureOrCreateOrder: $failureOrCreateOrder, failureOrCreateOrderWithPayment: $failureOrCreateOrderWithPayment, failureOrAddItemOrder: $failureOrAddItemOrder, isCreating: $isCreating, isCreatingWithPayment: $isCreatingWithPayment, isAddingItemOrder: $isAddingItemOrder, addItemIdempotencyKey: $addItemIdempotencyKey)';
   }
 
   @override
@@ -1868,7 +1892,10 @@ class _$OrderFormStateImpl
       ..add(DiagnosticsProperty('failureOrAddItemOrder', failureOrAddItemOrder))
       ..add(DiagnosticsProperty('isCreating', isCreating))
       ..add(DiagnosticsProperty('isCreatingWithPayment', isCreatingWithPayment))
-      ..add(DiagnosticsProperty('isAddingItemOrder', isAddingItemOrder));
+      ..add(DiagnosticsProperty('isAddingItemOrder', isAddingItemOrder))
+      ..add(
+        DiagnosticsProperty('addItemIdempotencyKey', addItemIdempotencyKey),
+      );
   }
 
   @override
@@ -1897,7 +1924,9 @@ class _$OrderFormStateImpl
             (identical(other.isCreatingWithPayment, isCreatingWithPayment) ||
                 other.isCreatingWithPayment == isCreatingWithPayment) &&
             (identical(other.isAddingItemOrder, isAddingItemOrder) ||
-                other.isAddingItemOrder == isAddingItemOrder));
+                other.isAddingItemOrder == isAddingItemOrder) &&
+            (identical(other.addItemIdempotencyKey, addItemIdempotencyKey) ||
+                other.addItemIdempotencyKey == addItemIdempotencyKey));
   }
 
   @override
@@ -1912,6 +1941,7 @@ class _$OrderFormStateImpl
     isCreating,
     isCreatingWithPayment,
     isAddingItemOrder,
+    addItemIdempotencyKey,
   );
 
   /// Create a copy of OrderFormState
@@ -1938,6 +1968,7 @@ abstract class _OrderFormState implements OrderFormState {
     final bool isCreating,
     final bool isCreatingWithPayment,
     final bool isAddingItemOrder,
+    final String? addItemIdempotencyKey,
   }) = _$OrderFormStateImpl;
 
   @override
@@ -1959,6 +1990,12 @@ abstract class _OrderFormState implements OrderFormState {
   @override
   bool get isAddingItemOrder;
 
+  /// Idempotency key untuk add item order.
+  /// Di-generate saat user tap "Add Items", dipakai ulang saat retry,
+  /// di-clear setelah sukses.
+  @override
+  String? get addItemIdempotencyKey;
+
   /// Create a copy of OrderFormState
   /// with the given fields replaced by the non-null parameter values.
   @override

lib/application/order/order_form/order_form_state.dart

@@ -13,6 +13,10 @@ class OrderFormState with _$OrderFormState {
     @Default(false) bool isCreating,
     @Default(false) bool isCreatingWithPayment,
     @Default(false) bool isAddingItemOrder,
+    /// Idempotency key untuk add item order.
+    /// Di-generate saat user tap "Add Items", dipakai ulang saat retry,
+    /// di-clear setelah sukses.
+    String? addItemIdempotencyKey,
   }) = _OrderFormState;
 
   factory OrderFormState.initial() => OrderFormState(

lib/application/payment/payment_form/payment_form_bloc.dart

@@ -4,6 +4,7 @@ import 'package:bloc/bloc.dart';
 import 'package:dartz/dartz.dart' hide Order;
 import 'package:freezed_annotation/freezed_annotation.dart';
 import 'package:injectable/injectable.dart' hide Order;
+import 'package:uuid/uuid.dart';
 
 import '../../../common/types/split_type.dart';
 import '../../../domain/order/order.dart';
@@ -38,7 +39,15 @@ class PaymentFormBloc extends Bloc<PaymentFormEvent, PaymentFormState> {
       submitted: (e) async {
         Either<OrderFailure, Payment> failureOrPayment;
 
-        emit(state.copyWith(isSubmitting: true, failureOrPayment: none()));
+        // Generate new idempotency key saat user intent (tap Bayar)
+        // Kalau sedang retry (isSubmitting sebelumnya gagal), pakai key yang sama
+        final idempotencyKey = state.idempotencyKey ?? const Uuid().v4();
+
+        emit(state.copyWith(
+          isSubmitting: true,
+          failureOrPayment: none(),
+          idempotencyKey: idempotencyKey,
+        ));
 
         final request = PaymentRequest(
           orderId: state.order.id,
@@ -58,20 +67,32 @@ class PaymentFormBloc extends Bloc<PaymentFormEvent, PaymentFormState> {
               .toList(),
         );
 
-        failureOrPayment = await _repository.createPayment(request: request);
+        failureOrPayment = await _repository.createPayment(
+          request: request,
+          idempotencyKey: idempotencyKey,
+        );
 
         emit(
           state.copyWith(
             isSubmitting: false,
             failureOrPayment: optionOf(failureOrPayment),
+            // Clear key on success, keep on failure for retry
+            idempotencyKey: failureOrPayment.isRight() ? null : idempotencyKey,
           ),
         );
       },
       submittedSplitBill: (e) async {
         Either<OrderFailure, Payment> failureOrPayment;
 
+        // Generate new idempotency key untuk split bill
+        final idempotencyKey = state.splitBillIdempotencyKey ?? const Uuid().v4();
+
         emit(
-          state.copyWith(isSubmitting: true, failureOrPaymentSplitBill: none()),
+          state.copyWith(
+            isSubmitting: true,
+            failureOrPaymentSplitBill: none(),
+            splitBillIdempotencyKey: idempotencyKey,
+          ),
         );
 
         final request = PaymentSplitBillRequest(
@@ -93,12 +114,18 @@ class PaymentFormBloc extends Bloc<PaymentFormEvent, PaymentFormState> {
 
         log(request.toString());
 
-        failureOrPayment = await _repository.createSplitBill(request);
+        failureOrPayment = await _repository.createSplitBill(
+          request,
+          idempotencyKey: idempotencyKey,
+        );
 
         emit(
           state.copyWith(
             isSubmitting: false,
             failureOrPaymentSplitBill: optionOf(failureOrPayment),
+            // Clear key on success, keep on failure for retry
+            splitBillIdempotencyKey:
+                failureOrPayment.isRight() ? null : idempotencyKey,
           ),
         );
       },

lib/application/payment/payment_form/payment_form_bloc.freezed.dart

@@ -813,6 +813,14 @@ mixin _$PaymentFormState {
   PaymentMethod? get paymentMethod => throw _privateConstructorUsedError;
   bool get isSubmitting => throw _privateConstructorUsedError;
 
+  /// Idempotency key untuk payment submission.
+  /// Di-generate saat user tap "Bayar", dipakai ulang saat retry,
+  /// di-clear setelah sukses.
+  String? get idempotencyKey => throw _privateConstructorUsedError;
+
+  /// Idempotency key untuk split bill submission.
+  String? get splitBillIdempotencyKey => throw _privateConstructorUsedError;
+
   /// Create a copy of PaymentFormState
   /// with the given fields replaced by the non-null parameter values.
   @JsonKey(includeFromJson: false, includeToJson: false)
@@ -834,6 +842,8 @@ abstract class $PaymentFormStateCopyWith<$Res> {
     Option<Either<OrderFailure, Payment>> failureOrPaymentSplitBill,
     PaymentMethod? paymentMethod,
     bool isSubmitting,
+    String? idempotencyKey,
+    String? splitBillIdempotencyKey,
   });
 
   $OrderCopyWith<$Res> get order;
@@ -861,6 +871,8 @@ class _$PaymentFormStateCopyWithImpl<$Res, $Val extends PaymentFormState>
     Object? failureOrPaymentSplitBill = null,
     Object? paymentMethod = freezed,
     Object? isSubmitting = null,
+    Object? idempotencyKey = freezed,
+    Object? splitBillIdempotencyKey = freezed,
   }) {
     return _then(
       _value.copyWith(
@@ -888,6 +900,14 @@ class _$PaymentFormStateCopyWithImpl<$Res, $Val extends PaymentFormState>
                 ? _value.isSubmitting
                 : isSubmitting // ignore: cast_nullable_to_non_nullable
                       as bool,
+            idempotencyKey: freezed == idempotencyKey
+                ? _value.idempotencyKey
+                : idempotencyKey // ignore: cast_nullable_to_non_nullable
+                      as String?,
+            splitBillIdempotencyKey: freezed == splitBillIdempotencyKey
+                ? _value.splitBillIdempotencyKey
+                : splitBillIdempotencyKey // ignore: cast_nullable_to_non_nullable
+                      as String?,
           )
           as $Val,
     );
@@ -934,6 +954,8 @@ abstract class _$$PaymentFormStateImplCopyWith<$Res>
     Option<Either<OrderFailure, Payment>> failureOrPaymentSplitBill,
     PaymentMethod? paymentMethod,
     bool isSubmitting,
+    String? idempotencyKey,
+    String? splitBillIdempotencyKey,
   });
 
   @override
@@ -962,6 +984,8 @@ class __$$PaymentFormStateImplCopyWithImpl<$Res>
     Object? failureOrPaymentSplitBill = null,
     Object? paymentMethod = freezed,
     Object? isSubmitting = null,
+    Object? idempotencyKey = freezed,
+    Object? splitBillIdempotencyKey = freezed,
   }) {
     return _then(
       _$PaymentFormStateImpl(
@@ -989,6 +1013,14 @@ class __$$PaymentFormStateImplCopyWithImpl<$Res>
             ? _value.isSubmitting
             : isSubmitting // ignore: cast_nullable_to_non_nullable
                   as bool,
+        idempotencyKey: freezed == idempotencyKey
+            ? _value.idempotencyKey
+            : idempotencyKey // ignore: cast_nullable_to_non_nullable
+                  as String?,
+        splitBillIdempotencyKey: freezed == splitBillIdempotencyKey
+            ? _value.splitBillIdempotencyKey
+            : splitBillIdempotencyKey // ignore: cast_nullable_to_non_nullable
+                  as String?,
       ),
     );
   }
@@ -1004,6 +1036,8 @@ class _$PaymentFormStateImpl implements _PaymentFormState {
     required this.failureOrPaymentSplitBill,
     this.paymentMethod,
     this.isSubmitting = false,
+    this.idempotencyKey,
+    this.splitBillIdempotencyKey,
   }) : _pendingItems = pendingItems;
 
   @override
@@ -1026,9 +1060,19 @@ class _$PaymentFormStateImpl implements _PaymentFormState {
   @JsonKey()
   final bool isSubmitting;
 
+  /// Idempotency key untuk payment submission.
+  /// Di-generate saat user tap "Bayar", dipakai ulang saat retry,
+  /// di-clear setelah sukses.
+  @override
+  final String? idempotencyKey;
+
+  /// Idempotency key untuk split bill submission.
+  @override
+  final String? splitBillIdempotencyKey;
+
   @override
   String toString() {
-    return 'PaymentFormState(order: $order, pendingItems: $pendingItems, failureOrPayment: $failureOrPayment, failureOrPaymentSplitBill: $failureOrPaymentSplitBill, paymentMethod: $paymentMethod, isSubmitting: $isSubmitting)';
+    return 'PaymentFormState(order: $order, pendingItems: $pendingItems, failureOrPayment: $failureOrPayment, failureOrPaymentSplitBill: $failureOrPaymentSplitBill, paymentMethod: $paymentMethod, isSubmitting: $isSubmitting, idempotencyKey: $idempotencyKey, splitBillIdempotencyKey: $splitBillIdempotencyKey)';
   }
 
   @override
@@ -1051,7 +1095,14 @@ class _$PaymentFormStateImpl implements _PaymentFormState {
             (identical(other.paymentMethod, paymentMethod) ||
                 other.paymentMethod == paymentMethod) &&
             (identical(other.isSubmitting, isSubmitting) ||
-                other.isSubmitting == isSubmitting));
+                other.isSubmitting == isSubmitting) &&
+            (identical(other.idempotencyKey, idempotencyKey) ||
+                other.idempotencyKey == idempotencyKey) &&
+            (identical(
+                  other.splitBillIdempotencyKey,
+                  splitBillIdempotencyKey,
+                ) ||
+                other.splitBillIdempotencyKey == splitBillIdempotencyKey));
   }
 
   @override
@@ -1063,6 +1114,8 @@ class _$PaymentFormStateImpl implements _PaymentFormState {
     failureOrPaymentSplitBill,
     paymentMethod,
     isSubmitting,
+    idempotencyKey,
+    splitBillIdempotencyKey,
   );
 
   /// Create a copy of PaymentFormState
@@ -1086,6 +1139,8 @@ abstract class _PaymentFormState implements PaymentFormState {
     failureOrPaymentSplitBill,
     final PaymentMethod? paymentMethod,
     final bool isSubmitting,
+    final String? idempotencyKey,
+    final String? splitBillIdempotencyKey,
   }) = _$PaymentFormStateImpl;
 
   @override
@@ -1101,6 +1156,16 @@ abstract class _PaymentFormState implements PaymentFormState {
   @override
   bool get isSubmitting;
 
+  /// Idempotency key untuk payment submission.
+  /// Di-generate saat user tap "Bayar", dipakai ulang saat retry,
+  /// di-clear setelah sukses.
+  @override
+  String? get idempotencyKey;
+
+  /// Idempotency key untuk split bill submission.
+  @override
+  String? get splitBillIdempotencyKey;
+
   /// Create a copy of PaymentFormState
   /// with the given fields replaced by the non-null parameter values.
   @override

lib/application/payment/payment_form/payment_form_state.dart

@@ -9,6 +9,12 @@ class PaymentFormState with _$PaymentFormState {
     required Option<Either<OrderFailure, Payment>> failureOrPaymentSplitBill,
     PaymentMethod? paymentMethod,
     @Default(false) bool isSubmitting,
+    /// Idempotency key untuk payment submission.
+    /// Di-generate saat user tap "Bayar", dipakai ulang saat retry,
+    /// di-clear setelah sukses.
+    String? idempotencyKey,
+    /// Idempotency key untuk split bill submission.
+    String? splitBillIdempotencyKey,
   }) = _PaymentFormState;
 
   factory PaymentFormState.initial() => PaymentFormState(

lib/application/printer/print_struck/print_struck_bloc.dart

@@ -1,5 +1,4 @@
 import 'package:bloc/bloc.dart';
-import 'package:dartz/dartz.dart' hide Order;
 import 'package:freezed_annotation/freezed_annotation.dart';
 import 'package:injectable/injectable.dart' hide Order;
 
@@ -21,136 +20,63 @@ class PrintStruckBloc extends Bloc<PrintStruckEvent, PrintStruckState> {
   Future<void> _onPrintStruckEvent(
     PrintStruckEvent event,
     Emitter<PrintStruckState> emit,
-  ) {
+  ) => event.map(
-    return event.map(
+    order: (e) => _print(emit, e.order, _stationsForOrder(e.order)),
-      order: (e) async {
+    payment: (e) => _print(emit, e.order, const [PrintStation.receipt]),
-        Either<PrinterFailure, Unit> failureOrSuccess;
+    cashier: (e) => _print(emit, e.order, const [PrintStation.cashier]),
+    checker: (e) => _print(emit, e.order, const [PrintStation.checker]),
+    kitchen: (e) => _print(emit, e.order, const [PrintStation.kitchen]),
+    bar: (e) => _print(emit, e.order, const [PrintStation.bar]),
+    voided: (e) => _print(emit, e.order, const [PrintStation.voided]),
+    splitBill: (e) => _print(emit, e.order, const [PrintStation.splitBill]),
+    retryFailed: (_) {
+      final order = state.order;
+      final failed = [
+        for (final station in state.failedStations) station.station,
+      ];
 
-        emit(state.copyWith(isPrinting: true, failureOrPrintStruck: none()));
+      if (order == null || failed.isEmpty) return Future.value();
 
-        failureOrSuccess = await _printerRepository.printStruckOrder(
+      return _print(emit, order, failed);
-          order: e.order,
+    },
-        );
+  );
 
-        emit(
+  /// Struk pelanggan hanya ikut dicetak kalau ordernya sudah dibayar.
-          state.copyWith(
+  List<PrintStation> _stationsForOrder(Order order) => [
-            isPrinting: false,
+    if (order.totalPaid > 0) PrintStation.receipt,
-            failureOrPrintStruck: optionOf(failureOrSuccess),
+    PrintStation.cashier,
-          ),
+    PrintStation.checker,
-        );
+    PrintStation.kitchen,
-      },
+    PrintStation.bar,
-      cashier: (e) async {
+  ];
-        Either<PrinterFailure, Unit> failureOrSuccess;
 
-        emit(state.copyWith(isPrinting: true, failureOrPrintStruck: none()));
+  Future<void> _print(
+    Emitter<PrintStruckState> emit,
+    Order order,
+    List<PrintStation> stations,
+  ) async {
+    // Tombol yang tertekan dua kali tidak boleh memulai job kedua — repository
+    // akan mengantrikannya dan progres yang tampil jadi membingungkan.
+    if (state.isPrinting) return;
 
-        failureOrSuccess = await _printerRepository.printStruckCashier(
+    emit(
-          order: e.order,
+      state.copyWith(
-        );
+        isPrinting: true,
-
+        order: order,
-        emit(
+        jobId: state.jobId + 1,
-          state.copyWith(
+        stations: [
-            isPrinting: false,
+          for (final station in stations) PrintStationResult.pending(station),
-            failureOrPrintStruck: optionOf(failureOrSuccess),
+        ],
-          ),
+      ),
-        );
-      },
-      payment: (e) async {
-        Either<PrinterFailure, Unit> failureOrSuccess;
-
-        emit(state.copyWith(isPrinting: true, failureOrPrintStruck: none()));
-
-        failureOrSuccess = await _printerRepository.printStruckPayment(
-          order: e.order,
-        );
-
-        emit(
-          state.copyWith(
-            isPrinting: false,
-            failureOrPrintStruck: optionOf(failureOrSuccess),
-          ),
-        );
-      },
-      voided: (e) async {
-        Either<PrinterFailure, Unit> failureOrSuccess;
-
-        emit(state.copyWith(isPrinting: true, failureOrPrintStruck: none()));
-
-        failureOrSuccess = await _printerRepository.printStruckVoid(
-          order: e.order,
-        );
-
-        emit(
-          state.copyWith(
-            isPrinting: false,
-            failureOrPrintStruck: optionOf(failureOrSuccess),
-          ),
-        );
-      },
-      splitBill: (e) async {
-        Either<PrinterFailure, Unit> failureOrSuccess;
-
-        emit(state.copyWith(isPrinting: true, failureOrPrintStruck: none()));
-
-        failureOrSuccess = await _printerRepository.printStruckSplitBill(
-          order: e.order,
-        );
-
-        emit(
-          state.copyWith(
-            isPrinting: false,
-            failureOrPrintStruck: optionOf(failureOrSuccess),
-          ),
-        );
-      },
-      kitchen: (e) async {
-        Either<PrinterFailure, Unit> failureOrSuccess;
-
-        emit(state.copyWith(isPrinting: true, failureOrPrintStruck: none()));
-
-        failureOrSuccess = await _printerRepository.printStruckKitchen(
-          order: e.order,
-        );
-
-        emit(
-          state.copyWith(
-            isPrinting: false,
-            failureOrPrintStruck: optionOf(failureOrSuccess),
-          ),
-        );
-      },
-      bar: (e) async {
-        Either<PrinterFailure, Unit> failureOrSuccess;
-
-        emit(state.copyWith(isPrinting: true, failureOrPrintStruck: none()));
-
-        failureOrSuccess = await _printerRepository.printStruckBar(
-          order: e.order,
-        );
-
-        emit(
-          state.copyWith(
-            isPrinting: false,
-            failureOrPrintStruck: optionOf(failureOrSuccess),
-          ),
-        );
-      },
-      checker: (e) async {
-        Either<PrinterFailure, Unit> failureOrSuccess;
-
-        emit(state.copyWith(isPrinting: true, failureOrPrintStruck: none()));
-
-        failureOrSuccess = await _printerRepository.printStruckChecker(
-          order: e.order,
-        );
-
-        emit(
-          state.copyWith(
-            isPrinting: false,
-            failureOrPrintStruck: optionOf(failureOrSuccess),
-          ),
-        );
-      },
     );
+
+    await emit.forEach<List<PrintStationResult>>(
+      _printerRepository.printStations(order: order, stations: stations),
+      onData: (results) => state.copyWith(stations: results),
+    );
+
+    // Cetak bisa selesai setelah bloc ditutup (kasir keluar dari aplikasi).
+    if (isClosed) return;
+    emit(state.copyWith(isPrinting: false));
   }
 }

lib/application/printer/print_struck/print_struck_event.dart

@@ -2,7 +2,9 @@ part of 'print_struck_bloc.dart';
 
 @freezed
 class PrintStruckEvent with _$PrintStruckEvent {
+  /// Cetak seluruh station untuk satu order.
   const factory PrintStruckEvent.order(Order order) = _Order;
+
   const factory PrintStruckEvent.cashier(Order order) = _Cashier;
   const factory PrintStruckEvent.payment(Order order) = _Payment;
   const factory PrintStruckEvent.voided(Order order) = _Voided;
@@ -10,4 +12,8 @@ class PrintStruckEvent with _$PrintStruckEvent {
   const factory PrintStruckEvent.kitchen(Order order) = _Kitchen;
   const factory PrintStruckEvent.bar(Order order) = _Bar;
   const factory PrintStruckEvent.splitBill(Order order) = _SplitBill;
+
+  /// Ulangi hanya station yang gagal di job terakhir, tanpa mencetak ulang
+  /// station yang sudah keluar.
+  const factory PrintStruckEvent.retryFailed() = _RetryFailed;
 }

lib/application/printer/print_struck/print_struck_state.dart

@@ -2,11 +2,33 @@ part of 'print_struck_bloc.dart';
 
 @freezed
 class PrintStruckState with _$PrintStruckState {
-  factory PrintStruckState({
+  const PrintStruckState._();
-    required Option<Either<PrinterFailure, Unit>> failureOrPrintStruck,
+
+  const factory PrintStruckState({
+    /// Status seluruh station di job cetak terakhir, urut sesuai urutan cetak.
+    @Default(<PrintStationResult>[]) List<PrintStationResult> stations,
     @Default(false) bool isPrinting,
+
+    /// Order yang sedang dicetak, disimpan supaya station yang gagal bisa
+    /// diulang tanpa perlu dikirim ulang dari halaman pemanggil.
+    Order? order,
+
+    /// Naik tiap job baru dimulai. UI memakainya untuk tahu kapan harus
+    /// membuka dialog progres.
+    @Default(0) int jobId,
   }) = _PrintStruckState;
 
-  factory PrintStruckState.initial() =>
+  factory PrintStruckState.initial() => const PrintStruckState();
-      PrintStruckState(failureOrPrintStruck: none());
+
+  List<PrintStationResult> get failedStations =>
+      stations.where((station) => station.isFailed).toList();
+
+  bool get hasFailure => failedStations.isNotEmpty;
+
+  /// Station yang benar-benar dicetak — yang dilewati tidak ikut dihitung.
+  int get plannedCount =>
+      stations.where((station) => !station.isSkipped).length;
+
+  int get successCount =>
+      stations.where((station) => station.isSuccess).length;
 }

lib/application/refund/refund_form/refund_form_bloc.dart

@@ -2,6 +2,7 @@ import 'package:bloc/bloc.dart';
 import 'package:dartz/dartz.dart' hide Order;
 import 'package:freezed_annotation/freezed_annotation.dart';
 import 'package:injectable/injectable.dart' hide Order;
+import 'package:uuid/uuid.dart';
 
 import '../../../common/data/refund_data.dart';
 import '../../../domain/order/order.dart';
@@ -34,7 +35,15 @@ class RefundFormBloc extends Bloc<RefundFormEvent, RefundFormState> {
       submitted: (e) async {
         Either<OrderFailure, Unit>? failureOrRefund;
 
-        emit(state.copyWith(isSubmitting: true, failureOrRefund: none()));
+        // Generate new idempotency key saat user intent (tap Refund)
+        // Kalau sedang retry, pakai key yang sama
+        final idempotencyKey = state.idempotencyKey ?? const Uuid().v4();
+
+        emit(state.copyWith(
+          isSubmitting: true,
+          failureOrRefund: none(),
+          idempotencyKey: idempotencyKey,
+        ));
 
         failureOrRefund = await _repository.refundOrder(
           id: state.order.id,
@@ -42,12 +51,15 @@ class RefundFormBloc extends Bloc<RefundFormEvent, RefundFormState> {
               ? state.reason
               : state.refundReason?.value ?? '',
           refundAmount: state.order.totalAmount,
+          idempotencyKey: idempotencyKey,
         );
 
         emit(
           state.copyWith(
             isSubmitting: false,
             failureOrRefund: optionOf(failureOrRefund),
+            // Clear key on success, keep on failure for retry
+            idempotencyKey: failureOrRefund.isRight() ? null : idempotencyKey,
           ),
         );
       },

lib/application/refund/refund_form/refund_form_bloc.freezed.dart

@@ -692,6 +692,11 @@ mixin _$RefundFormState {
       throw _privateConstructorUsedError;
   bool get isSubmitting => throw _privateConstructorUsedError;
 
+  /// Idempotency key untuk refund submission.
+  /// Di-generate saat user tap "Refund", dipakai ulang saat retry,
+  /// di-clear setelah sukses.
+  String? get idempotencyKey => throw _privateConstructorUsedError;
+
   /// Create a copy of RefundFormState
   /// with the given fields replaced by the non-null parameter values.
   @JsonKey(includeFromJson: false, includeToJson: false)
@@ -712,6 +717,7 @@ abstract class $RefundFormStateCopyWith<$Res> {
     RefundReason? refundReason,
     Option<Either<OrderFailure, Unit>> failureOrRefund,
     bool isSubmitting,
+    String? idempotencyKey,
   });
 
   $OrderCopyWith<$Res> get order;
@@ -737,6 +743,7 @@ class _$RefundFormStateCopyWithImpl<$Res, $Val extends RefundFormState>
     Object? refundReason = freezed,
     Object? failureOrRefund = null,
     Object? isSubmitting = null,
+    Object? idempotencyKey = freezed,
   }) {
     return _then(
       _value.copyWith(
@@ -760,6 +767,10 @@ class _$RefundFormStateCopyWithImpl<$Res, $Val extends RefundFormState>
                 ? _value.isSubmitting
                 : isSubmitting // ignore: cast_nullable_to_non_nullable
                       as bool,
+            idempotencyKey: freezed == idempotencyKey
+                ? _value.idempotencyKey
+                : idempotencyKey // ignore: cast_nullable_to_non_nullable
+                      as String?,
           )
           as $Val,
     );
@@ -791,6 +802,7 @@ abstract class _$$RefundFormStateImplCopyWith<$Res>
     RefundReason? refundReason,
     Option<Either<OrderFailure, Unit>> failureOrRefund,
     bool isSubmitting,
+    String? idempotencyKey,
   });
 
   @override
@@ -816,6 +828,7 @@ class __$$RefundFormStateImplCopyWithImpl<$Res>
     Object? refundReason = freezed,
     Object? failureOrRefund = null,
     Object? isSubmitting = null,
+    Object? idempotencyKey = freezed,
   }) {
     return _then(
       _$RefundFormStateImpl(
@@ -839,6 +852,10 @@ class __$$RefundFormStateImplCopyWithImpl<$Res>
             ? _value.isSubmitting
             : isSubmitting // ignore: cast_nullable_to_non_nullable
                   as bool,
+        idempotencyKey: freezed == idempotencyKey
+            ? _value.idempotencyKey
+            : idempotencyKey // ignore: cast_nullable_to_non_nullable
+                  as String?,
       ),
     );
   }
@@ -853,6 +870,7 @@ class _$RefundFormStateImpl implements _RefundFormState {
     this.refundReason,
     required this.failureOrRefund,
     this.isSubmitting = false,
+    this.idempotencyKey,
   });
 
   @override
@@ -867,9 +885,15 @@ class _$RefundFormStateImpl implements _RefundFormState {
   @JsonKey()
   final bool isSubmitting;
 
+  /// Idempotency key untuk refund submission.
+  /// Di-generate saat user tap "Refund", dipakai ulang saat retry,
+  /// di-clear setelah sukses.
+  @override
+  final String? idempotencyKey;
+
   @override
   String toString() {
-    return 'RefundFormState(order: $order, reason: $reason, refundReason: $refundReason, failureOrRefund: $failureOrRefund, isSubmitting: $isSubmitting)';
+    return 'RefundFormState(order: $order, reason: $reason, refundReason: $refundReason, failureOrRefund: $failureOrRefund, isSubmitting: $isSubmitting, idempotencyKey: $idempotencyKey)';
   }
 
   @override
@@ -884,7 +908,9 @@ class _$RefundFormStateImpl implements _RefundFormState {
             (identical(other.failureOrRefund, failureOrRefund) ||
                 other.failureOrRefund == failureOrRefund) &&
             (identical(other.isSubmitting, isSubmitting) ||
-                other.isSubmitting == isSubmitting));
+                other.isSubmitting == isSubmitting) &&
+            (identical(other.idempotencyKey, idempotencyKey) ||
+                other.idempotencyKey == idempotencyKey));
   }
 
   @override
@@ -895,6 +921,7 @@ class _$RefundFormStateImpl implements _RefundFormState {
     refundReason,
     failureOrRefund,
     isSubmitting,
+    idempotencyKey,
   );
 
   /// Create a copy of RefundFormState
@@ -916,6 +943,7 @@ abstract class _RefundFormState implements RefundFormState {
     final RefundReason? refundReason,
     required final Option<Either<OrderFailure, Unit>> failureOrRefund,
     final bool isSubmitting,
+    final String? idempotencyKey,
   }) = _$RefundFormStateImpl;
 
   @override
@@ -929,6 +957,12 @@ abstract class _RefundFormState implements RefundFormState {
   @override
   bool get isSubmitting;
 
+  /// Idempotency key untuk refund submission.
+  /// Di-generate saat user tap "Refund", dipakai ulang saat retry,
+  /// di-clear setelah sukses.
+  @override
+  String? get idempotencyKey;
+
   /// Create a copy of RefundFormState
   /// with the given fields replaced by the non-null parameter values.
   @override

lib/application/refund/refund_form/refund_form_state.dart

@@ -8,6 +8,10 @@ class RefundFormState with _$RefundFormState {
     RefundReason? refundReason,
     required Option<Either<OrderFailure, Unit>> failureOrRefund,
     @Default(false) bool isSubmitting,
+    /// Idempotency key untuk refund submission.
+    /// Di-generate saat user tap "Refund", dipakai ulang saat retry,
+    /// di-clear setelah sukses.
+    String? idempotencyKey,
   }) = _RefundFormState;
 
   factory RefundFormState.initial() => RefundFormState(

lib/application/split_bill/split_bill_form/split_bill_form_bloc.dart

@@ -67,7 +67,11 @@ class SplitBillFormBloc extends Bloc<SplitBillFormEvent, SplitBillFormState> {
           final item = state.pendingItems.firstWhere(
             (item) => item.id == entry.key,
           );
-          newTotal += item.unitPrice.toInt() * entry.value;
+          // Baris berbobot dibayar utuh: nilainya weight x harga, bukan
+          // quantity x harga.
+          newTotal += item.isWeighted
+              ? item.totalPrice
+              : item.unitPrice.toInt() * entry.value;
         }
 
         emit(

lib/application/sync/sync_setting/sync_setting_bloc.dart

@@ -3,6 +3,7 @@ import 'package:dartz/dartz.dart';
 import 'package:freezed_annotation/freezed_annotation.dart';
 import 'package:injectable/injectable.dart';
 
+import '../../../common/service/unit_registry.dart';
 import '../../../domain/category/category.dart';
 import '../../../domain/product/product.dart';
 
@@ -14,9 +15,13 @@ part 'sync_setting_bloc.freezed.dart';
 class SyncSettingBloc extends Bloc<SyncSettingEvent, SyncSettingState> {
   final IProductRepository _productRepository;
   final ICategoryRepository _categoryRepository;
+  final UnitRegistry _unitRegistry;
 
-  SyncSettingBloc(this._productRepository, this._categoryRepository)
+  SyncSettingBloc(
-    : super(SyncSettingState.initial()) {
+    this._productRepository,
+    this._categoryRepository,
+    this._unitRegistry,
+  ) : super(SyncSettingState.initial()) {
     on<SyncSettingEvent>(_onSyncSettingEvent);
   }
 
@@ -97,6 +102,10 @@ class SyncSettingBloc extends Bloc<SyncSettingEvent, SyncSettingState> {
       ),
     );
 
+    // Satuan lebih dulu: produk timbangan butuh singkatannya untuk bisa
+    // ditulis "4,2 ons" begitu selesai disinkronkan.
+    await _unitRegistry.load(forceRefresh: true);
+
     // Sync categories first
     final categoryResult = await _categoryRepository.syncAllCategories();
 
@@ -169,6 +178,8 @@ class SyncSettingBloc extends Bloc<SyncSettingEvent, SyncSettingState> {
   Future<void> _onSyncProducts(Emitter<SyncSettingState> emit) async {
     emit(state.copyWith(isLoading: true, failureOptionSyncProduct: none()));
 
+    await _unitRegistry.load(forceRefresh: true);
+
     final result = await _productRepository.syncAllProducts();
 
     result.fold(

lib/application/void/void_form/void_form_bloc.dart

@@ -3,6 +3,7 @@ import 'package:collection/collection.dart';
 import 'package:dartz/dartz.dart' hide Order;
 import 'package:freezed_annotation/freezed_annotation.dart';
 import 'package:injectable/injectable.dart' hide Order;
+import 'package:uuid/uuid.dart';
 
 import '../../../common/types/void_type.dart';
 import '../../../domain/order/order.dart';
@@ -54,7 +55,10 @@ class VoidFormBloc extends Bloc<VoidFormEvent, VoidFormState> {
             (item) => item.id == entry.key,
           );
           if (item == null) continue;
-          newTotal += item.unitPrice.toInt() * entry.value;
+          // Baris berbobot di-void utuh; rupiahnya sudah weight x harga.
+          newTotal += item.isWeighted
+              ? item.totalPrice
+              : item.unitPrice.toInt() * entry.value;
         }
 
         emit(
@@ -91,7 +95,13 @@ class VoidFormBloc extends Bloc<VoidFormEvent, VoidFormState> {
                 productVariantName: originalItem.productVariantName,
                 quantity: voidQty,
                 unitPrice: originalItem.unitPrice,
-                totalPrice: (originalItem.unitPrice) * voidQty,
+                totalPrice: originalItem.isWeighted
+                    ? originalItem.totalPrice
+                    : (originalItem.unitPrice) * voidQty,
+                weight: originalItem.weight,
+                unitId: originalItem.unitId,
+                unitName: originalItem.unitName,
+                unitAbbreviation: originalItem.unitAbbreviation,
                 modifiers: originalItem.modifiers,
                 notes: originalItem.notes,
                 status: originalItem.status,
@@ -99,18 +109,28 @@ class VoidFormBloc extends Bloc<VoidFormEvent, VoidFormState> {
                 updatedAt: originalItem.updatedAt,
                 printerType: originalItem.printerType,
                 paidQuantity: originalItem.paidQuantity,
+                printToChecker: originalItem.printToChecker,
               ),
             );
           });
         }
 
-        emit(state.copyWith(isSubmitting: true, failureOrVoid: none()));
+        // Generate new idempotency key saat user intent (tap Void)
+        // Kalau sedang retry, pakai key yang sama
+        final idempotencyKey = state.idempotencyKey ?? const Uuid().v4();
+
+        emit(state.copyWith(
+          isSubmitting: true,
+          failureOrVoid: none(),
+          idempotencyKey: idempotencyKey,
+        ));
 
         failureOrVoid = await _repository.voidOrder(
           orderId: state.order.id,
           reason: state.voidReason ?? '',
           orderItems: voidItems,
           type: state.voidType.toStringType(),
+          idempotencyKey: idempotencyKey,
         );
 
         emit(
@@ -118,6 +138,8 @@ class VoidFormBloc extends Bloc<VoidFormEvent, VoidFormState> {
             isSubmitting: false,
             failureOrVoid: optionOf(failureOrVoid),
             voidItems: state.voidType.isItem ? voidItems : state.pendingItems,
+            // Clear key on success, keep on failure for retry
+            idempotencyKey: failureOrVoid.isRight() ? null : idempotencyKey,
           ),
         );
       },

lib/application/void/void_form/void_form_bloc.freezed.dart

@@ -1256,6 +1256,11 @@ mixin _$VoidFormState {
       throw _privateConstructorUsedError;
   bool get isSubmitting => throw _privateConstructorUsedError;
 
+  /// Idempotency key untuk void submission.
+  /// Di-generate saat user tap "Void", dipakai ulang saat retry,
+  /// di-clear setelah sukses atau clearState.
+  String? get idempotencyKey => throw _privateConstructorUsedError;
+
   /// Create a copy of VoidFormState
   /// with the given fields replaced by the non-null parameter values.
   @JsonKey(includeFromJson: false, includeToJson: false)
@@ -1280,6 +1285,7 @@ abstract class $VoidFormStateCopyWith<$Res> {
     int totalPriceVoid,
     Option<Either<OrderFailure, Unit>> failureOrVoid,
     bool isSubmitting,
+    String? idempotencyKey,
   });
 
   $OrderCopyWith<$Res> get order;
@@ -1309,6 +1315,7 @@ class _$VoidFormStateCopyWithImpl<$Res, $Val extends VoidFormState>
     Object? totalPriceVoid = null,
     Object? failureOrVoid = null,
     Object? isSubmitting = null,
+    Object? idempotencyKey = freezed,
   }) {
     return _then(
       _value.copyWith(
@@ -1348,6 +1355,10 @@ class _$VoidFormStateCopyWithImpl<$Res, $Val extends VoidFormState>
                 ? _value.isSubmitting
                 : isSubmitting // ignore: cast_nullable_to_non_nullable
                       as bool,
+            idempotencyKey: freezed == idempotencyKey
+                ? _value.idempotencyKey
+                : idempotencyKey // ignore: cast_nullable_to_non_nullable
+                      as String?,
           )
           as $Val,
     );
@@ -1383,6 +1394,7 @@ abstract class _$$VoidFormStateImplCopyWith<$Res>
     int totalPriceVoid,
     Option<Either<OrderFailure, Unit>> failureOrVoid,
     bool isSubmitting,
+    String? idempotencyKey,
   });
 
   @override
@@ -1412,6 +1424,7 @@ class __$$VoidFormStateImplCopyWithImpl<$Res>
     Object? totalPriceVoid = null,
     Object? failureOrVoid = null,
     Object? isSubmitting = null,
+    Object? idempotencyKey = freezed,
   }) {
     return _then(
       _$VoidFormStateImpl(
@@ -1451,6 +1464,10 @@ class __$$VoidFormStateImplCopyWithImpl<$Res>
             ? _value.isSubmitting
             : isSubmitting // ignore: cast_nullable_to_non_nullable
                   as bool,
+        idempotencyKey: freezed == idempotencyKey
+            ? _value.idempotencyKey
+            : idempotencyKey // ignore: cast_nullable_to_non_nullable
+                  as String?,
       ),
     );
   }
@@ -1469,6 +1486,7 @@ class _$VoidFormStateImpl implements _VoidFormState {
     required this.totalPriceVoid,
     required this.failureOrVoid,
     this.isSubmitting = false,
+    this.idempotencyKey,
   }) : _pendingItems = pendingItems,
        _voidItems = voidItems,
        _selectedItemQuantities = selectedItemQuantities;
@@ -1512,9 +1530,15 @@ class _$VoidFormStateImpl implements _VoidFormState {
   @JsonKey()
   final bool isSubmitting;
 
+  /// Idempotency key untuk void submission.
+  /// Di-generate saat user tap "Void", dipakai ulang saat retry,
+  /// di-clear setelah sukses atau clearState.
+  @override
+  final String? idempotencyKey;
+
   @override
   String toString() {
-    return 'VoidFormState(order: $order, pendingItems: $pendingItems, voidItems: $voidItems, voidType: $voidType, selectedItemQuantities: $selectedItemQuantities, voidReason: $voidReason, totalPriceVoid: $totalPriceVoid, failureOrVoid: $failureOrVoid, isSubmitting: $isSubmitting)';
+    return 'VoidFormState(order: $order, pendingItems: $pendingItems, voidItems: $voidItems, voidType: $voidType, selectedItemQuantities: $selectedItemQuantities, voidReason: $voidReason, totalPriceVoid: $totalPriceVoid, failureOrVoid: $failureOrVoid, isSubmitting: $isSubmitting, idempotencyKey: $idempotencyKey)';
   }
 
   @override
@@ -1544,7 +1568,9 @@ class _$VoidFormStateImpl implements _VoidFormState {
             (identical(other.failureOrVoid, failureOrVoid) ||
                 other.failureOrVoid == failureOrVoid) &&
             (identical(other.isSubmitting, isSubmitting) ||
-                other.isSubmitting == isSubmitting));
+                other.isSubmitting == isSubmitting) &&
+            (identical(other.idempotencyKey, idempotencyKey) ||
+                other.idempotencyKey == idempotencyKey));
   }
 
   @override
@@ -1559,6 +1585,7 @@ class _$VoidFormStateImpl implements _VoidFormState {
     totalPriceVoid,
     failureOrVoid,
     isSubmitting,
+    idempotencyKey,
   );
 
   /// Create a copy of VoidFormState
@@ -1581,6 +1608,7 @@ abstract class _VoidFormState implements VoidFormState {
     required final int totalPriceVoid,
     required final Option<Either<OrderFailure, Unit>> failureOrVoid,
     final bool isSubmitting,
+    final String? idempotencyKey,
   }) = _$VoidFormStateImpl;
 
   @override
@@ -1602,6 +1630,12 @@ abstract class _VoidFormState implements VoidFormState {
   @override
   bool get isSubmitting;
 
+  /// Idempotency key untuk void submission.
+  /// Di-generate saat user tap "Void", dipakai ulang saat retry,
+  /// di-clear setelah sukses atau clearState.
+  @override
+  String? get idempotencyKey;
+
   /// Create a copy of VoidFormState
   /// with the given fields replaced by the non-null parameter values.
   @override

lib/application/void/void_form/void_form_state.dart

@@ -12,6 +12,10 @@ class VoidFormState with _$VoidFormState {
     required int totalPriceVoid,
     required Option<Either<OrderFailure, Unit>> failureOrVoid,
     @Default(false) bool isSubmitting,
+    /// Idempotency key untuk void submission.
+    /// Di-generate saat user tap "Void", dipakai ulang saat retry,
+    /// di-clear setelah sukses atau clearState.
+    String? idempotencyKey,
   }) = _VoidFormState;
 
   factory VoidFormState.initial() => VoidFormState(

lib/common/api/api_client.dart

@@ -16,6 +16,7 @@ import 'interceptors/bad_network_interceptor.dart';
 import 'interceptors/bad_request_interceptor.dart';
 import 'interceptors/connection_timeout_interceptor.dart';
 import 'interceptors/crashlytic_interceptor.dart';
+import 'interceptors/idempotency_interceptor.dart';
 import 'interceptors/internal_server_interceptor.dart';
 import 'interceptors/not_found_interceptor.dart';
 import 'interceptors/unauthorized_interceptor.dart';
@@ -30,6 +31,7 @@ class ApiClient {
     _dio.options.connectTimeout = const Duration(seconds: 20);
     _dio.options.validateStatus = (status) =>
         status != null && status >= 200 && status < 500;
+    _dio.interceptors.add(IdempotencyInterceptor(_dio));
     _dio.interceptors.add(BadNetworkErrorInterceptor());
     _dio.interceptors.add(BadRequestErrorInterceptor());
     _dio.interceptors.add(InternalServerErrorInterceptor());

lib/common/api/interceptors/idempotency_interceptor.dart

@@ -0,0 +1,104 @@
+import 'package:dio/dio.dart';
+import 'package:uuid/uuid.dart';
+
+/// Interceptor yang secara otomatis menambahkan header X-Idempotency-Key
+/// untuk endpoint-endpoint kritis yang memerlukan idempotency.
+///
+/// Key sebaiknya di-generate di level BLoC/Cubit saat user trigger action,
+/// lalu dikirim via headers. Interceptor ini hanya berfungsi sebagai fallback
+/// jika key belum di-set.
+///
+/// Jika response 409 dengan error code `request_in_progress`, interceptor
+/// akan retry setelah delay 1-2 detik.
+class IdempotencyInterceptor extends Interceptor {
+  static const _headerKey = 'X-Idempotency-Key';
+  static const _replayHeader = 'X-Idempotent-Replay';
+
+  // Endpoints that require idempotency keys (exact match)
+  static const _idempotentPaths = [
+    '/api/v1/payments',
+    '/api/v1/orders/void',
+  ];
+
+  // Endpoints that require idempotency keys (pattern match)
+  static final _idempotentPathPatterns = [
+    RegExp(r'/api/v1/orders/.+/add-items$'),
+    RegExp(r'/api/v1/orders/.+/refund$'),
+    RegExp(r'/api/v1/payments/.+/refund$'),
+  ];
+
+  static const _maxRetries = 3;
+  static const _retryDelay = Duration(seconds: 2);
+
+  final Dio _dio;
+
+  IdempotencyInterceptor(this._dio);
+
+  @override
+  void onRequest(RequestOptions options, RequestInterceptorHandler handler) {
+    if (options.method == 'POST' && _requiresIdempotencyKey(options.path)) {
+      // Gunakan key yang sudah di-set dari BLoC, atau generate baru sebagai fallback
+      options.headers[_headerKey] ??= const Uuid().v4();
+    }
+    handler.next(options);
+  }
+
+  @override
+  void onResponse(Response response, ResponseInterceptorHandler handler) {
+    // Log jika response adalah replay dari request sebelumnya
+    final isReplay = response.headers.value(_replayHeader);
+    if (isReplay == 'true') {
+      // Response ini adalah hasil dari request pertama yang sudah diproses.
+      // Treat as success — tidak perlu perlakuan khusus.
+    }
+    handler.next(response);
+  }
+
+  @override
+  void onError(DioException err, ErrorInterceptorHandler handler) async {
+    final response = err.response;
+    final options = err.requestOptions;
+
+    if (response == null) {
+      handler.next(err);
+      return;
+    }
+
+    // Handle 409 Conflict with request_in_progress
+    if (response.statusCode == 409 &&
+        _isRequestInProgress(response.data) &&
+        _requiresIdempotencyKey(options.path)) {
+      final retryCount = options.extra['_idempotency_retry_count'] ?? 0;
+
+      if (retryCount < _maxRetries) {
+        await Future.delayed(_retryDelay);
+
+        options.extra['_idempotency_retry_count'] = retryCount + 1;
+
+        try {
+          final retryResponse = await _dio.fetch(options);
+          handler.resolve(retryResponse);
+        } on DioException catch (e) {
+          handler.next(e);
+        }
+        return;
+      }
+    }
+
+    handler.next(err);
+  }
+
+  bool _requiresIdempotencyKey(String path) {
+    if (_idempotentPaths.any((p) => path.endsWith(p))) return true;
+    if (_idempotentPathPatterns.any((r) => r.hasMatch(path))) return true;
+    return false;
+  }
+
+  bool _isRequestInProgress(dynamic data) {
+    if (data is Map<String, dynamic>) {
+      final errorCode = data['error_code'] ?? data['code'] ?? '';
+      return errorCode == 'request_in_progress';
+    }
+    return false;
+  }
+}

lib/common/constant/local_storage_key.dart

@@ -2,4 +2,5 @@ class LocalStorageKey {
   static const String token = 'token';
   static const String user = 'user';
   static const String outlet = 'outlet';
+  static const String units = 'units';
 }

lib/common/database/database_helper.dart

@@ -17,7 +17,7 @@ class DatabaseHelper {
 
     return await openDatabase(
       path,
-      version: 1, // Updated version for categories table
+      version: 3,
       onCreate: _onCreate,
       onUpgrade: _onUpgrade,
     );
@@ -38,10 +38,15 @@ class DatabaseHelper {
         business_type TEXT,
         image_url TEXT,
         printer_type TEXT,
+        print_to_checker INTEGER DEFAULT 0,
         metadata TEXT,
         is_active INTEGER,
         created_at TEXT,
-        updated_at TEXT
+        updated_at TEXT,
+        sell_by TEXT DEFAULT 'unit',
+        unit_id TEXT,
+        unit_name TEXT,
+        unit_abbreviation TEXT
       )
     ''');
 
@@ -107,7 +112,24 @@ class DatabaseHelper {
     await db.execute('CREATE INDEX idx_printers_type ON printers(type)');
   }
 
-  Future<void> _onUpgrade(Database db, int oldVersion, int newVersion) async {}
+  Future<void> _onUpgrade(Database db, int oldVersion, int newVersion) async {
+    if (oldVersion < 2) {
+      await db.execute(
+        'ALTER TABLE products ADD COLUMN print_to_checker INTEGER DEFAULT 0',
+      );
+    }
+
+    // Produk timbangan: cara jual dan satuan ikut disimpan lokal supaya POS
+    // tetap bisa menampilkan "4,2 ons" saat offline.
+    if (oldVersion < 3) {
+      await db.execute(
+        "ALTER TABLE products ADD COLUMN sell_by TEXT DEFAULT 'unit'",
+      );
+      await db.execute('ALTER TABLE products ADD COLUMN unit_id TEXT');
+      await db.execute('ALTER TABLE products ADD COLUMN unit_name TEXT');
+      await db.execute('ALTER TABLE products ADD COLUMN unit_abbreviation TEXT');
+    }
+  }
 
   Future<void> close() async {
     final db = await database;

lib/common/extension/double_extension.dart

@@ -13,3 +13,10 @@ extension DoubleExt on double {
     decimalDigits: 0,
   ).format(this);
 }
+
+extension WeightExt on double {
+  /// Format berat gaya Indonesia: koma desimal, tanpa nol di belakang.
+  /// `4.2` → `4,2`, `4.237` → `4,237`, `5.0` → `5`.
+  String get weightFormat =>
+      NumberFormat('#,##0.###', 'id').format(this);
+}

lib/common/function/app_function.dart

@@ -75,3 +75,25 @@ int generateRandomNumber() {
   final random = Random();
   return 1 + random.nextInt(10000);
 }
+
+/// Ambil pesan validasi dari amplop error standar backend.
+///
+/// Untuk produk timbangan pesannya menyebut nama produk — misalnya
+/// "product Ikan Tude is sold by weight and requires a weight" — jadi layak
+/// ditampilkan apa adanya ke kasir alih-alih diganti pesan generik.
+String? extractApiErrorCause(dynamic responseData) {
+  if (responseData is! Map) return null;
+
+  final errors = responseData['errors'];
+  if (errors is! List || errors.isEmpty) return null;
+
+  final causes = errors
+      .whereType<Map>()
+      .map((e) => (e['cause'] ?? e['message'])?.toString())
+      .where((cause) => cause != null && cause.isNotEmpty)
+      .cast<String>()
+      .toList();
+
+  if (causes.isEmpty) return null;
+  return causes.join('\n');
+}

lib/common/service/unit_registry.dart

@@ -0,0 +1,48 @@
+import 'dart:developer';
+
+import 'package:injectable/injectable.dart';
+
+import '../../domain/unit/unit.dart';
+
+/// Kamus satuan yang dipakai untuk menerjemahkan `unit_id` sebuah produk
+/// menjadi singkatan yang dicetak di keranjang dan struk (`4,2 ons`).
+///
+/// Response produk hanya dijamin membawa `unit_id`; nama dan singkatannya
+/// datang dari `GET /api/v1/units`. Registry ini menjembatani keduanya tanpa
+/// memaksa setiap pemanggil menunggu request.
+@lazySingleton
+class UnitRegistry {
+  final IUnitRepository _repository;
+  final _logName = 'UnitRegistry';
+
+  Map<String, ProductUnit> _unitsById = {};
+
+  UnitRegistry(this._repository);
+
+  bool get isEmpty => _unitsById.isEmpty;
+
+  ProductUnit? byId(String? id) {
+    if (id == null || id.isEmpty) return null;
+    return _unitsById[id];
+  }
+
+  String abbreviationOf(String? id) => byId(id)?.abbreviation ?? '';
+
+  String nameOf(String? id) => byId(id)?.name ?? '';
+
+  /// Muat satuan ke memori. Aman dipanggil berulang; [forceRefresh] menembak
+  /// server ulang saat pengguna melakukan sinkronisasi manual.
+  Future<void> load({bool forceRefresh = false}) async {
+    final result = await _repository.getUnits(forceRefresh: forceRefresh);
+
+    result.fold(
+      (failure) => log('⚠️ Gagal memuat satuan: $failure', name: _logName),
+      (units) {
+        _unitsById = {for (final unit in units) unit.id: unit};
+        log('📏 ${units.length} satuan siap dipakai', name: _logName);
+      },
+    );
+  }
+
+  void clear() => _unitsById = {};
+}

lib/common/types/sell_by.dart

@@ -0,0 +1,19 @@
+/// Cara sebuah produk dijual.
+///
+/// Lihat `docs/integration-weight-based-products.md` — backend hanya menerima
+/// dua nilai ini, dan produk lama otomatis dianggap [SellBy.unit].
+class SellBy {
+  const SellBy._();
+
+  /// Dijual per cacah. `quantity` integer, `weight` tidak dikirim.
+  static const String unit = 'unit';
+
+  /// Dijual per timbangan. `quantity` selalu 1, `weight` wajib.
+  static const String weight = 'weight';
+
+  static bool isWeight(String? value) => value == weight;
+
+  /// Nilai apa pun di luar dua yang dikenal diperlakukan sebagai [unit],
+  /// sama seperti perilaku backend untuk produk lama.
+  static String normalize(String? value) => value == weight ? weight : unit;
+}

lib/common/url/api_path.dart

@@ -4,6 +4,7 @@ class ApiPath {
   static const String outlets = '/api/v1/outlets';
   static const String categories = '/api/v1/categories';
   static const String products = '/api/v1/products';
+  static const String units = '/api/v1/units';
   static const String tables = '/api/v1/tables';
   static const String customers = '/api/v1/customers';
   static const String paymentMethods = '/api/v1/payment-methods';

lib/domain/order/entities/add_item_order_request_entity.dart

@@ -8,6 +8,9 @@ class AddItemOrderRequest with _$AddItemOrderRequest {
     required int quantity,
     required int unitPrice,
     required String notes,
+
+    /// Hanya diisi untuk produk `sell_by: "weight"`.
+    double? weight,
   }) = _AddItemOrderRequest;
 
   factory AddItemOrderRequest.empty() => const AddItemOrderRequest(
@@ -17,4 +20,14 @@ class AddItemOrderRequest with _$AddItemOrderRequest {
     unitPrice: 0,
     notes: '',
   );
+
+  factory AddItemOrderRequest.fromProductQuantity(ProductQuantity item) =>
+      AddItemOrderRequest(
+        productId: item.product.id,
+        productVariantId: item.variant?.id ?? '',
+        quantity: item.isWeighted ? 1 : item.quantity,
+        unitPrice: item.product.price.toInt(),
+        notes: item.notes,
+        weight: item.weight,
+      );
 }

lib/domain/order/entities/order_entity.dart

@@ -125,6 +125,7 @@ class Order with _$Order {
         createdAt: DateTime.now().subtract(const Duration(hours: 1)),
         updatedAt: DateTime.now(),
         printerType: 'Barista',
+        printToChecker: false,
         paidQuantity: 2,
         categoryId: 'CAT-001',
         categoryName: 'Minuman',
@@ -145,6 +146,28 @@ class Order with _$Order {
         createdAt: DateTime.now().subtract(const Duration(hours: 1)),
         updatedAt: DateTime.now(),
         printerType: 'Kitchen',
+        printToChecker: false,
+        paidQuantity: 1,
+        categoryId: 'CAT-002',
+        categoryName: 'Makanan',
+      ),
+       OrderItem(
+        id: 'ITEM-003',
+        orderId: 'ORD-001',
+        productId: 'PROD-003',
+        productName: 'Pasta',
+        productVariantId: 'VAR-002',
+        productVariantName: '',
+        quantity: 1,
+        unitPrice: 50000,
+        totalPrice: 50000,
+        modifiers: [],
+        notes: '',
+        status: 'Served',
+        createdAt: DateTime.now().subtract(const Duration(hours: 1)),
+        updatedAt: DateTime.now(),
+        printerType: 'Kitchen',
+        printToChecker: false,
         paidQuantity: 1,
         categoryId: 'CAT-002',
         categoryName: 'Makanan',
@@ -174,19 +197,19 @@ class Order with _$Order {
   );
 
   // For Add Item Order
-  factory Order.fromLastOrder(Order order, List<ProductQuantity> products) =>
+  factory Order.fromLastOrder(Order order, List<ProductQuantity> products) {
-      order.copyWith(
+    final subtotal = products.fold<int>(
-        orderItems: products
+      0,
-            .map((e) => OrderItem.fromProductQuantity(e))
+      (sum, item) => sum + item.lineTotal.toInt(),
-            .toList(),
+    );
-        totalAmount: products
+
-            .map((e) => e.product.price.toInt() * e.quantity)
+    return order.copyWith(
-            .reduce((value, element) => value + element),
+      orderItems: products.map(OrderItem.fromProductQuantity).toList(),
-            subtotal: products
+      totalAmount: subtotal,
-            .map((e) => e.product.price.toInt() * e.quantity)
+      subtotal: subtotal,
-            .reduce((value, element) => value + element),
+      metadata: order.metadata,
-            metadata: order.metadata,
+    );
-      );
+  }
 
   List<OrderItem> get orderItemNotCancelled =>
       orderItems.where((item) => item.status != 'cancelled').toList();
@@ -194,6 +217,8 @@ class Order with _$Order {
 
 @freezed
 class OrderItem with _$OrderItem {
+  const OrderItem._();
+
   const factory OrderItem({
     required String id,
     required String orderId,
@@ -210,9 +235,16 @@ class OrderItem with _$OrderItem {
     required DateTime createdAt,
     required DateTime updatedAt,
     required String printerType,
+    required bool printToChecker,
     required int paidQuantity,
     required String categoryId,
     required String categoryName,
+
+    /// Angka timbangan baris ini. `null` untuk produk cacah.
+    double? weight,
+    @Default('') String unitId,
+    @Default('') String unitName,
+    @Default('') String unitAbbreviation,
   }) = _OrderItem;
 
   factory OrderItem.empty() => OrderItem(
@@ -231,6 +263,7 @@ class OrderItem with _$OrderItem {
     createdAt: DateTime(1970),
     updatedAt: DateTime(1970),
     printerType: '',
+    printToChecker: false,
     paidQuantity: 0,
     categoryId: '',
     categoryName: '',
@@ -244,18 +277,43 @@ class OrderItem with _$OrderItem {
         productName: productQuantity.product.name,
         productVariantId: productQuantity.variant?.id ?? '',
         productVariantName: productQuantity.variant?.name ?? '',
-        quantity: productQuantity.quantity,
+        quantity: productQuantity.isWeighted ? 1 : productQuantity.quantity,
         unitPrice: productQuantity.product.price.toInt(),
-        totalPrice: (productQuantity.product.price * productQuantity.quantity)
+        totalPrice: productQuantity.lineTotal.toInt(),
-            .toInt(),
         modifiers: [],
         notes: productQuantity.notes,
         status: 'pending',
         createdAt: DateTime.now(),
         updatedAt: DateTime.now(),
         printerType: productQuantity.product.printerType,
+        printToChecker: productQuantity.product.printToChecker,
         paidQuantity: 0,
         categoryId: '',
         categoryName: '',
+        weight: productQuantity.weight,
+        unitId: productQuantity.product.unitId,
+        unitName: productQuantity.product.unitName,
+        unitAbbreviation: productQuantity.product.unitAbbreviation,
       );
+
+  /// Baris hasil penimbangan — utuh, tidak bisa dipecah sebagian.
+  bool get isWeighted => weight != null && weight! > 0;
+
+  /// Singkatan satuan untuk ditampilkan; jatuh ke nama panjang bila kosong.
+  String get unitLabel =>
+      unitAbbreviation.isNotEmpty ? unitAbbreviation : unitName;
+
+  /// `4,2 ons` untuk baris berbobot, `2` untuk baris biasa.
+  ///
+  /// Jangan menampilkan [quantity] mentah pada baris berbobot — nilainya selalu
+  /// 1 dan terbaca seperti "satu ons".
+  String get quantityLabel {
+    if (!isWeighted) return quantity.toString();
+    final value = weight!.weightFormat;
+    return unitLabel.isEmpty ? value : '$value $unitLabel';
+  }
+
+  /// `4,2 ons x Rp 4.500` atau `2 x Rp 25.000`.
+  String get quantityPriceLabel =>
+      '$quantityLabel x ${unitPrice.currencyFormatRpV2}';
 }

lib/domain/order/entities/order_request_entity.dart

@@ -33,6 +33,10 @@ class OrderItemRequest with _$OrderItemRequest {
     required int quantity,
     required int unitPrice,
     required String notes,
+
+    /// Hanya diisi untuk produk `sell_by: "weight"`; produk cacah tidak boleh
+    /// mengirim berat sama sekali.
+    double? weight,
   }) = _OrderItemRequest;
 
   factory OrderItemRequest.empty() => const OrderItemRequest(
@@ -42,4 +46,16 @@ class OrderItemRequest with _$OrderItemRequest {
     unitPrice: 0,
     notes: '',
   );
+
+  /// Bentuk baris dari isi keranjang: produk timbangan selalu `quantity: 1`
+  /// ditambah `weight`, produk cacah tetap seperti sebelumnya.
+  factory OrderItemRequest.fromProductQuantity(ProductQuantity item) =>
+      OrderItemRequest(
+        productId: item.product.id,
+        productVariantId: item.variant?.id ?? '',
+        quantity: item.isWeighted ? 1 : item.quantity,
+        unitPrice: item.product.price.toInt(),
+        notes: item.notes,
+        weight: item.weight,
+      );
 }

lib/domain/order/order.dart

@@ -3,6 +3,7 @@ import 'package:freezed_annotation/freezed_annotation.dart';
 
 import '../../common/api/api_failure.dart';
 import '../../common/types/split_type.dart';
+import '../../common/extension/extension.dart';
 import '../product/product.dart';
 
 part 'order.freezed.dart';

lib/domain/order/order.freezed.dart

@@ -1002,10 +1002,17 @@ mixin _$OrderItem {
   DateTime get createdAt => throw _privateConstructorUsedError;
   DateTime get updatedAt => throw _privateConstructorUsedError;
   String get printerType => throw _privateConstructorUsedError;
+  bool get printToChecker => throw _privateConstructorUsedError;
   int get paidQuantity => throw _privateConstructorUsedError;
   String get categoryId => throw _privateConstructorUsedError;
   String get categoryName => throw _privateConstructorUsedError;
 
+  /// Angka timbangan baris ini. `null` untuk produk cacah.
+  double? get weight => throw _privateConstructorUsedError;
+  String get unitId => throw _privateConstructorUsedError;
+  String get unitName => throw _privateConstructorUsedError;
+  String get unitAbbreviation => throw _privateConstructorUsedError;
+
   /// Create a copy of OrderItem
   /// with the given fields replaced by the non-null parameter values.
   @JsonKey(includeFromJson: false, includeToJson: false)
@@ -1034,9 +1041,14 @@ abstract class $OrderItemCopyWith<$Res> {
     DateTime createdAt,
     DateTime updatedAt,
     String printerType,
+    bool printToChecker,
     int paidQuantity,
     String categoryId,
     String categoryName,
+    double? weight,
+    String unitId,
+    String unitName,
+    String unitAbbreviation,
   });
 }
 
@@ -1070,9 +1082,14 @@ class _$OrderItemCopyWithImpl<$Res, $Val extends OrderItem>
     Object? createdAt = null,
     Object? updatedAt = null,
     Object? printerType = null,
+    Object? printToChecker = null,
     Object? paidQuantity = null,
     Object? categoryId = null,
     Object? categoryName = null,
+    Object? weight = freezed,
+    Object? unitId = null,
+    Object? unitName = null,
+    Object? unitAbbreviation = null,
   }) {
     return _then(
       _value.copyWith(
@@ -1136,6 +1153,10 @@ class _$OrderItemCopyWithImpl<$Res, $Val extends OrderItem>
                 ? _value.printerType
                 : printerType // ignore: cast_nullable_to_non_nullable
                       as String,
+            printToChecker: null == printToChecker
+                ? _value.printToChecker
+                : printToChecker // ignore: cast_nullable_to_non_nullable
+                      as bool,
             paidQuantity: null == paidQuantity
                 ? _value.paidQuantity
                 : paidQuantity // ignore: cast_nullable_to_non_nullable
@@ -1148,6 +1169,22 @@ class _$OrderItemCopyWithImpl<$Res, $Val extends OrderItem>
                 ? _value.categoryName
                 : categoryName // ignore: cast_nullable_to_non_nullable
                       as String,
+            weight: freezed == weight
+                ? _value.weight
+                : weight // ignore: cast_nullable_to_non_nullable
+                      as double?,
+            unitId: null == unitId
+                ? _value.unitId
+                : unitId // ignore: cast_nullable_to_non_nullable
+                      as String,
+            unitName: null == unitName
+                ? _value.unitName
+                : unitName // ignore: cast_nullable_to_non_nullable
+                      as String,
+            unitAbbreviation: null == unitAbbreviation
+                ? _value.unitAbbreviation
+                : unitAbbreviation // ignore: cast_nullable_to_non_nullable
+                      as String,
           )
           as $Val,
     );
@@ -1179,9 +1216,14 @@ abstract class _$$OrderItemImplCopyWith<$Res>
     DateTime createdAt,
     DateTime updatedAt,
     String printerType,
+    bool printToChecker,
     int paidQuantity,
     String categoryId,
     String categoryName,
+    double? weight,
+    String unitId,
+    String unitName,
+    String unitAbbreviation,
   });
 }
 
@@ -1214,9 +1256,14 @@ class __$$OrderItemImplCopyWithImpl<$Res>
     Object? createdAt = null,
     Object? updatedAt = null,
     Object? printerType = null,
+    Object? printToChecker = null,
     Object? paidQuantity = null,
     Object? categoryId = null,
     Object? categoryName = null,
+    Object? weight = freezed,
+    Object? unitId = null,
+    Object? unitName = null,
+    Object? unitAbbreviation = null,
   }) {
     return _then(
       _$OrderItemImpl(
@@ -1280,6 +1327,10 @@ class __$$OrderItemImplCopyWithImpl<$Res>
             ? _value.printerType
             : printerType // ignore: cast_nullable_to_non_nullable
                   as String,
+        printToChecker: null == printToChecker
+            ? _value.printToChecker
+            : printToChecker // ignore: cast_nullable_to_non_nullable
+                  as bool,
         paidQuantity: null == paidQuantity
             ? _value.paidQuantity
             : paidQuantity // ignore: cast_nullable_to_non_nullable
@@ -1292,6 +1343,22 @@ class __$$OrderItemImplCopyWithImpl<$Res>
             ? _value.categoryName
             : categoryName // ignore: cast_nullable_to_non_nullable
                   as String,
+        weight: freezed == weight
+            ? _value.weight
+            : weight // ignore: cast_nullable_to_non_nullable
+                  as double?,
+        unitId: null == unitId
+            ? _value.unitId
+            : unitId // ignore: cast_nullable_to_non_nullable
+                  as String,
+        unitName: null == unitName
+            ? _value.unitName
+            : unitName // ignore: cast_nullable_to_non_nullable
+                  as String,
+        unitAbbreviation: null == unitAbbreviation
+            ? _value.unitAbbreviation
+            : unitAbbreviation // ignore: cast_nullable_to_non_nullable
+                  as String,
       ),
     );
   }
@@ -1299,7 +1366,7 @@ class __$$OrderItemImplCopyWithImpl<$Res>
 
 /// @nodoc
 
-class _$OrderItemImpl implements _OrderItem {
+class _$OrderItemImpl extends _OrderItem {
   const _$OrderItemImpl({
     required this.id,
     required this.orderId,
@@ -1316,10 +1383,16 @@ class _$OrderItemImpl implements _OrderItem {
     required this.createdAt,
     required this.updatedAt,
     required this.printerType,
+    required this.printToChecker,
     required this.paidQuantity,
     required this.categoryId,
     required this.categoryName,
-  }) : _modifiers = modifiers;
+    this.weight,
+    this.unitId = '',
+    this.unitName = '',
+    this.unitAbbreviation = '',
+  }) : _modifiers = modifiers,
+       super._();
 
   @override
   final String id;
@@ -1358,15 +1431,30 @@ class _$OrderItemImpl implements _OrderItem {
   @override
   final String printerType;
   @override
+  final bool printToChecker;
+  @override
   final int paidQuantity;
   @override
   final String categoryId;
   @override
   final String categoryName;
 
+  /// Angka timbangan baris ini. `null` untuk produk cacah.
+  @override
+  final double? weight;
+  @override
+  @JsonKey()
+  final String unitId;
+  @override
+  @JsonKey()
+  final String unitName;
+  @override
+  @JsonKey()
+  final String unitAbbreviation;
+
   @override
   String toString() {
-    return 'OrderItem(id: $id, orderId: $orderId, productId: $productId, productName: $productName, productVariantId: $productVariantId, productVariantName: $productVariantName, quantity: $quantity, unitPrice: $unitPrice, totalPrice: $totalPrice, modifiers: $modifiers, notes: $notes, status: $status, createdAt: $createdAt, updatedAt: $updatedAt, printerType: $printerType, paidQuantity: $paidQuantity, categoryId: $categoryId, categoryName: $categoryName)';
+    return 'OrderItem(id: $id, orderId: $orderId, productId: $productId, productName: $productName, productVariantId: $productVariantId, productVariantName: $productVariantName, quantity: $quantity, unitPrice: $unitPrice, totalPrice: $totalPrice, modifiers: $modifiers, notes: $notes, status: $status, createdAt: $createdAt, updatedAt: $updatedAt, printerType: $printerType, printToChecker: $printToChecker, paidQuantity: $paidQuantity, categoryId: $categoryId, categoryName: $categoryName, weight: $weight, unitId: $unitId, unitName: $unitName, unitAbbreviation: $unitAbbreviation)';
   }
 
   @override
@@ -1402,16 +1490,24 @@ class _$OrderItemImpl implements _OrderItem {
                 other.updatedAt == updatedAt) &&
             (identical(other.printerType, printerType) ||
                 other.printerType == printerType) &&
+            (identical(other.printToChecker, printToChecker) ||
+                other.printToChecker == printToChecker) &&
             (identical(other.paidQuantity, paidQuantity) ||
                 other.paidQuantity == paidQuantity) &&
             (identical(other.categoryId, categoryId) ||
                 other.categoryId == categoryId) &&
             (identical(other.categoryName, categoryName) ||
-                other.categoryName == categoryName));
+                other.categoryName == categoryName) &&
+            (identical(other.weight, weight) || other.weight == weight) &&
+            (identical(other.unitId, unitId) || other.unitId == unitId) &&
+            (identical(other.unitName, unitName) ||
+                other.unitName == unitName) &&
+            (identical(other.unitAbbreviation, unitAbbreviation) ||
+                other.unitAbbreviation == unitAbbreviation));
   }
 
   @override
-  int get hashCode => Object.hash(
+  int get hashCode => Object.hashAll([
     runtimeType,
     id,
     orderId,
@@ -1428,10 +1524,15 @@ class _$OrderItemImpl implements _OrderItem {
     createdAt,
     updatedAt,
     printerType,
+    printToChecker,
     paidQuantity,
     categoryId,
     categoryName,
-  );
+    weight,
+    unitId,
+    unitName,
+    unitAbbreviation,
+  ]);
 
   /// Create a copy of OrderItem
   /// with the given fields replaced by the non-null parameter values.
@@ -1442,7 +1543,7 @@ class _$OrderItemImpl implements _OrderItem {
       __$$OrderItemImplCopyWithImpl<_$OrderItemImpl>(this, _$identity);
 }
 
-abstract class _OrderItem implements OrderItem {
+abstract class _OrderItem extends OrderItem {
   const factory _OrderItem({
     required final String id,
     required final String orderId,
@@ -1459,10 +1560,16 @@ abstract class _OrderItem implements OrderItem {
     required final DateTime createdAt,
     required final DateTime updatedAt,
     required final String printerType,
+    required final bool printToChecker,
     required final int paidQuantity,
     required final String categoryId,
     required final String categoryName,
+    final double? weight,
+    final String unitId,
+    final String unitName,
+    final String unitAbbreviation,
   }) = _$OrderItemImpl;
+  const _OrderItem._() : super._();
 
   @override
   String get id;
@@ -1495,12 +1602,24 @@ abstract class _OrderItem implements OrderItem {
   @override
   String get printerType;
   @override
+  bool get printToChecker;
+  @override
   int get paidQuantity;
   @override
   String get categoryId;
   @override
   String get categoryName;
 
+  /// Angka timbangan baris ini. `null` untuk produk cacah.
+  @override
+  double? get weight;
+  @override
+  String get unitId;
+  @override
+  String get unitName;
+  @override
+  String get unitAbbreviation;
+
   /// Create a copy of OrderItem
   /// with the given fields replaced by the non-null parameter values.
   @override
@@ -1825,6 +1944,10 @@ mixin _$OrderItemRequest {
   int get unitPrice => throw _privateConstructorUsedError;
   String get notes => throw _privateConstructorUsedError;
 
+  /// Hanya diisi untuk produk `sell_by: "weight"`; produk cacah tidak boleh
+  /// mengirim berat sama sekali.
+  double? get weight => throw _privateConstructorUsedError;
+
   /// Create a copy of OrderItemRequest
   /// with the given fields replaced by the non-null parameter values.
   @JsonKey(includeFromJson: false, includeToJson: false)
@@ -1845,6 +1968,7 @@ abstract class $OrderItemRequestCopyWith<$Res> {
     int quantity,
     int unitPrice,
     String notes,
+    double? weight,
   });
 }
 
@@ -1868,6 +1992,7 @@ class _$OrderItemRequestCopyWithImpl<$Res, $Val extends OrderItemRequest>
     Object? quantity = null,
     Object? unitPrice = null,
     Object? notes = null,
+    Object? weight = freezed,
   }) {
     return _then(
       _value.copyWith(
@@ -1891,6 +2016,10 @@ class _$OrderItemRequestCopyWithImpl<$Res, $Val extends OrderItemRequest>
                 ? _value.notes
                 : notes // ignore: cast_nullable_to_non_nullable
                       as String,
+            weight: freezed == weight
+                ? _value.weight
+                : weight // ignore: cast_nullable_to_non_nullable
+                      as double?,
           )
           as $Val,
     );
@@ -1912,6 +2041,7 @@ abstract class _$$OrderItemRequestImplCopyWith<$Res>
     int quantity,
     int unitPrice,
     String notes,
+    double? weight,
   });
 }
 
@@ -1934,6 +2064,7 @@ class __$$OrderItemRequestImplCopyWithImpl<$Res>
     Object? quantity = null,
     Object? unitPrice = null,
     Object? notes = null,
+    Object? weight = freezed,
   }) {
     return _then(
       _$OrderItemRequestImpl(
@@ -1957,6 +2088,10 @@ class __$$OrderItemRequestImplCopyWithImpl<$Res>
             ? _value.notes
             : notes // ignore: cast_nullable_to_non_nullable
                   as String,
+        weight: freezed == weight
+            ? _value.weight
+            : weight // ignore: cast_nullable_to_non_nullable
+                  as double?,
       ),
     );
   }
@@ -1971,6 +2106,7 @@ class _$OrderItemRequestImpl implements _OrderItemRequest {
     required this.quantity,
     required this.unitPrice,
     required this.notes,
+    this.weight,
   });
 
   @override
@@ -1984,9 +2120,14 @@ class _$OrderItemRequestImpl implements _OrderItemRequest {
   @override
   final String notes;
 
+  /// Hanya diisi untuk produk `sell_by: "weight"`; produk cacah tidak boleh
+  /// mengirim berat sama sekali.
+  @override
+  final double? weight;
+
   @override
   String toString() {
-    return 'OrderItemRequest(productId: $productId, productVariantId: $productVariantId, quantity: $quantity, unitPrice: $unitPrice, notes: $notes)';
+    return 'OrderItemRequest(productId: $productId, productVariantId: $productVariantId, quantity: $quantity, unitPrice: $unitPrice, notes: $notes, weight: $weight)';
   }
 
   @override
@@ -2002,7 +2143,8 @@ class _$OrderItemRequestImpl implements _OrderItemRequest {
                 other.quantity == quantity) &&
             (identical(other.unitPrice, unitPrice) ||
                 other.unitPrice == unitPrice) &&
-            (identical(other.notes, notes) || other.notes == notes));
+            (identical(other.notes, notes) || other.notes == notes) &&
+            (identical(other.weight, weight) || other.weight == weight));
   }
 
   @override
@@ -2013,6 +2155,7 @@ class _$OrderItemRequestImpl implements _OrderItemRequest {
     quantity,
     unitPrice,
     notes,
+    weight,
   );
 
   /// Create a copy of OrderItemRequest
@@ -2034,6 +2177,7 @@ abstract class _OrderItemRequest implements OrderItemRequest {
     required final int quantity,
     required final int unitPrice,
     required final String notes,
+    final double? weight,
   }) = _$OrderItemRequestImpl;
 
   @override
@@ -2047,6 +2191,11 @@ abstract class _OrderItemRequest implements OrderItemRequest {
   @override
   String get notes;
 
+  /// Hanya diisi untuk produk `sell_by: "weight"`; produk cacah tidak boleh
+  /// mengirim berat sama sekali.
+  @override
+  double? get weight;
+
   /// Create a copy of OrderItemRequest
   /// with the given fields replaced by the non-null parameter values.
   @override
@@ -3426,6 +3575,9 @@ mixin _$AddItemOrderRequest {
   int get unitPrice => throw _privateConstructorUsedError;
   String get notes => throw _privateConstructorUsedError;
 
+  /// Hanya diisi untuk produk `sell_by: "weight"`.
+  double? get weight => throw _privateConstructorUsedError;
+
   /// Create a copy of AddItemOrderRequest
   /// with the given fields replaced by the non-null parameter values.
   @JsonKey(includeFromJson: false, includeToJson: false)
@@ -3446,6 +3598,7 @@ abstract class $AddItemOrderRequestCopyWith<$Res> {
     int quantity,
     int unitPrice,
     String notes,
+    double? weight,
   });
 }
 
@@ -3469,6 +3622,7 @@ class _$AddItemOrderRequestCopyWithImpl<$Res, $Val extends AddItemOrderRequest>
     Object? quantity = null,
     Object? unitPrice = null,
     Object? notes = null,
+    Object? weight = freezed,
   }) {
     return _then(
       _value.copyWith(
@@ -3492,6 +3646,10 @@ class _$AddItemOrderRequestCopyWithImpl<$Res, $Val extends AddItemOrderRequest>
                 ? _value.notes
                 : notes // ignore: cast_nullable_to_non_nullable
                       as String,
+            weight: freezed == weight
+                ? _value.weight
+                : weight // ignore: cast_nullable_to_non_nullable
+                      as double?,
           )
           as $Val,
     );
@@ -3513,6 +3671,7 @@ abstract class _$$AddItemOrderRequestImplCopyWith<$Res>
     int quantity,
     int unitPrice,
     String notes,
+    double? weight,
   });
 }
 
@@ -3535,6 +3694,7 @@ class __$$AddItemOrderRequestImplCopyWithImpl<$Res>
     Object? quantity = null,
     Object? unitPrice = null,
     Object? notes = null,
+    Object? weight = freezed,
   }) {
     return _then(
       _$AddItemOrderRequestImpl(
@@ -3558,6 +3718,10 @@ class __$$AddItemOrderRequestImplCopyWithImpl<$Res>
             ? _value.notes
             : notes // ignore: cast_nullable_to_non_nullable
                   as String,
+        weight: freezed == weight
+            ? _value.weight
+            : weight // ignore: cast_nullable_to_non_nullable
+                  as double?,
       ),
     );
   }
@@ -3572,6 +3736,7 @@ class _$AddItemOrderRequestImpl implements _AddItemOrderRequest {
     required this.quantity,
     required this.unitPrice,
     required this.notes,
+    this.weight,
   });
 
   @override
@@ -3585,9 +3750,13 @@ class _$AddItemOrderRequestImpl implements _AddItemOrderRequest {
   @override
   final String notes;
 
+  /// Hanya diisi untuk produk `sell_by: "weight"`.
+  @override
+  final double? weight;
+
   @override
   String toString() {
-    return 'AddItemOrderRequest(productId: $productId, productVariantId: $productVariantId, quantity: $quantity, unitPrice: $unitPrice, notes: $notes)';
+    return 'AddItemOrderRequest(productId: $productId, productVariantId: $productVariantId, quantity: $quantity, unitPrice: $unitPrice, notes: $notes, weight: $weight)';
   }
 
   @override
@@ -3603,7 +3772,8 @@ class _$AddItemOrderRequestImpl implements _AddItemOrderRequest {
                 other.quantity == quantity) &&
             (identical(other.unitPrice, unitPrice) ||
                 other.unitPrice == unitPrice) &&
-            (identical(other.notes, notes) || other.notes == notes));
+            (identical(other.notes, notes) || other.notes == notes) &&
+            (identical(other.weight, weight) || other.weight == weight));
   }
 
   @override
@@ -3614,6 +3784,7 @@ class _$AddItemOrderRequestImpl implements _AddItemOrderRequest {
     quantity,
     unitPrice,
     notes,
+    weight,
   );
 
   /// Create a copy of AddItemOrderRequest
@@ -3635,6 +3806,7 @@ abstract class _AddItemOrderRequest implements AddItemOrderRequest {
     required final int quantity,
     required final int unitPrice,
     required final String notes,
+    final double? weight,
   }) = _$AddItemOrderRequestImpl;
 
   @override
@@ -3648,6 +3820,10 @@ abstract class _AddItemOrderRequest implements AddItemOrderRequest {
   @override
   String get notes;
 
+  /// Hanya diisi untuk produk `sell_by: "weight"`.
+  @override
+  double? get weight;
+
   /// Create a copy of AddItemOrderRequest
   /// with the given fields replaced by the non-null parameter values.
   @override

lib/domain/order/repositories/i_order_repository.dart

@@ -24,10 +24,12 @@ abstract class IOrderRepository {
   Future<Either<OrderFailure, Order>> addItemOrder({
     required String id,
     required List<AddItemOrderRequest> request,
+    String? idempotencyKey,
   });
 
   Future<Either<OrderFailure, Payment>> createPayment({
     required PaymentRequest request,
+    String? idempotencyKey,
   });
 
   Future<Either<OrderFailure, Unit>> voidOrder({
@@ -35,15 +37,18 @@ abstract class IOrderRepository {
     required String reason,
     String type = "ITEM", // TYPE: ALL, ITEM
     required List<OrderItem> orderItems,
+    String? idempotencyKey,
   });
 
   Future<Either<OrderFailure, Payment>> createSplitBill(
-    PaymentSplitBillRequest request,
+    PaymentSplitBillRequest request, {
-  );
+    String? idempotencyKey,
+  });
 
   Future<Either<OrderFailure, Unit>> refundOrder({
     required String id,
     required String reason,
     required int refundAmount,
+    String? idempotencyKey,
   });
 }

lib/domain/printer/entities/print_station_result.dart

@@ -0,0 +1,83 @@
+part of '../printer.dart';
+
+/// Satu tujuan cetak dalam sekali proses print.
+///
+/// Perhatikan kasir, void, dan split bill sengaja menumpang printer `receipt`
+/// — ketiganya tidak punya printer sendiri di halaman pengaturan.
+enum PrintStation {
+  receipt,
+  cashier,
+  checker,
+  kitchen,
+  bar,
+  voided,
+  splitBill;
+
+  String get label => switch (this) {
+    PrintStation.receipt => 'Struk Customer',
+    PrintStation.cashier => 'Struk Kasir',
+    PrintStation.checker => 'Checker',
+    PrintStation.kitchen => 'Kitchen',
+    PrintStation.bar => 'Bar',
+    PrintStation.voided => 'Struk Void',
+    PrintStation.splitBill => 'Struk Split Bill',
+  };
+
+  /// Kode printer di tabel `printers`.
+  String get printerCode => switch (this) {
+    PrintStation.receipt ||
+    PrintStation.cashier ||
+    PrintStation.voided ||
+    PrintStation.splitBill => 'receipt',
+    PrintStation.checker => 'checker',
+    PrintStation.kitchen => 'kitchen',
+    PrintStation.bar => 'bar',
+  };
+
+  /// Station yang hanya mencetak item dengan `printerType` tertentu.
+  /// Station lain mencetak seluruh item order.
+  String? get itemPrinterType => switch (this) {
+    PrintStation.kitchen => 'kitchen',
+    PrintStation.bar => 'bar',
+    _ => null,
+  };
+
+}
+
+enum PrintStationStatus {
+  /// Belum dijalankan.
+  pending,
+
+  /// Sedang dikirim ke printer.
+  printing,
+
+  /// Berhasil dicetak.
+  success,
+
+  /// Gagal — lihat `message`.
+  failed,
+
+  /// Sengaja dilewati, misal tidak ada item untuk station tersebut.
+  /// Ini bukan kegagalan dan tidak perlu dicetak ulang.
+  skipped,
+}
+
+@freezed
+class PrintStationResult with _$PrintStationResult {
+  const PrintStationResult._();
+
+  const factory PrintStationResult({
+    required PrintStation station,
+    required PrintStationStatus status,
+    String? message,
+    @Default(Duration.zero) Duration elapsed,
+  }) = _PrintStationResult;
+
+  factory PrintStationResult.pending(PrintStation station) =>
+      PrintStationResult(station: station, status: PrintStationStatus.pending);
+
+  bool get isSuccess => status == PrintStationStatus.success;
+  bool get isFailed => status == PrintStationStatus.failed;
+  bool get isSkipped => status == PrintStationStatus.skipped;
+  bool get isFinished => isSuccess || isFailed || isSkipped;
+}

lib/domain/printer/printer.dart

@@ -9,5 +9,6 @@ import '../order/order.dart';
 part 'printer.freezed.dart';
 
 part 'entities/printer_entity.dart';
+part 'entities/print_station_result.dart';
 part 'failures/printer_failure.dart';
 part 'repositories/i_printer_repository.dart';

lib/domain/printer/printer.freezed.dart

@@ -307,6 +307,216 @@ abstract class _Printer implements Printer {
       throw _privateConstructorUsedError;
 }
 
+/// @nodoc
+mixin _$PrintStationResult {
+  PrintStation get station => throw _privateConstructorUsedError;
+  PrintStationStatus get status => throw _privateConstructorUsedError;
+  String? get message => throw _privateConstructorUsedError;
+  Duration get elapsed => throw _privateConstructorUsedError;
+
+  /// Create a copy of PrintStationResult
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  $PrintStationResultCopyWith<PrintStationResult> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
+/// @nodoc
+abstract class $PrintStationResultCopyWith<$Res> {
+  factory $PrintStationResultCopyWith(
+    PrintStationResult value,
+    $Res Function(PrintStationResult) then,
+  ) = _$PrintStationResultCopyWithImpl<$Res, PrintStationResult>;
+  @useResult
+  $Res call({
+    PrintStation station,
+    PrintStationStatus status,
+    String? message,
+    Duration elapsed,
+  });
+}
+
+/// @nodoc
+class _$PrintStationResultCopyWithImpl<$Res, $Val extends PrintStationResult>
+    implements $PrintStationResultCopyWith<$Res> {
+  _$PrintStationResultCopyWithImpl(this._value, this._then);
+
+  // ignore: unused_field
+  final $Val _value;
+  // ignore: unused_field
+  final $Res Function($Val) _then;
+
+  /// Create a copy of PrintStationResult
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? station = null,
+    Object? status = null,
+    Object? message = freezed,
+    Object? elapsed = null,
+  }) {
+    return _then(
+      _value.copyWith(
+            station: null == station
+                ? _value.station
+                : station // ignore: cast_nullable_to_non_nullable
+                      as PrintStation,
+            status: null == status
+                ? _value.status
+                : status // ignore: cast_nullable_to_non_nullable
+                      as PrintStationStatus,
+            message: freezed == message
+                ? _value.message
+                : message // ignore: cast_nullable_to_non_nullable
+                      as String?,
+            elapsed: null == elapsed
+                ? _value.elapsed
+                : elapsed // ignore: cast_nullable_to_non_nullable
+                      as Duration,
+          )
+          as $Val,
+    );
+  }
+}
+
+/// @nodoc
+abstract class _$$PrintStationResultImplCopyWith<$Res>
+    implements $PrintStationResultCopyWith<$Res> {
+  factory _$$PrintStationResultImplCopyWith(
+    _$PrintStationResultImpl value,
+    $Res Function(_$PrintStationResultImpl) then,
+  ) = __$$PrintStationResultImplCopyWithImpl<$Res>;
+  @override
+  @useResult
+  $Res call({
+    PrintStation station,
+    PrintStationStatus status,
+    String? message,
+    Duration elapsed,
+  });
+}
+
+/// @nodoc
+class __$$PrintStationResultImplCopyWithImpl<$Res>
+    extends _$PrintStationResultCopyWithImpl<$Res, _$PrintStationResultImpl>
+    implements _$$PrintStationResultImplCopyWith<$Res> {
+  __$$PrintStationResultImplCopyWithImpl(
+    _$PrintStationResultImpl _value,
+    $Res Function(_$PrintStationResultImpl) _then,
+  ) : super(_value, _then);
+
+  /// Create a copy of PrintStationResult
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? station = null,
+    Object? status = null,
+    Object? message = freezed,
+    Object? elapsed = null,
+  }) {
+    return _then(
+      _$PrintStationResultImpl(
+        station: null == station
+            ? _value.station
+            : station // ignore: cast_nullable_to_non_nullable
+                  as PrintStation,
+        status: null == status
+            ? _value.status
+            : status // ignore: cast_nullable_to_non_nullable
+                  as PrintStationStatus,
+        message: freezed == message
+            ? _value.message
+            : message // ignore: cast_nullable_to_non_nullable
+                  as String?,
+        elapsed: null == elapsed
+            ? _value.elapsed
+            : elapsed // ignore: cast_nullable_to_non_nullable
+                  as Duration,
+      ),
+    );
+  }
+}
+
+/// @nodoc
+
+class _$PrintStationResultImpl extends _PrintStationResult {
+  const _$PrintStationResultImpl({
+    required this.station,
+    required this.status,
+    this.message,
+    this.elapsed = Duration.zero,
+  }) : super._();
+
+  @override
+  final PrintStation station;
+  @override
+  final PrintStationStatus status;
+  @override
+  final String? message;
+  @override
+  @JsonKey()
+  final Duration elapsed;
+
+  @override
+  String toString() {
+    return 'PrintStationResult(station: $station, status: $status, message: $message, elapsed: $elapsed)';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    return identical(this, other) ||
+        (other.runtimeType == runtimeType &&
+            other is _$PrintStationResultImpl &&
+            (identical(other.station, station) || other.station == station) &&
+            (identical(other.status, status) || other.status == status) &&
+            (identical(other.message, message) || other.message == message) &&
+            (identical(other.elapsed, elapsed) || other.elapsed == elapsed));
+  }
+
+  @override
+  int get hashCode =>
+      Object.hash(runtimeType, station, status, message, elapsed);
+
+  /// Create a copy of PrintStationResult
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  @pragma('vm:prefer-inline')
+  _$$PrintStationResultImplCopyWith<_$PrintStationResultImpl> get copyWith =>
+      __$$PrintStationResultImplCopyWithImpl<_$PrintStationResultImpl>(
+        this,
+        _$identity,
+      );
+}
+
+abstract class _PrintStationResult extends PrintStationResult {
+  const factory _PrintStationResult({
+    required final PrintStation station,
+    required final PrintStationStatus status,
+    final String? message,
+    final Duration elapsed,
+  }) = _$PrintStationResultImpl;
+  const _PrintStationResult._() : super._();
+
+  @override
+  PrintStation get station;
+  @override
+  PrintStationStatus get status;
+  @override
+  String? get message;
+  @override
+  Duration get elapsed;
+
+  /// Create a copy of PrintStationResult
+  /// with the given fields replaced by the non-null parameter values.
+  @override
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  _$$PrintStationResultImplCopyWith<_$PrintStationResultImpl> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
 /// @nodoc
 mixin _$PrinterFailure {
   @optionalTypeArgs

lib/domain/printer/repositories/i_printer_repository.dart

@@ -15,25 +15,17 @@ abstract class IPrinterRepository {
     List<int> printValue,
   );
 
-  Future<Either<PrinterFailure, Unit>> printStruckOrder({required Order order});
+  /// Mencetak [stations] untuk [order], melaporkan status tiap station.
-  Future<Either<PrinterFailure, Unit>> printStruckSaveOrder({
+  ///
-    required Order order,
+  /// Setiap emit berisi daftar lengkap semua station, jadi UI cukup
-  });
+  /// menggambar ulang apa adanya.
-  Future<Either<PrinterFailure, Unit>> printStruckCashier({
+  ///
-    required Order order,
+  /// Satu station yang gagal **tidak** membatalkan station lainnya — semuanya
-  });
+  /// tetap dicoba. Station Bluetooth dijalankan berurutan karena radionya
-  Future<Either<PrinterFailure, Unit>> printStruckPayment({
+  /// hanya satu, station Network dijalankan paralel karena tidak berebut
-    required Order order,
+  /// sumber daya dengan Bluetooth.
-  });
+  Stream<List<PrintStationResult>> printStations({
-  Future<Either<PrinterFailure, Unit>> printStruckChecker({
-    required Order order,
-  });
-  Future<Either<PrinterFailure, Unit>> printStruckKitchen({
-    required Order order,
-  });
-  Future<Either<PrinterFailure, Unit>> printStruckBar({required Order order});
-  Future<Either<PrinterFailure, Unit>> printStruckVoid({required Order order});
-  Future<Either<PrinterFailure, Unit>> printStruckSplitBill({
     required Order order,
+    required List<PrintStation> stations,
   });
 }

lib/domain/product/entities/product_entity.dart

@@ -21,6 +21,8 @@ class ListProduct with _$ListProduct {
 
 @freezed
 class Product with _$Product {
+  const Product._();
+
   const factory Product({
     required String id,
     required String organizationId,
@@ -33,11 +35,17 @@ class Product with _$Product {
     required String businessType,
     required String imageUrl,
     required String printerType,
+    required bool printToChecker,
     required Map<String, dynamic> metadata,
     required bool isActive,
     required String createdAt,
     required String updatedAt,
     required List<ProductVariant> variants,
+    /// `unit` (default) atau `weight`. Lihat [SellBy].
+    @Default(SellBy.unit) String sellBy,
+    @Default('') String unitId,
+    @Default('') String unitName,
+    @Default('') String unitAbbreviation,
   }) = _Product;
 
   factory Product.empty() => const Product(
@@ -52,12 +60,25 @@ class Product with _$Product {
     businessType: '',
     imageUrl: '',
     printerType: '',
+    printToChecker: false,
     metadata: {},
     isActive: false,
     createdAt: '',
     updatedAt: '',
     variants: [],
   );
+
+  /// Produk yang dijual per timbangan: `quantity` selalu 1, `weight` wajib.
+  bool get isSoldByWeight => SellBy.isWeight(sellBy);
+
+  /// Singkatan satuan untuk ditampilkan — `ons`. Jatuh ke nama panjang bila
+  /// backend hanya mengirim itu.
+  String get unitLabel =>
+      unitAbbreviation.isNotEmpty ? unitAbbreviation : unitName;
+
+  /// Label harga mengikuti satuan: "Harga per ons".
+  String get priceUnitLabel =>
+      isSoldByWeight && unitLabel.isNotEmpty ? 'per $unitLabel' : '';
 }
 
 @freezed

lib/domain/product/entities/product_quantity_entity.dart

@@ -1,14 +1,53 @@
 part of '../product.dart';
 
+/// Satu baris keranjang.
+///
+/// Untuk produk timbangan, **satu penimbangan = satu baris**: dua kali menimbang
+/// Ikan Tude menghasilkan dua baris terpisah dengan [quantity] 1 dan [weight]
+/// masing-masing. Karena itu baris dibedakan lewat [lineId], bukan lewat
+/// kombinasi produk + varian.
 @freezed
 class ProductQuantity with _$ProductQuantity {
+  const ProductQuantity._();
+
   const factory ProductQuantity({
     required Product product,
     ProductVariant? variant,
     required int quantity,
     required String notes,
+    @Default('') String lineId,
+
+    /// Angka timbangan dalam satuan produk. `null` untuk produk cacah.
+    double? weight,
   }) = _ProductQuantity;
 
   factory ProductQuantity.empty() =>
       ProductQuantity(product: Product.empty(), quantity: 0, notes: '');
+
+  bool get isWeighted => weight != null;
+
+  double get unitPrice => product.price + (variant?.priceModifier ?? 0);
+
+  /// Harga baris: `weight × unit_price` untuk timbangan, `quantity × unit_price`
+  /// untuk produk cacah.
+  double get lineTotal =>
+      isWeighted ? unitPrice * weight! : unitPrice * quantity;
+
+  /// `4,2 ons` atau `2` — dipakai di kolom Qty keranjang.
+  String get quantityLabel {
+    if (!isWeighted) return quantity.toString();
+    final label = product.unitLabel;
+    final value = weight!.weightFormat;
+    return label.isEmpty ? value : '$value $label';
+  }
+}
+
+extension ProductQuantityListExt on List<ProductQuantity> {
+  /// Total keranjang: baris berbobot pakai `weight × harga`, baris cacah pakai
+  /// `quantity × harga`.
+  double get cartTotal => fold<double>(0, (sum, item) => sum + item.lineTotal);
+
+  /// Baris berbobot dihitung satu — satu penimbangan, satu barang.
+  int get cartItemCount =>
+      fold<int>(0, (sum, item) => sum + (item.isWeighted ? 1 : item.quantity));
 }

lib/domain/product/product.dart

@@ -3,6 +3,8 @@ import 'package:flutter/foundation.dart';
 import 'package:freezed_annotation/freezed_annotation.dart';
 
 import '../../common/api/api_failure.dart';
+import '../../common/extension/extension.dart';
+import '../../common/types/sell_by.dart';
 
 part 'product.freezed.dart';
 

lib/domain/product/product.freezed.dart

@@ -279,12 +279,19 @@ mixin _$Product {
   String get businessType => throw _privateConstructorUsedError;
   String get imageUrl => throw _privateConstructorUsedError;
   String get printerType => throw _privateConstructorUsedError;
+  bool get printToChecker => throw _privateConstructorUsedError;
   Map<String, dynamic> get metadata => throw _privateConstructorUsedError;
   bool get isActive => throw _privateConstructorUsedError;
   String get createdAt => throw _privateConstructorUsedError;
   String get updatedAt => throw _privateConstructorUsedError;
   List<ProductVariant> get variants => throw _privateConstructorUsedError;
 
+  /// `unit` (default) atau `weight`. Lihat [SellBy].
+  String get sellBy => throw _privateConstructorUsedError;
+  String get unitId => throw _privateConstructorUsedError;
+  String get unitName => throw _privateConstructorUsedError;
+  String get unitAbbreviation => throw _privateConstructorUsedError;
+
   /// Create a copy of Product
   /// with the given fields replaced by the non-null parameter values.
   @JsonKey(includeFromJson: false, includeToJson: false)
@@ -308,11 +315,16 @@ abstract class $ProductCopyWith<$Res> {
     String businessType,
     String imageUrl,
     String printerType,
+    bool printToChecker,
     Map<String, dynamic> metadata,
     bool isActive,
     String createdAt,
     String updatedAt,
     List<ProductVariant> variants,
+    String sellBy,
+    String unitId,
+    String unitName,
+    String unitAbbreviation,
   });
 }
 
@@ -342,11 +354,16 @@ class _$ProductCopyWithImpl<$Res, $Val extends Product>
     Object? businessType = null,
     Object? imageUrl = null,
     Object? printerType = null,
+    Object? printToChecker = null,
     Object? metadata = null,
     Object? isActive = null,
     Object? createdAt = null,
     Object? updatedAt = null,
     Object? variants = null,
+    Object? sellBy = null,
+    Object? unitId = null,
+    Object? unitName = null,
+    Object? unitAbbreviation = null,
   }) {
     return _then(
       _value.copyWith(
@@ -394,6 +411,10 @@ class _$ProductCopyWithImpl<$Res, $Val extends Product>
                 ? _value.printerType
                 : printerType // ignore: cast_nullable_to_non_nullable
                       as String,
+            printToChecker: null == printToChecker
+                ? _value.printToChecker
+                : printToChecker // ignore: cast_nullable_to_non_nullable
+                      as bool,
             metadata: null == metadata
                 ? _value.metadata
                 : metadata // ignore: cast_nullable_to_non_nullable
@@ -414,6 +435,22 @@ class _$ProductCopyWithImpl<$Res, $Val extends Product>
                 ? _value.variants
                 : variants // ignore: cast_nullable_to_non_nullable
                       as List<ProductVariant>,
+            sellBy: null == sellBy
+                ? _value.sellBy
+                : sellBy // ignore: cast_nullable_to_non_nullable
+                      as String,
+            unitId: null == unitId
+                ? _value.unitId
+                : unitId // ignore: cast_nullable_to_non_nullable
+                      as String,
+            unitName: null == unitName
+                ? _value.unitName
+                : unitName // ignore: cast_nullable_to_non_nullable
+                      as String,
+            unitAbbreviation: null == unitAbbreviation
+                ? _value.unitAbbreviation
+                : unitAbbreviation // ignore: cast_nullable_to_non_nullable
+                      as String,
           )
           as $Val,
     );
@@ -440,11 +477,16 @@ abstract class _$$ProductImplCopyWith<$Res> implements $ProductCopyWith<$Res> {
     String businessType,
     String imageUrl,
     String printerType,
+    bool printToChecker,
     Map<String, dynamic> metadata,
     bool isActive,
     String createdAt,
     String updatedAt,
     List<ProductVariant> variants,
+    String sellBy,
+    String unitId,
+    String unitName,
+    String unitAbbreviation,
   });
 }
 
@@ -473,11 +515,16 @@ class __$$ProductImplCopyWithImpl<$Res>
     Object? businessType = null,
     Object? imageUrl = null,
     Object? printerType = null,
+    Object? printToChecker = null,
     Object? metadata = null,
     Object? isActive = null,
     Object? createdAt = null,
     Object? updatedAt = null,
     Object? variants = null,
+    Object? sellBy = null,
+    Object? unitId = null,
+    Object? unitName = null,
+    Object? unitAbbreviation = null,
   }) {
     return _then(
       _$ProductImpl(
@@ -525,6 +572,10 @@ class __$$ProductImplCopyWithImpl<$Res>
             ? _value.printerType
             : printerType // ignore: cast_nullable_to_non_nullable
                   as String,
+        printToChecker: null == printToChecker
+            ? _value.printToChecker
+            : printToChecker // ignore: cast_nullable_to_non_nullable
+                  as bool,
         metadata: null == metadata
             ? _value._metadata
             : metadata // ignore: cast_nullable_to_non_nullable
@@ -545,6 +596,22 @@ class __$$ProductImplCopyWithImpl<$Res>
             ? _value._variants
             : variants // ignore: cast_nullable_to_non_nullable
                   as List<ProductVariant>,
+        sellBy: null == sellBy
+            ? _value.sellBy
+            : sellBy // ignore: cast_nullable_to_non_nullable
+                  as String,
+        unitId: null == unitId
+            ? _value.unitId
+            : unitId // ignore: cast_nullable_to_non_nullable
+                  as String,
+        unitName: null == unitName
+            ? _value.unitName
+            : unitName // ignore: cast_nullable_to_non_nullable
+                  as String,
+        unitAbbreviation: null == unitAbbreviation
+            ? _value.unitAbbreviation
+            : unitAbbreviation // ignore: cast_nullable_to_non_nullable
+                  as String,
       ),
     );
   }
@@ -552,7 +619,7 @@ class __$$ProductImplCopyWithImpl<$Res>
 
 /// @nodoc
 
-class _$ProductImpl with DiagnosticableTreeMixin implements _Product {
+class _$ProductImpl extends _Product with DiagnosticableTreeMixin {
   const _$ProductImpl({
     required this.id,
     required this.organizationId,
@@ -565,13 +632,19 @@ class _$ProductImpl with DiagnosticableTreeMixin implements _Product {
     required this.businessType,
     required this.imageUrl,
     required this.printerType,
+    required this.printToChecker,
     required final Map<String, dynamic> metadata,
     required this.isActive,
     required this.createdAt,
     required this.updatedAt,
     required final List<ProductVariant> variants,
+    this.sellBy = SellBy.unit,
+    this.unitId = '',
+    this.unitName = '',
+    this.unitAbbreviation = '',
   }) : _metadata = metadata,
-       _variants = variants;
+       _variants = variants,
+       super._();
 
   @override
   final String id;
@@ -595,6 +668,8 @@ class _$ProductImpl with DiagnosticableTreeMixin implements _Product {
   final String imageUrl;
   @override
   final String printerType;
+  @override
+  final bool printToChecker;
   final Map<String, dynamic> _metadata;
   @override
   Map<String, dynamic> get metadata {
@@ -617,9 +692,23 @@ class _$ProductImpl with DiagnosticableTreeMixin implements _Product {
     return EqualUnmodifiableListView(_variants);
   }
 
+  /// `unit` (default) atau `weight`. Lihat [SellBy].
+  @override
+  @JsonKey()
+  final String sellBy;
+  @override
+  @JsonKey()
+  final String unitId;
+  @override
+  @JsonKey()
+  final String unitName;
+  @override
+  @JsonKey()
+  final String unitAbbreviation;
+
   @override
   String toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) {
-    return 'Product(id: $id, organizationId: $organizationId, categoryId: $categoryId, sku: $sku, name: $name, description: $description, price: $price, cost: $cost, businessType: $businessType, imageUrl: $imageUrl, printerType: $printerType, metadata: $metadata, isActive: $isActive, createdAt: $createdAt, updatedAt: $updatedAt, variants: $variants)';
+    return 'Product(id: $id, organizationId: $organizationId, categoryId: $categoryId, sku: $sku, name: $name, description: $description, price: $price, cost: $cost, businessType: $businessType, imageUrl: $imageUrl, printerType: $printerType, printToChecker: $printToChecker, metadata: $metadata, isActive: $isActive, createdAt: $createdAt, updatedAt: $updatedAt, variants: $variants, sellBy: $sellBy, unitId: $unitId, unitName: $unitName, unitAbbreviation: $unitAbbreviation)';
   }
 
   @override
@@ -638,11 +727,16 @@ class _$ProductImpl with DiagnosticableTreeMixin implements _Product {
       ..add(DiagnosticsProperty('businessType', businessType))
       ..add(DiagnosticsProperty('imageUrl', imageUrl))
       ..add(DiagnosticsProperty('printerType', printerType))
+      ..add(DiagnosticsProperty('printToChecker', printToChecker))
       ..add(DiagnosticsProperty('metadata', metadata))
       ..add(DiagnosticsProperty('isActive', isActive))
       ..add(DiagnosticsProperty('createdAt', createdAt))
       ..add(DiagnosticsProperty('updatedAt', updatedAt))
-      ..add(DiagnosticsProperty('variants', variants));
+      ..add(DiagnosticsProperty('variants', variants))
+      ..add(DiagnosticsProperty('sellBy', sellBy))
+      ..add(DiagnosticsProperty('unitId', unitId))
+      ..add(DiagnosticsProperty('unitName', unitName))
+      ..add(DiagnosticsProperty('unitAbbreviation', unitAbbreviation));
   }
 
   @override
@@ -667,6 +761,8 @@ class _$ProductImpl with DiagnosticableTreeMixin implements _Product {
                 other.imageUrl == imageUrl) &&
             (identical(other.printerType, printerType) ||
                 other.printerType == printerType) &&
+            (identical(other.printToChecker, printToChecker) ||
+                other.printToChecker == printToChecker) &&
             const DeepCollectionEquality().equals(other._metadata, _metadata) &&
             (identical(other.isActive, isActive) ||
                 other.isActive == isActive) &&
@@ -674,11 +770,17 @@ class _$ProductImpl with DiagnosticableTreeMixin implements _Product {
                 other.createdAt == createdAt) &&
             (identical(other.updatedAt, updatedAt) ||
                 other.updatedAt == updatedAt) &&
-            const DeepCollectionEquality().equals(other._variants, _variants));
+            const DeepCollectionEquality().equals(other._variants, _variants) &&
+            (identical(other.sellBy, sellBy) || other.sellBy == sellBy) &&
+            (identical(other.unitId, unitId) || other.unitId == unitId) &&
+            (identical(other.unitName, unitName) ||
+                other.unitName == unitName) &&
+            (identical(other.unitAbbreviation, unitAbbreviation) ||
+                other.unitAbbreviation == unitAbbreviation));
   }
 
   @override
-  int get hashCode => Object.hash(
+  int get hashCode => Object.hashAll([
     runtimeType,
     id,
     organizationId,
@@ -691,12 +793,17 @@ class _$ProductImpl with DiagnosticableTreeMixin implements _Product {
     businessType,
     imageUrl,
     printerType,
+    printToChecker,
     const DeepCollectionEquality().hash(_metadata),
     isActive,
     createdAt,
     updatedAt,
     const DeepCollectionEquality().hash(_variants),
-  );
+    sellBy,
+    unitId,
+    unitName,
+    unitAbbreviation,
+  ]);
 
   /// Create a copy of Product
   /// with the given fields replaced by the non-null parameter values.
@@ -707,7 +814,7 @@ class _$ProductImpl with DiagnosticableTreeMixin implements _Product {
       __$$ProductImplCopyWithImpl<_$ProductImpl>(this, _$identity);
 }
 
-abstract class _Product implements Product {
+abstract class _Product extends Product {
   const factory _Product({
     required final String id,
     required final String organizationId,
@@ -720,12 +827,18 @@ abstract class _Product implements Product {
     required final String businessType,
     required final String imageUrl,
     required final String printerType,
+    required final bool printToChecker,
     required final Map<String, dynamic> metadata,
     required final bool isActive,
     required final String createdAt,
     required final String updatedAt,
     required final List<ProductVariant> variants,
+    final String sellBy,
+    final String unitId,
+    final String unitName,
+    final String unitAbbreviation,
   }) = _$ProductImpl;
+  const _Product._() : super._();
 
   @override
   String get id;
@@ -750,6 +863,8 @@ abstract class _Product implements Product {
   @override
   String get printerType;
   @override
+  bool get printToChecker;
+  @override
   Map<String, dynamic> get metadata;
   @override
   bool get isActive;
@@ -760,6 +875,16 @@ abstract class _Product implements Product {
   @override
   List<ProductVariant> get variants;
 
+  /// `unit` (default) atau `weight`. Lihat [SellBy].
+  @override
+  String get sellBy;
+  @override
+  String get unitId;
+  @override
+  String get unitName;
+  @override
+  String get unitAbbreviation;
+
   /// Create a copy of Product
   /// with the given fields replaced by the non-null parameter values.
   @override
@@ -1098,6 +1223,10 @@ mixin _$ProductQuantity {
   ProductVariant? get variant => throw _privateConstructorUsedError;
   int get quantity => throw _privateConstructorUsedError;
   String get notes => throw _privateConstructorUsedError;
+  String get lineId => throw _privateConstructorUsedError;
+
+  /// Angka timbangan dalam satuan produk. `null` untuk produk cacah.
+  double? get weight => throw _privateConstructorUsedError;
 
   /// Create a copy of ProductQuantity
   /// with the given fields replaced by the non-null parameter values.
@@ -1118,6 +1247,8 @@ abstract class $ProductQuantityCopyWith<$Res> {
     ProductVariant? variant,
     int quantity,
     String notes,
+    String lineId,
+    double? weight,
   });
 
   $ProductCopyWith<$Res> get product;
@@ -1143,6 +1274,8 @@ class _$ProductQuantityCopyWithImpl<$Res, $Val extends ProductQuantity>
     Object? variant = freezed,
     Object? quantity = null,
     Object? notes = null,
+    Object? lineId = null,
+    Object? weight = freezed,
   }) {
     return _then(
       _value.copyWith(
@@ -1162,6 +1295,14 @@ class _$ProductQuantityCopyWithImpl<$Res, $Val extends ProductQuantity>
                 ? _value.notes
                 : notes // ignore: cast_nullable_to_non_nullable
                       as String,
+            lineId: null == lineId
+                ? _value.lineId
+                : lineId // ignore: cast_nullable_to_non_nullable
+                      as String,
+            weight: freezed == weight
+                ? _value.weight
+                : weight // ignore: cast_nullable_to_non_nullable
+                      as double?,
           )
           as $Val,
     );
@@ -1206,6 +1347,8 @@ abstract class _$$ProductQuantityImplCopyWith<$Res>
     ProductVariant? variant,
     int quantity,
     String notes,
+    String lineId,
+    double? weight,
   });
 
   @override
@@ -1232,6 +1375,8 @@ class __$$ProductQuantityImplCopyWithImpl<$Res>
     Object? variant = freezed,
     Object? quantity = null,
     Object? notes = null,
+    Object? lineId = null,
+    Object? weight = freezed,
   }) {
     return _then(
       _$ProductQuantityImpl(
@@ -1251,6 +1396,14 @@ class __$$ProductQuantityImplCopyWithImpl<$Res>
             ? _value.notes
             : notes // ignore: cast_nullable_to_non_nullable
                   as String,
+        lineId: null == lineId
+            ? _value.lineId
+            : lineId // ignore: cast_nullable_to_non_nullable
+                  as String,
+        weight: freezed == weight
+            ? _value.weight
+            : weight // ignore: cast_nullable_to_non_nullable
+                  as double?,
       ),
     );
   }
@@ -1258,15 +1411,16 @@ class __$$ProductQuantityImplCopyWithImpl<$Res>
 
 /// @nodoc
 
-class _$ProductQuantityImpl
+class _$ProductQuantityImpl extends _ProductQuantity
-    with DiagnosticableTreeMixin
+    with DiagnosticableTreeMixin {
-    implements _ProductQuantity {
   const _$ProductQuantityImpl({
     required this.product,
     this.variant,
     required this.quantity,
     required this.notes,
-  });
+    this.lineId = '',
+    this.weight,
+  }) : super._();
 
   @override
   final Product product;
@@ -1276,10 +1430,17 @@ class _$ProductQuantityImpl
   final int quantity;
   @override
   final String notes;
+  @override
+  @JsonKey()
+  final String lineId;
+
+  /// Angka timbangan dalam satuan produk. `null` untuk produk cacah.
+  @override
+  final double? weight;
 
   @override
   String toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) {
-    return 'ProductQuantity(product: $product, variant: $variant, quantity: $quantity, notes: $notes)';
+    return 'ProductQuantity(product: $product, variant: $variant, quantity: $quantity, notes: $notes, lineId: $lineId, weight: $weight)';
   }
 
   @override
@@ -1290,7 +1451,9 @@ class _$ProductQuantityImpl
       ..add(DiagnosticsProperty('product', product))
       ..add(DiagnosticsProperty('variant', variant))
       ..add(DiagnosticsProperty('quantity', quantity))
-      ..add(DiagnosticsProperty('notes', notes));
+      ..add(DiagnosticsProperty('notes', notes))
+      ..add(DiagnosticsProperty('lineId', lineId))
+      ..add(DiagnosticsProperty('weight', weight));
   }
 
   @override
@@ -1302,12 +1465,21 @@ class _$ProductQuantityImpl
             (identical(other.variant, variant) || other.variant == variant) &&
             (identical(other.quantity, quantity) ||
                 other.quantity == quantity) &&
-            (identical(other.notes, notes) || other.notes == notes));
+            (identical(other.notes, notes) || other.notes == notes) &&
+            (identical(other.lineId, lineId) || other.lineId == lineId) &&
+            (identical(other.weight, weight) || other.weight == weight));
   }
 
   @override
-  int get hashCode =>
+  int get hashCode => Object.hash(
-      Object.hash(runtimeType, product, variant, quantity, notes);
+    runtimeType,
+    product,
+    variant,
+    quantity,
+    notes,
+    lineId,
+    weight,
+  );
 
   /// Create a copy of ProductQuantity
   /// with the given fields replaced by the non-null parameter values.
@@ -1321,13 +1493,16 @@ class _$ProductQuantityImpl
       );
 }
 
-abstract class _ProductQuantity implements ProductQuantity {
+abstract class _ProductQuantity extends ProductQuantity {
   const factory _ProductQuantity({
     required final Product product,
     final ProductVariant? variant,
     required final int quantity,
     required final String notes,
+    final String lineId,
+    final double? weight,
   }) = _$ProductQuantityImpl;
+  const _ProductQuantity._() : super._();
 
   @override
   Product get product;
@@ -1337,6 +1512,12 @@ abstract class _ProductQuantity implements ProductQuantity {
   int get quantity;
   @override
   String get notes;
+  @override
+  String get lineId;
+
+  /// Angka timbangan dalam satuan produk. `null` untuk produk cacah.
+  @override
+  double? get weight;
 
   /// Create a copy of ProductQuantity
   /// with the given fields replaced by the non-null parameter values.

lib/domain/unit/entities/unit_entity.dart

@@ -0,0 +1,23 @@
+part of '../unit.dart';
+
+/// Satuan timbangan milik organisasi — ons, kg, gram.
+///
+/// [abbreviation] yang dipakai POS untuk mencetak `4,2 ons` di struk.
+@freezed
+class ProductUnit with _$ProductUnit {
+  const factory ProductUnit({
+    required String id,
+    required String organizationId,
+    required String name,
+    required String abbreviation,
+    required bool isActive,
+  }) = _ProductUnit;
+
+  factory ProductUnit.empty() => const ProductUnit(
+    id: '',
+    organizationId: '',
+    name: '',
+    abbreviation: '',
+    isActive: false,
+  );
+}

lib/domain/unit/failures/unit_failure.dart

@@ -0,0 +1,12 @@
+part of '../unit.dart';
+
+@freezed
+sealed class UnitFailure with _$UnitFailure {
+  const factory UnitFailure.serverError(ApiFailure failure) = _ServerError;
+  const factory UnitFailure.unexpectedError() = _UnexpectedError;
+  const factory UnitFailure.empty() = _Empty;
+  const factory UnitFailure.localStorageError(String erroMessage) =
+      _LocalStorageError;
+  const factory UnitFailure.dynamicErrorMessage(String erroMessage) =
+      _DynamicErrorMessage;
+}

lib/domain/unit/repositories/i_unit_repository.dart

@@ -0,0 +1,12 @@
+part of '../unit.dart';
+
+abstract class IUnitRepository {
+  /// Ambil satuan dari server lalu simpan ke cache lokal.
+  /// Bila server tidak terjangkau, kembalikan isi cache supaya POS tetap bisa
+  /// mencetak `4,2 ons` saat offline.
+  Future<Either<UnitFailure, List<ProductUnit>>> getUnits({
+    bool forceRefresh = false,
+  });
+
+  Future<List<ProductUnit>> cachedUnits();
+}

lib/domain/unit/unit.dart

@@ -0,0 +1,10 @@
+import 'package:dartz/dartz.dart';
+import 'package:freezed_annotation/freezed_annotation.dart';
+
+import '../../common/api/api_failure.dart';
+
+part 'unit.freezed.dart';
+
+part 'entities/unit_entity.dart';
+part 'failures/unit_failure.dart';
+part 'repositories/i_unit_repository.dart';

lib/env.dart

@@ -10,18 +10,18 @@ abstract class Env {
 @dev
 class DevEnv implements Env {
   @override
-  String get baseUrl => 'https://api-pos.apskel.id';
+  String get baseUrl => 'https://enaklo-pos-api.altru.id';
 
   @override
-  String get dbName => "apskel_pos_dev.db"; // example value
+  String get dbName => "apskel_pos_staging.db";
 }
 
 @Injectable(as: Env)
 @prod
 class ProdEnv implements Env {
   @override
-  String get baseUrl => 'https://api-pos.apskel.id';
+  String get baseUrl => 'https://enaklo-pos-api.altru.id';
 
   @override
-  String get dbName => "apskel_pos_dev.db";
+  String get dbName => "apskel_pos_prod.db";
 }

lib/infrastructure/order/datasources/remote_data_provider.dart

@@ -18,6 +18,15 @@ class OrderRemoteDataProvider {
   final _logName = 'OrderRemoteDataProvider';
   OrderRemoteDataProvider(this._apiClient);
 
+  /// Helper untuk merge auth header dengan idempotency key
+  Map<String, dynamic> _buildHeaders({String? idempotencyKey}) {
+    final headers = getAuthorizationHeader();
+    if (idempotencyKey != null) {
+      headers['X-Idempotency-Key'] = idempotencyKey;
+    }
+    return headers;
+  }
+
   Future<DC<OrderFailure, ListOrderDto>> fetchOrders({
     int page = 1,
     int limit = 10,
@@ -46,6 +55,12 @@ class OrderRemoteDataProvider {
       );
 
       if (response.data['success'] == false) {
+        // Pesan validasi backend menyebut nama produk, jadi diteruskan apa
+        // adanya ke kasir alih-alih diganti pesan generik.
+        final cause = extractApiErrorCause(response.data);
+        if (cause != null) {
+          return DC.error(OrderFailure.dynamicErrorMessage(cause));
+        }
         return DC.error(const OrderFailure.unexpectedError());
       }
 
@@ -68,6 +83,12 @@ class OrderRemoteDataProvider {
       );
 
       if (response.data['success'] == false) {
+        // Pesan validasi backend menyebut nama produk, jadi diteruskan apa
+        // adanya ke kasir alih-alih diganti pesan generik.
+        final cause = extractApiErrorCause(response.data);
+        if (cause != null) {
+          return DC.error(OrderFailure.dynamicErrorMessage(cause));
+        }
         return DC.error(const OrderFailure.unexpectedError());
       }
 
@@ -93,6 +114,12 @@ class OrderRemoteDataProvider {
       );
 
       if (response.data['success'] == false) {
+        // Pesan validasi backend menyebut nama produk, jadi diteruskan apa
+        // adanya ke kasir alih-alih diganti pesan generik.
+        final cause = extractApiErrorCause(response.data);
+        if (cause != null) {
+          return DC.error(OrderFailure.dynamicErrorMessage(cause));
+        }
         return DC.error(const OrderFailure.unexpectedError());
       }
 
@@ -119,6 +146,12 @@ class OrderRemoteDataProvider {
       );
 
       if (response.data['success'] == false) {
+        // Pesan validasi backend menyebut nama produk, jadi diteruskan apa
+        // adanya ke kasir alih-alih diganti pesan generik.
+        final cause = extractApiErrorCause(response.data);
+        if (cause != null) {
+          return DC.error(OrderFailure.dynamicErrorMessage(cause));
+        }
         return DC.error(const OrderFailure.unexpectedError());
       } else {
         final order = OrderDto.fromJson(
@@ -151,16 +184,23 @@ class OrderRemoteDataProvider {
   }
 
   Future<DC<OrderFailure, PaymentDto>> storePayment(
-    PaymentRequestDto request,
+    PaymentRequestDto request, {
-  ) async {
+    String? idempotencyKey,
+  }) async {
     try {
       final response = await _apiClient.post(
         ApiPath.payments,
         data: request.toJson(),
-        headers: getAuthorizationHeader(),
+        headers: _buildHeaders(idempotencyKey: idempotencyKey),
       );
 
       if (response.data['success'] == false) {
+        // Pesan validasi backend menyebut nama produk, jadi diteruskan apa
+        // adanya ke kasir alih-alih diganti pesan generik.
+        final cause = extractApiErrorCause(response.data);
+        if (cause != null) {
+          return DC.error(OrderFailure.dynamicErrorMessage(cause));
+        }
         return DC.error(const OrderFailure.unexpectedError());
       }
 
@@ -178,6 +218,7 @@ class OrderRemoteDataProvider {
   Future<DC<OrderFailure, OrderDto>> addItemOrder({
     required String id,
     required List<AddItemOrderRequestDto> request,
+    String? idempotencyKey,
   }) async {
     try {
       final response = await _apiClient.post(
@@ -186,10 +227,16 @@ class OrderRemoteDataProvider {
           'notes': '',
           'order_items': request.map((e) => e.toRequest()).toList(),
         },
-        headers: getAuthorizationHeader(),
+        headers: _buildHeaders(idempotencyKey: idempotencyKey),
       );
 
       if (response.data['success'] == false) {
+        // Pesan validasi backend menyebut nama produk, jadi diteruskan apa
+        // adanya ke kasir alih-alih diganti pesan generik.
+        final cause = extractApiErrorCause(response.data);
+        if (cause != null) {
+          return DC.error(OrderFailure.dynamicErrorMessage(cause));
+        }
         return DC.error(const OrderFailure.unexpectedError());
       }
 
@@ -209,6 +256,7 @@ class OrderRemoteDataProvider {
     required String reason,
     String type = "ITEM", // TYPE: ALL, ITEM
     required List<OrderItemDto> orderItems,
+    String? idempotencyKey,
   }) async {
     try {
       final response = await _apiClient.post(
@@ -223,10 +271,16 @@ class OrderRemoteDataProvider {
               )
               .toList(),
         },
-        headers: getAuthorizationHeader(),
+        headers: _buildHeaders(idempotencyKey: idempotencyKey),
       );
 
       if (response.data['success'] == false) {
+        // Pesan validasi backend menyebut nama produk, jadi diteruskan apa
+        // adanya ke kasir alih-alih diganti pesan generik.
+        final cause = extractApiErrorCause(response.data);
+        if (cause != null) {
+          return DC.error(OrderFailure.dynamicErrorMessage(cause));
+        }
         return DC.error(const OrderFailure.unexpectedError());
       }
 
@@ -238,17 +292,24 @@ class OrderRemoteDataProvider {
   }
 
   Future<DC<OrderFailure, PaymentDto>> createSplitBill(
-    PaymentSplitBillRequestDto request,
+    PaymentSplitBillRequestDto request, {
-  ) async {
+    String? idempotencyKey,
+  }) async {
     log(request.toRequest().toString());
     try {
       final response = await _apiClient.post(
         "${ApiPath.orders}/split-bill",
         data: request.toRequest(),
-        headers: getAuthorizationHeader(),
+        headers: _buildHeaders(idempotencyKey: idempotencyKey),
       );
 
       if (response.data['success'] == false) {
+        // Pesan validasi backend menyebut nama produk, jadi diteruskan apa
+        // adanya ke kasir alih-alih diganti pesan generik.
+        final cause = extractApiErrorCause(response.data);
+        if (cause != null) {
+          return DC.error(OrderFailure.dynamicErrorMessage(cause));
+        }
         return DC.error(const OrderFailure.unexpectedError());
       }
 
@@ -267,15 +328,22 @@ class OrderRemoteDataProvider {
     required String id,
     required String reason,
     required int refundAmount,
+    String? idempotencyKey,
   }) async {
     try {
       final response = await _apiClient.post(
         '${ApiPath.orders}/$id/refund',
         data: {'refund_amount': refundAmount, 'reason': reason},
-        headers: getAuthorizationHeader(),
+        headers: _buildHeaders(idempotencyKey: idempotencyKey),
       );
 
       if (response.data['success'] == false) {
+        // Pesan validasi backend menyebut nama produk, jadi diteruskan apa
+        // adanya ke kasir alih-alih diganti pesan generik.
+        final cause = extractApiErrorCause(response.data);
+        if (cause != null) {
+          return DC.error(OrderFailure.dynamicErrorMessage(cause));
+        }
         return DC.error(const OrderFailure.unexpectedError());
       }
 

lib/infrastructure/order/dtos/add_item_order_request_dto.dart

@@ -10,6 +10,7 @@ class AddItemOrderRequestDto with _$AddItemOrderRequestDto {
     @JsonKey(name: 'quantity') int? quantity,
     @JsonKey(name: 'unit_price') int? unitPrice,
     @JsonKey(name: 'notes') String? notes,
+    @JsonKey(name: 'weight') double? weight,
   }) = _AddItemOrderRequestDto;
 
   factory AddItemOrderRequestDto.fromJson(Map<String, dynamic> json) =>
@@ -21,6 +22,7 @@ class AddItemOrderRequestDto with _$AddItemOrderRequestDto {
     quantity: quantity ?? 0,
     unitPrice: unitPrice ?? 0,
     notes: notes ?? '',
+    weight: weight,
   );
 
   factory AddItemOrderRequestDto.fromDomain(
@@ -31,6 +33,7 @@ class AddItemOrderRequestDto with _$AddItemOrderRequestDto {
     quantity: addItemOrderRequest.quantity,
     unitPrice: addItemOrderRequest.unitPrice,
     notes: addItemOrderRequest.notes,
+    weight: addItemOrderRequest.weight,
   );
 
   Map<String, dynamic> toRequest() {
@@ -45,6 +48,11 @@ class AddItemOrderRequestDto with _$AddItemOrderRequestDto {
       data['product_variant_id'] = productvariantId;
     }
 
+    // Produk satuan ditolak backend bila membawa berat.
+    if (weight != null) {
+      data['weight'] = weight;
+    }
+
     return data;
   }
 }

lib/infrastructure/order/dtos/order_dto.dart

@@ -114,9 +114,14 @@ class OrderItemDto with _$OrderItemDto {
     @JsonKey(name: "created_at") String? createdAt,
     @JsonKey(name: "updated_at") String? updatedAt,
     @JsonKey(name: "printer_type") String? printerType,
+    @JsonKey(name: "print_to_checker") bool? printToChecker,
     @JsonKey(name: "paid_quantity") int? paidQuantity,
     @JsonKey(name: "category_id") String? categoryId,
     @JsonKey(name: "category_name") String? categoryName,
+    @JsonKey(name: "weight") double? weight,
+    @JsonKey(name: "unit_id") String? unitId,
+    @JsonKey(name: "unit_name") String? unitName,
+    @JsonKey(name: "unit_abbreviation") String? unitAbbreviation,
   }) = _OrderItemDto;
 
   factory OrderItemDto.fromJson(Map<String, dynamic> json) =>
@@ -139,9 +144,14 @@ class OrderItemDto with _$OrderItemDto {
     createdAt: createdAt != null ? DateTime.parse(createdAt!) : DateTime(1970),
     updatedAt: updatedAt != null ? DateTime.parse(updatedAt!) : DateTime(1970),
     printerType: printerType ?? '',
+    printToChecker: printToChecker ?? false,
     paidQuantity: paidQuantity ?? 0,
     categoryId: categoryId ?? '',
     categoryName: categoryName ?? '',
+    weight: weight,
+    unitId: unitId ?? '',
+    unitName: unitName ?? '',
+    unitAbbreviation: unitAbbreviation ?? '',
   );
 
   factory OrderItemDto.fromDomain(OrderItem orderItem) => OrderItemDto(
@@ -160,8 +170,13 @@ class OrderItemDto with _$OrderItemDto {
     createdAt: orderItem.createdAt.toIso8601String(),
     updatedAt: orderItem.updatedAt.toIso8601String(),
     printerType: orderItem.printerType,
+    printToChecker: orderItem.printToChecker,
     paidQuantity: orderItem.paidQuantity,
     categoryId: orderItem.categoryId,
     categoryName: orderItem.categoryName,
+    weight: orderItem.weight,
+    unitId: orderItem.unitId,
+    unitName: orderItem.unitName,
+    unitAbbreviation: orderItem.unitAbbreviation,
   );
 }

lib/infrastructure/order/dtos/order_request_dto.dart

@@ -75,6 +75,7 @@ class OrderItemRequestDto with _$OrderItemRequestDto {
     @JsonKey(name: "quantity") int? quantity,
     @JsonKey(name: "unit_price") int? unitPrice,
     @JsonKey(name: "notes") String? notes,
+    @JsonKey(name: "weight") double? weight,
   }) = _OrderItemRequestDto;
 
   factory OrderItemRequestDto.fromJson(Map<String, dynamic> json) =>
@@ -87,6 +88,7 @@ class OrderItemRequestDto with _$OrderItemRequestDto {
     quantity: quantity ?? 0,
     unitPrice: unitPrice ?? 0,
     notes: notes ?? '',
+    weight: weight,
   );
 
   factory OrderItemRequestDto.fromDomain(OrderItemRequest request) =>
@@ -96,6 +98,7 @@ class OrderItemRequestDto with _$OrderItemRequestDto {
         quantity: request.quantity,
         unitPrice: request.unitPrice,
         notes: request.notes,
+        weight: request.weight,
       );
 
   Map<String, dynamic> toRequest() {
@@ -110,6 +113,12 @@ class OrderItemRequestDto with _$OrderItemRequestDto {
       data["product_variant_id"] = productVariantId;
     }
 
+    // Produk satuan ditolak backend bila membawa berat, jadi field ini hanya
+    // ikut saat memang ada hasil timbangan.
+    if (weight != null) {
+      data["weight"] = weight;
+    }
+
     return data;
   }
 }

lib/infrastructure/order/order_dtos.freezed.dart

@@ -1169,12 +1169,22 @@ mixin _$OrderItemDto {
   String? get updatedAt => throw _privateConstructorUsedError;
   @JsonKey(name: "printer_type")
   String? get printerType => throw _privateConstructorUsedError;
+  @JsonKey(name: "print_to_checker")
+  bool? get printToChecker => throw _privateConstructorUsedError;
   @JsonKey(name: "paid_quantity")
   int? get paidQuantity => throw _privateConstructorUsedError;
   @JsonKey(name: "category_id")
   String? get categoryId => throw _privateConstructorUsedError;
   @JsonKey(name: "category_name")
   String? get categoryName => throw _privateConstructorUsedError;
+  @JsonKey(name: "weight")
+  double? get weight => throw _privateConstructorUsedError;
+  @JsonKey(name: "unit_id")
+  String? get unitId => throw _privateConstructorUsedError;
+  @JsonKey(name: "unit_name")
+  String? get unitName => throw _privateConstructorUsedError;
+  @JsonKey(name: "unit_abbreviation")
+  String? get unitAbbreviation => throw _privateConstructorUsedError;
 
   /// Serializes this OrderItemDto to a JSON map.
   Map<String, dynamic> toJson() => throw _privateConstructorUsedError;
@@ -1209,9 +1219,14 @@ abstract class $OrderItemDtoCopyWith<$Res> {
     @JsonKey(name: "created_at") String? createdAt,
     @JsonKey(name: "updated_at") String? updatedAt,
     @JsonKey(name: "printer_type") String? printerType,
+    @JsonKey(name: "print_to_checker") bool? printToChecker,
     @JsonKey(name: "paid_quantity") int? paidQuantity,
     @JsonKey(name: "category_id") String? categoryId,
     @JsonKey(name: "category_name") String? categoryName,
+    @JsonKey(name: "weight") double? weight,
+    @JsonKey(name: "unit_id") String? unitId,
+    @JsonKey(name: "unit_name") String? unitName,
+    @JsonKey(name: "unit_abbreviation") String? unitAbbreviation,
   });
 }
 
@@ -1245,9 +1260,14 @@ class _$OrderItemDtoCopyWithImpl<$Res, $Val extends OrderItemDto>
     Object? createdAt = freezed,
     Object? updatedAt = freezed,
     Object? printerType = freezed,
+    Object? printToChecker = freezed,
     Object? paidQuantity = freezed,
     Object? categoryId = freezed,
     Object? categoryName = freezed,
+    Object? weight = freezed,
+    Object? unitId = freezed,
+    Object? unitName = freezed,
+    Object? unitAbbreviation = freezed,
   }) {
     return _then(
       _value.copyWith(
@@ -1311,6 +1331,10 @@ class _$OrderItemDtoCopyWithImpl<$Res, $Val extends OrderItemDto>
                 ? _value.printerType
                 : printerType // ignore: cast_nullable_to_non_nullable
                       as String?,
+            printToChecker: freezed == printToChecker
+                ? _value.printToChecker
+                : printToChecker // ignore: cast_nullable_to_non_nullable
+                      as bool?,
             paidQuantity: freezed == paidQuantity
                 ? _value.paidQuantity
                 : paidQuantity // ignore: cast_nullable_to_non_nullable
@@ -1323,6 +1347,22 @@ class _$OrderItemDtoCopyWithImpl<$Res, $Val extends OrderItemDto>
                 ? _value.categoryName
                 : categoryName // ignore: cast_nullable_to_non_nullable
                       as String?,
+            weight: freezed == weight
+                ? _value.weight
+                : weight // ignore: cast_nullable_to_non_nullable
+                      as double?,
+            unitId: freezed == unitId
+                ? _value.unitId
+                : unitId // ignore: cast_nullable_to_non_nullable
+                      as String?,
+            unitName: freezed == unitName
+                ? _value.unitName
+                : unitName // ignore: cast_nullable_to_non_nullable
+                      as String?,
+            unitAbbreviation: freezed == unitAbbreviation
+                ? _value.unitAbbreviation
+                : unitAbbreviation // ignore: cast_nullable_to_non_nullable
+                      as String?,
           )
           as $Val,
     );
@@ -1354,9 +1394,14 @@ abstract class _$$OrderItemDtoImplCopyWith<$Res>
     @JsonKey(name: "created_at") String? createdAt,
     @JsonKey(name: "updated_at") String? updatedAt,
     @JsonKey(name: "printer_type") String? printerType,
+    @JsonKey(name: "print_to_checker") bool? printToChecker,
     @JsonKey(name: "paid_quantity") int? paidQuantity,
     @JsonKey(name: "category_id") String? categoryId,
     @JsonKey(name: "category_name") String? categoryName,
+    @JsonKey(name: "weight") double? weight,
+    @JsonKey(name: "unit_id") String? unitId,
+    @JsonKey(name: "unit_name") String? unitName,
+    @JsonKey(name: "unit_abbreviation") String? unitAbbreviation,
   });
 }
 
@@ -1389,9 +1434,14 @@ class __$$OrderItemDtoImplCopyWithImpl<$Res>
     Object? createdAt = freezed,
     Object? updatedAt = freezed,
     Object? printerType = freezed,
+    Object? printToChecker = freezed,
     Object? paidQuantity = freezed,
     Object? categoryId = freezed,
     Object? categoryName = freezed,
+    Object? weight = freezed,
+    Object? unitId = freezed,
+    Object? unitName = freezed,
+    Object? unitAbbreviation = freezed,
   }) {
     return _then(
       _$OrderItemDtoImpl(
@@ -1455,6 +1505,10 @@ class __$$OrderItemDtoImplCopyWithImpl<$Res>
             ? _value.printerType
             : printerType // ignore: cast_nullable_to_non_nullable
                   as String?,
+        printToChecker: freezed == printToChecker
+            ? _value.printToChecker
+            : printToChecker // ignore: cast_nullable_to_non_nullable
+                  as bool?,
         paidQuantity: freezed == paidQuantity
             ? _value.paidQuantity
             : paidQuantity // ignore: cast_nullable_to_non_nullable
@@ -1467,6 +1521,22 @@ class __$$OrderItemDtoImplCopyWithImpl<$Res>
             ? _value.categoryName
             : categoryName // ignore: cast_nullable_to_non_nullable
                   as String?,
+        weight: freezed == weight
+            ? _value.weight
+            : weight // ignore: cast_nullable_to_non_nullable
+                  as double?,
+        unitId: freezed == unitId
+            ? _value.unitId
+            : unitId // ignore: cast_nullable_to_non_nullable
+                  as String?,
+        unitName: freezed == unitName
+            ? _value.unitName
+            : unitName // ignore: cast_nullable_to_non_nullable
+                  as String?,
+        unitAbbreviation: freezed == unitAbbreviation
+            ? _value.unitAbbreviation
+            : unitAbbreviation // ignore: cast_nullable_to_non_nullable
+                  as String?,
       ),
     );
   }
@@ -1491,9 +1561,14 @@ class _$OrderItemDtoImpl extends _OrderItemDto {
     @JsonKey(name: "created_at") this.createdAt,
     @JsonKey(name: "updated_at") this.updatedAt,
     @JsonKey(name: "printer_type") this.printerType,
+    @JsonKey(name: "print_to_checker") this.printToChecker,
     @JsonKey(name: "paid_quantity") this.paidQuantity,
     @JsonKey(name: "category_id") this.categoryId,
     @JsonKey(name: "category_name") this.categoryName,
+    @JsonKey(name: "weight") this.weight,
+    @JsonKey(name: "unit_id") this.unitId,
+    @JsonKey(name: "unit_name") this.unitName,
+    @JsonKey(name: "unit_abbreviation") this.unitAbbreviation,
   }) : _modifiers = modifiers,
        super._();
 
@@ -1554,6 +1629,9 @@ class _$OrderItemDtoImpl extends _OrderItemDto {
   @JsonKey(name: "printer_type")
   final String? printerType;
   @override
+  @JsonKey(name: "print_to_checker")
+  final bool? printToChecker;
+  @override
   @JsonKey(name: "paid_quantity")
   final int? paidQuantity;
   @override
@@ -1562,10 +1640,22 @@ class _$OrderItemDtoImpl extends _OrderItemDto {
   @override
   @JsonKey(name: "category_name")
   final String? categoryName;
+  @override
+  @JsonKey(name: "weight")
+  final double? weight;
+  @override
+  @JsonKey(name: "unit_id")
+  final String? unitId;
+  @override
+  @JsonKey(name: "unit_name")
+  final String? unitName;
+  @override
+  @JsonKey(name: "unit_abbreviation")
+  final String? unitAbbreviation;
 
   @override
   String toString() {
-    return 'OrderItemDto(id: $id, orderId: $orderId, productId: $productId, productName: $productName, productVariantId: $productVariantId, productVariantName: $productVariantName, quantity: $quantity, unitPrice: $unitPrice, totalPrice: $totalPrice, modifiers: $modifiers, notes: $notes, status: $status, createdAt: $createdAt, updatedAt: $updatedAt, printerType: $printerType, paidQuantity: $paidQuantity, categoryId: $categoryId, categoryName: $categoryName)';
+    return 'OrderItemDto(id: $id, orderId: $orderId, productId: $productId, productName: $productName, productVariantId: $productVariantId, productVariantName: $productVariantName, quantity: $quantity, unitPrice: $unitPrice, totalPrice: $totalPrice, modifiers: $modifiers, notes: $notes, status: $status, createdAt: $createdAt, updatedAt: $updatedAt, printerType: $printerType, printToChecker: $printToChecker, paidQuantity: $paidQuantity, categoryId: $categoryId, categoryName: $categoryName, weight: $weight, unitId: $unitId, unitName: $unitName, unitAbbreviation: $unitAbbreviation)';
   }
 
   @override
@@ -1601,17 +1691,25 @@ class _$OrderItemDtoImpl extends _OrderItemDto {
                 other.updatedAt == updatedAt) &&
             (identical(other.printerType, printerType) ||
                 other.printerType == printerType) &&
+            (identical(other.printToChecker, printToChecker) ||
+                other.printToChecker == printToChecker) &&
             (identical(other.paidQuantity, paidQuantity) ||
                 other.paidQuantity == paidQuantity) &&
             (identical(other.categoryId, categoryId) ||
                 other.categoryId == categoryId) &&
             (identical(other.categoryName, categoryName) ||
-                other.categoryName == categoryName));
+                other.categoryName == categoryName) &&
+            (identical(other.weight, weight) || other.weight == weight) &&
+            (identical(other.unitId, unitId) || other.unitId == unitId) &&
+            (identical(other.unitName, unitName) ||
+                other.unitName == unitName) &&
+            (identical(other.unitAbbreviation, unitAbbreviation) ||
+                other.unitAbbreviation == unitAbbreviation));
   }
 
   @JsonKey(includeFromJson: false, includeToJson: false)
   @override
-  int get hashCode => Object.hash(
+  int get hashCode => Object.hashAll([
     runtimeType,
     id,
     orderId,
@@ -1628,10 +1726,15 @@ class _$OrderItemDtoImpl extends _OrderItemDto {
     createdAt,
     updatedAt,
     printerType,
+    printToChecker,
     paidQuantity,
     categoryId,
     categoryName,
-  );
+    weight,
+    unitId,
+    unitName,
+    unitAbbreviation,
+  ]);
 
   /// Create a copy of OrderItemDto
   /// with the given fields replaced by the non-null parameter values.
@@ -1664,9 +1767,14 @@ abstract class _OrderItemDto extends OrderItemDto {
     @JsonKey(name: "created_at") final String? createdAt,
     @JsonKey(name: "updated_at") final String? updatedAt,
     @JsonKey(name: "printer_type") final String? printerType,
+    @JsonKey(name: "print_to_checker") final bool? printToChecker,
     @JsonKey(name: "paid_quantity") final int? paidQuantity,
     @JsonKey(name: "category_id") final String? categoryId,
     @JsonKey(name: "category_name") final String? categoryName,
+    @JsonKey(name: "weight") final double? weight,
+    @JsonKey(name: "unit_id") final String? unitId,
+    @JsonKey(name: "unit_name") final String? unitName,
+    @JsonKey(name: "unit_abbreviation") final String? unitAbbreviation,
   }) = _$OrderItemDtoImpl;
   const _OrderItemDto._() : super._();
 
@@ -1719,6 +1827,9 @@ abstract class _OrderItemDto extends OrderItemDto {
   @JsonKey(name: "printer_type")
   String? get printerType;
   @override
+  @JsonKey(name: "print_to_checker")
+  bool? get printToChecker;
+  @override
   @JsonKey(name: "paid_quantity")
   int? get paidQuantity;
   @override
@@ -1727,6 +1838,18 @@ abstract class _OrderItemDto extends OrderItemDto {
   @override
   @JsonKey(name: "category_name")
   String? get categoryName;
+  @override
+  @JsonKey(name: "weight")
+  double? get weight;
+  @override
+  @JsonKey(name: "unit_id")
+  String? get unitId;
+  @override
+  @JsonKey(name: "unit_name")
+  String? get unitName;
+  @override
+  @JsonKey(name: "unit_abbreviation")
+  String? get unitAbbreviation;
 
   /// Create a copy of OrderItemDto
   /// with the given fields replaced by the non-null parameter values.
@@ -2111,6 +2234,8 @@ mixin _$OrderItemRequestDto {
   int? get unitPrice => throw _privateConstructorUsedError;
   @JsonKey(name: "notes")
   String? get notes => throw _privateConstructorUsedError;
+  @JsonKey(name: "weight")
+  double? get weight => throw _privateConstructorUsedError;
 
   /// Serializes this OrderItemRequestDto to a JSON map.
   Map<String, dynamic> toJson() => throw _privateConstructorUsedError;
@@ -2135,6 +2260,7 @@ abstract class $OrderItemRequestDtoCopyWith<$Res> {
     @JsonKey(name: "quantity") int? quantity,
     @JsonKey(name: "unit_price") int? unitPrice,
     @JsonKey(name: "notes") String? notes,
+    @JsonKey(name: "weight") double? weight,
   });
 }
 
@@ -2158,6 +2284,7 @@ class _$OrderItemRequestDtoCopyWithImpl<$Res, $Val extends OrderItemRequestDto>
     Object? quantity = freezed,
     Object? unitPrice = freezed,
     Object? notes = freezed,
+    Object? weight = freezed,
   }) {
     return _then(
       _value.copyWith(
@@ -2181,6 +2308,10 @@ class _$OrderItemRequestDtoCopyWithImpl<$Res, $Val extends OrderItemRequestDto>
                 ? _value.notes
                 : notes // ignore: cast_nullable_to_non_nullable
                       as String?,
+            weight: freezed == weight
+                ? _value.weight
+                : weight // ignore: cast_nullable_to_non_nullable
+                      as double?,
           )
           as $Val,
     );
@@ -2202,6 +2333,7 @@ abstract class _$$OrderItemRequestDtoImplCopyWith<$Res>
     @JsonKey(name: "quantity") int? quantity,
     @JsonKey(name: "unit_price") int? unitPrice,
     @JsonKey(name: "notes") String? notes,
+    @JsonKey(name: "weight") double? weight,
   });
 }
 
@@ -2224,6 +2356,7 @@ class __$$OrderItemRequestDtoImplCopyWithImpl<$Res>
     Object? quantity = freezed,
     Object? unitPrice = freezed,
     Object? notes = freezed,
+    Object? weight = freezed,
   }) {
     return _then(
       _$OrderItemRequestDtoImpl(
@@ -2247,6 +2380,10 @@ class __$$OrderItemRequestDtoImplCopyWithImpl<$Res>
             ? _value.notes
             : notes // ignore: cast_nullable_to_non_nullable
                   as String?,
+        weight: freezed == weight
+            ? _value.weight
+            : weight // ignore: cast_nullable_to_non_nullable
+                  as double?,
       ),
     );
   }
@@ -2261,6 +2398,7 @@ class _$OrderItemRequestDtoImpl extends _OrderItemRequestDto {
     @JsonKey(name: "quantity") this.quantity,
     @JsonKey(name: "unit_price") this.unitPrice,
     @JsonKey(name: "notes") this.notes,
+    @JsonKey(name: "weight") this.weight,
   }) : super._();
 
   factory _$OrderItemRequestDtoImpl.fromJson(Map<String, dynamic> json) =>
@@ -2281,10 +2419,13 @@ class _$OrderItemRequestDtoImpl extends _OrderItemRequestDto {
   @override
   @JsonKey(name: "notes")
   final String? notes;
+  @override
+  @JsonKey(name: "weight")
+  final double? weight;
 
   @override
   String toString() {
-    return 'OrderItemRequestDto(productId: $productId, productVariantId: $productVariantId, quantity: $quantity, unitPrice: $unitPrice, notes: $notes)';
+    return 'OrderItemRequestDto(productId: $productId, productVariantId: $productVariantId, quantity: $quantity, unitPrice: $unitPrice, notes: $notes, weight: $weight)';
   }
 
   @override
@@ -2300,7 +2441,8 @@ class _$OrderItemRequestDtoImpl extends _OrderItemRequestDto {
                 other.quantity == quantity) &&
             (identical(other.unitPrice, unitPrice) ||
                 other.unitPrice == unitPrice) &&
-            (identical(other.notes, notes) || other.notes == notes));
+            (identical(other.notes, notes) || other.notes == notes) &&
+            (identical(other.weight, weight) || other.weight == weight));
   }
 
   @JsonKey(includeFromJson: false, includeToJson: false)
@@ -2312,6 +2454,7 @@ class _$OrderItemRequestDtoImpl extends _OrderItemRequestDto {
     quantity,
     unitPrice,
     notes,
+    weight,
   );
 
   /// Create a copy of OrderItemRequestDto
@@ -2338,6 +2481,7 @@ abstract class _OrderItemRequestDto extends OrderItemRequestDto {
     @JsonKey(name: "quantity") final int? quantity,
     @JsonKey(name: "unit_price") final int? unitPrice,
     @JsonKey(name: "notes") final String? notes,
+    @JsonKey(name: "weight") final double? weight,
   }) = _$OrderItemRequestDtoImpl;
   const _OrderItemRequestDto._() : super._();
 
@@ -2359,6 +2503,9 @@ abstract class _OrderItemRequestDto extends OrderItemRequestDto {
   @override
   @JsonKey(name: "notes")
   String? get notes;
+  @override
+  @JsonKey(name: "weight")
+  double? get weight;
 
   /// Create a copy of OrderItemRequestDto
   /// with the given fields replaced by the non-null parameter values.
@@ -4000,6 +4147,8 @@ mixin _$AddItemOrderRequestDto {
   int? get unitPrice => throw _privateConstructorUsedError;
   @JsonKey(name: 'notes')
   String? get notes => throw _privateConstructorUsedError;
+  @JsonKey(name: 'weight')
+  double? get weight => throw _privateConstructorUsedError;
 
   /// Serializes this AddItemOrderRequestDto to a JSON map.
   Map<String, dynamic> toJson() => throw _privateConstructorUsedError;
@@ -4024,6 +4173,7 @@ abstract class $AddItemOrderRequestDtoCopyWith<$Res> {
     @JsonKey(name: 'quantity') int? quantity,
     @JsonKey(name: 'unit_price') int? unitPrice,
     @JsonKey(name: 'notes') String? notes,
+    @JsonKey(name: 'weight') double? weight,
   });
 }
 
@@ -4050,6 +4200,7 @@ class _$AddItemOrderRequestDtoCopyWithImpl<
     Object? quantity = freezed,
     Object? unitPrice = freezed,
     Object? notes = freezed,
+    Object? weight = freezed,
   }) {
     return _then(
       _value.copyWith(
@@ -4073,6 +4224,10 @@ class _$AddItemOrderRequestDtoCopyWithImpl<
                 ? _value.notes
                 : notes // ignore: cast_nullable_to_non_nullable
                       as String?,
+            weight: freezed == weight
+                ? _value.weight
+                : weight // ignore: cast_nullable_to_non_nullable
+                      as double?,
           )
           as $Val,
     );
@@ -4094,6 +4249,7 @@ abstract class _$$AddItemOrderRequestDtoImplCopyWith<$Res>
     @JsonKey(name: 'quantity') int? quantity,
     @JsonKey(name: 'unit_price') int? unitPrice,
     @JsonKey(name: 'notes') String? notes,
+    @JsonKey(name: 'weight') double? weight,
   });
 }
 
@@ -4117,6 +4273,7 @@ class __$$AddItemOrderRequestDtoImplCopyWithImpl<$Res>
     Object? quantity = freezed,
     Object? unitPrice = freezed,
     Object? notes = freezed,
+    Object? weight = freezed,
   }) {
     return _then(
       _$AddItemOrderRequestDtoImpl(
@@ -4140,6 +4297,10 @@ class __$$AddItemOrderRequestDtoImplCopyWithImpl<$Res>
             ? _value.notes
             : notes // ignore: cast_nullable_to_non_nullable
                   as String?,
+        weight: freezed == weight
+            ? _value.weight
+            : weight // ignore: cast_nullable_to_non_nullable
+                  as double?,
       ),
     );
   }
@@ -4154,6 +4315,7 @@ class _$AddItemOrderRequestDtoImpl extends _AddItemOrderRequestDto {
     @JsonKey(name: 'quantity') this.quantity,
     @JsonKey(name: 'unit_price') this.unitPrice,
     @JsonKey(name: 'notes') this.notes,
+    @JsonKey(name: 'weight') this.weight,
   }) : super._();
 
   factory _$AddItemOrderRequestDtoImpl.fromJson(Map<String, dynamic> json) =>
@@ -4174,10 +4336,13 @@ class _$AddItemOrderRequestDtoImpl extends _AddItemOrderRequestDto {
   @override
   @JsonKey(name: 'notes')
   final String? notes;
+  @override
+  @JsonKey(name: 'weight')
+  final double? weight;
 
   @override
   String toString() {
-    return 'AddItemOrderRequestDto(productId: $productId, productvariantId: $productvariantId, quantity: $quantity, unitPrice: $unitPrice, notes: $notes)';
+    return 'AddItemOrderRequestDto(productId: $productId, productvariantId: $productvariantId, quantity: $quantity, unitPrice: $unitPrice, notes: $notes, weight: $weight)';
   }
 
   @override
@@ -4193,7 +4358,8 @@ class _$AddItemOrderRequestDtoImpl extends _AddItemOrderRequestDto {
                 other.quantity == quantity) &&
             (identical(other.unitPrice, unitPrice) ||
                 other.unitPrice == unitPrice) &&
-            (identical(other.notes, notes) || other.notes == notes));
+            (identical(other.notes, notes) || other.notes == notes) &&
+            (identical(other.weight, weight) || other.weight == weight));
   }
 
   @JsonKey(includeFromJson: false, includeToJson: false)
@@ -4205,6 +4371,7 @@ class _$AddItemOrderRequestDtoImpl extends _AddItemOrderRequestDto {
     quantity,
     unitPrice,
     notes,
+    weight,
   );
 
   /// Create a copy of AddItemOrderRequestDto
@@ -4232,6 +4399,7 @@ abstract class _AddItemOrderRequestDto extends AddItemOrderRequestDto {
     @JsonKey(name: 'quantity') final int? quantity,
     @JsonKey(name: 'unit_price') final int? unitPrice,
     @JsonKey(name: 'notes') final String? notes,
+    @JsonKey(name: 'weight') final double? weight,
   }) = _$AddItemOrderRequestDtoImpl;
   const _AddItemOrderRequestDto._() : super._();
 
@@ -4253,6 +4421,9 @@ abstract class _AddItemOrderRequestDto extends AddItemOrderRequestDto {
   @override
   @JsonKey(name: 'notes')
   String? get notes;
+  @override
+  @JsonKey(name: 'weight')
+  double? get weight;
 
   /// Create a copy of AddItemOrderRequestDto
   /// with the given fields replaced by the non-null parameter values.

lib/infrastructure/order/order_dtos.g.dart

@@ -109,9 +109,14 @@ _$OrderItemDtoImpl _$$OrderItemDtoImplFromJson(Map<String, dynamic> json) =>
       createdAt: json['created_at'] as String?,
       updatedAt: json['updated_at'] as String?,
       printerType: json['printer_type'] as String?,
+      printToChecker: json['print_to_checker'] as bool?,
       paidQuantity: (json['paid_quantity'] as num?)?.toInt(),
       categoryId: json['category_id'] as String?,
       categoryName: json['category_name'] as String?,
+      weight: (json['weight'] as num?)?.toDouble(),
+      unitId: json['unit_id'] as String?,
+      unitName: json['unit_name'] as String?,
+      unitAbbreviation: json['unit_abbreviation'] as String?,
     );
 
 Map<String, dynamic> _$$OrderItemDtoImplToJson(_$OrderItemDtoImpl instance) =>
@@ -131,9 +136,14 @@ Map<String, dynamic> _$$OrderItemDtoImplToJson(_$OrderItemDtoImpl instance) =>
       'created_at': instance.createdAt,
       'updated_at': instance.updatedAt,
       'printer_type': instance.printerType,
+      'print_to_checker': instance.printToChecker,
       'paid_quantity': instance.paidQuantity,
       'category_id': instance.categoryId,
       'category_name': instance.categoryName,
+      'weight': instance.weight,
+      'unit_id': instance.unitId,
+      'unit_name': instance.unitName,
+      'unit_abbreviation': instance.unitAbbreviation,
     };
 
 _$OrderRequestDtoImpl _$$OrderRequestDtoImplFromJson(
@@ -172,6 +182,7 @@ _$OrderItemRequestDtoImpl _$$OrderItemRequestDtoImplFromJson(
   quantity: (json['quantity'] as num?)?.toInt(),
   unitPrice: (json['unit_price'] as num?)?.toInt(),
   notes: json['notes'] as String?,
+  weight: (json['weight'] as num?)?.toDouble(),
 );
 
 Map<String, dynamic> _$$OrderItemRequestDtoImplToJson(
@@ -182,6 +193,7 @@ Map<String, dynamic> _$$OrderItemRequestDtoImplToJson(
   'quantity': instance.quantity,
   'unit_price': instance.unitPrice,
   'notes': instance.notes,
+  'weight': instance.weight,
 };
 
 _$PaymentRequestDtoImpl _$$PaymentRequestDtoImplFromJson(
@@ -315,6 +327,7 @@ _$AddItemOrderRequestDtoImpl _$$AddItemOrderRequestDtoImplFromJson(
   quantity: (json['quantity'] as num?)?.toInt(),
   unitPrice: (json['unit_price'] as num?)?.toInt(),
   notes: json['notes'] as String?,
+  weight: (json['weight'] as num?)?.toDouble(),
 );
 
 Map<String, dynamic> _$$AddItemOrderRequestDtoImplToJson(
@@ -325,4 +338,5 @@ Map<String, dynamic> _$$AddItemOrderRequestDtoImplToJson(
   'quantity': instance.quantity,
   'unit_price': instance.unitPrice,
   'notes': instance.notes,
+  'weight': instance.weight,
 };

lib/infrastructure/order/repositories/order_repository.dart

@@ -110,6 +110,7 @@ class OrderRepository implements IOrderRepository {
   Future<Either<OrderFailure, Order>> addItemOrder({
     required String id,
     required List<AddItemOrderRequest> request,
+    String? idempotencyKey,
   }) async {
     try {
       final result = await _dataProvider.addItemOrder(
@@ -117,6 +118,7 @@ class OrderRepository implements IOrderRepository {
         request: request
             .map((e) => AddItemOrderRequestDto.fromDomain(e))
             .toList(),
+        idempotencyKey: idempotencyKey,
       );
 
       if (result.hasError) {
@@ -134,10 +136,12 @@ class OrderRepository implements IOrderRepository {
   @override
   Future<Either<OrderFailure, Payment>> createPayment({
     required PaymentRequest request,
+    String? idempotencyKey,
   }) async {
     try {
       final result = await _dataProvider.storePayment(
         PaymentRequestDto.fromDomain(request),
+        idempotencyKey: idempotencyKey,
       );
 
       if (result.hasError) {
@@ -158,6 +162,7 @@ class OrderRepository implements IOrderRepository {
     required String reason,
     String type = "ITEM",
     required List<OrderItem> orderItems,
+    String? idempotencyKey,
   }) async {
     try {
       final result = await _dataProvider.voidOrder(
@@ -165,6 +170,7 @@ class OrderRepository implements IOrderRepository {
         reason: reason,
         type: type,
         orderItems: orderItems.map((e) => OrderItemDto.fromDomain(e)).toList(),
+        idempotencyKey: idempotencyKey,
       );
 
       if (result.hasError) {
@@ -180,11 +186,13 @@ class OrderRepository implements IOrderRepository {
 
   @override
   Future<Either<OrderFailure, Payment>> createSplitBill(
-    PaymentSplitBillRequest request,
+    PaymentSplitBillRequest request, {
-  ) async {
+    String? idempotencyKey,
+  }) async {
     try {
       final result = await _dataProvider.createSplitBill(
         PaymentSplitBillRequestDto.fromDomain(request),
+        idempotencyKey: idempotencyKey,
       );
 
       if (result.hasError) {
@@ -204,12 +212,14 @@ class OrderRepository implements IOrderRepository {
     required String id,
     required String reason,
     required int refundAmount,
+    String? idempotencyKey,
   }) async {
     try {
       final result = await _dataProvider.refundPayment(
         id: id,
         reason: reason,
         refundAmount: refundAmount,
+        idempotencyKey: idempotencyKey,
       );
       if (result.hasError) {
         return left(result.error!);

lib/infrastructure/printer/datasource/network_printer_client.dart

@@ -0,0 +1,271 @@
+import 'dart:async';
+import 'dart:developer';
+import 'dart:io';
+
+/// Kenapa sebuah cetakan jaringan dianggap gagal.
+enum NetworkPrintFailure {
+  /// Socket tidak bisa dibuka — IP salah, printer mati, atau beda jaringan.
+  unreachable,
+
+  /// Printer menjawab bahwa kertasnya habis.
+  paperOut,
+
+  /// Printer menjawab bahwa cover-nya terbuka.
+  coverOpen,
+
+  /// Printer menjawab sedang offline / dalam kondisi error.
+  offline,
+
+  /// Koneksi terbuka tapi pengiriman data putus di tengah jalan.
+  writeFailed,
+}
+
+class NetworkPrintResult {
+  final NetworkPrintFailure? failure;
+
+  /// Printer membalas perintah status. Printer clone yang tidak mendukung
+  /// `DLE EOT` membuat ini `false`, dan pemeriksaan kondisi kertas dilewati.
+  final bool statusSupported;
+
+  /// Kertas menipis. Bukan kegagalan — cetakan tetap keluar, tapi layak
+  /// diberitahukan ke kasir.
+  final bool paperNearEnd;
+
+  const NetworkPrintResult({
+    this.failure,
+    this.statusSupported = false,
+    this.paperNearEnd = false,
+  });
+
+  bool get isSuccess => failure == null;
+}
+
+/// Mencetak ke printer thermal jaringan lewat raw socket port 9100.
+///
+/// Berbeda dari `flutter_esc_pos_network` yang hanya mengirim byte lalu menutup
+/// koneksi, klien ini menanyakan kondisi printer dengan `DLE EOT` dan membaca
+/// jawabannya. Tanpa itu, kertas habis atau cover terbuka tidak bisa dibedakan
+/// dari cetakan yang berhasil — byte tetap diterima socket dan semuanya tampak
+/// sukses.
+class NetworkPrinterClient {
+  static const _logName = 'NetworkPrinterClient';
+
+  /// Perintah status real-time ESC/POS: `DLE EOT n`.
+  static const _statusPrinter = [0x10, 0x04, 1];
+  static const _statusOffline = [0x10, 0x04, 2];
+  static const _statusPaper = [0x10, 0x04, 4];
+
+  /// Jeda menunggu balasan status. Sengaja pendek: printer yang tidak
+  /// mendukung `DLE EOT` tidak akan pernah menjawab, dan kita tidak boleh
+  /// menahan kasir hanya untuk menunggu jawaban yang tidak akan datang.
+  static const _statusTimeout = Duration(milliseconds: 800);
+
+  /// Host yang terbukti tidak menjawab `DLE EOT`. Tanpa catatan ini, printer
+  /// clone membuat setiap cetakan membayar timeout di atas — mahal untuk kasir
+  /// yang sedang antre. Cukup dibuktikan sekali per sesi aplikasi.
+  final Set<String> _statusUnsupported = {};
+
+  Future<NetworkPrintResult> printTicket({
+    required String host,
+    required List<int> data,
+    int port = 9100,
+    Duration connectTimeout = const Duration(seconds: 10),
+  }) async {
+    Socket? socket;
+
+    try {
+      socket = await Socket.connect(host, port, timeout: connectTimeout);
+    } catch (e) {
+      log('Tidak bisa membuka socket ke $host:$port', name: _logName, error: e);
+      return const NetworkPrintResult(
+        failure: NetworkPrintFailure.unreachable,
+      );
+    }
+
+    final reader = _SocketReader();
+    late StreamSubscription<List<int>> subscription;
+
+    try {
+      subscription = socket.listen(
+        reader.add,
+        onError: (Object e) => log('Socket error', name: _logName, error: e),
+        cancelOnError: false,
+      );
+
+      final before = await _readStatus(socket, reader, host);
+
+      if (before.answered) {
+        final blocking = before.blockingFailure;
+        if (blocking != null) {
+          log('Printer $host menolak: ${blocking.name}', name: _logName);
+          return NetworkPrintResult(failure: blocking, statusSupported: true);
+        }
+      }
+
+      socket.add(data);
+      await socket.flush();
+
+      // Kertas bisa habis di tengah struk. Cetakan yang terpotong sama
+      // tidak bergunanya dengan yang tidak keluar sama sekali, jadi kondisi
+      // ini dilaporkan sebagai gagal supaya kasir mencetak ulang.
+      final after = before.answered
+          ? await _readStatus(socket, reader, host)
+          : const _PrinterStatus.unanswered();
+
+      if (after.answered) {
+        final blocking = after.blockingFailure;
+        if (blocking != null) {
+          log('Printer $host bermasalah setelah cetak: ${blocking.name}',
+              name: _logName);
+          return NetworkPrintResult(failure: blocking, statusSupported: true);
+        }
+      }
+
+      return NetworkPrintResult(
+        statusSupported: before.answered,
+        paperNearEnd: after.paperNearEnd || before.paperNearEnd,
+      );
+    } catch (e) {
+      log('Gagal mengirim data ke $host:$port', name: _logName, error: e);
+      return const NetworkPrintResult(
+        failure: NetworkPrintFailure.writeFailed,
+        statusSupported: false,
+      );
+    } finally {
+      await subscription.cancel().catchError((_) {});
+      try {
+        await socket.close();
+      } catch (_) {
+        // Printer kadang menutup duluan; tidak ada yang bisa diperbuat.
+      }
+      socket.destroy();
+    }
+  }
+
+  Future<_PrinterStatus> _readStatus(
+    Socket socket,
+    _SocketReader reader,
+    String host,
+  ) async {
+    if (_statusUnsupported.contains(host)) {
+      return const _PrinterStatus.unanswered();
+    }
+
+    final printer = await _query(socket, reader, _statusPrinter);
+
+    // Printer yang tidak mendukung DLE EOT tidak menjawab sama sekali.
+    // Perlakukan sebagai "tidak diketahui", bukan sebagai error — kalau tidak,
+    // printer semacam itu jadi tidak bisa dipakai sama sekali.
+    if (printer == null) {
+      log(
+        'Printer $host tidak menjawab status; pemeriksaan kondisi kertas '
+        'dilewati untuk seterusnya',
+        name: _logName,
+      );
+      _statusUnsupported.add(host);
+      return const _PrinterStatus.unanswered();
+    }
+
+    final offline = await _query(socket, reader, _statusOffline);
+    final paper = await _query(socket, reader, _statusPaper);
+
+    return _PrinterStatus(
+      answered: true,
+      offline: printer & 0x08 != 0,
+      coverOpen: (offline ?? 0) & 0x04 != 0,
+      paperOut: ((offline ?? 0) & 0x20 != 0) || ((paper ?? 0) & 0x60 != 0),
+      paperNearEnd: (paper ?? 0) & 0x0C != 0,
+    );
+  }
+
+  /// Mengirim satu perintah status dan menunggu satu byte balasan.
+  /// `null` berarti printer tidak menjawab atau menjawab dengan format asing.
+  Future<int?> _query(
+    Socket socket,
+    _SocketReader reader,
+    List<int> command,
+  ) async {
+    reader.clear();
+    socket.add(command);
+    await socket.flush();
+
+    final byte = await reader.readByte(_statusTimeout);
+    if (byte == null) return null;
+
+    // Balasan DLE EOT selalu punya pola tetap: bit0=0, bit1=1, bit4=1, bit7=0.
+    // Byte yang tidak cocok berarti bukan balasan status, jadi lebih aman
+    // dianggap tidak menjawab daripada salah tafsir.
+    if (byte & 0x93 != 0x12) {
+      log('Balasan status tidak dikenali: 0x${byte.toRadixString(16)}',
+          name: _logName);
+      return null;
+    }
+
+    return byte;
+  }
+}
+
+class _PrinterStatus {
+  final bool answered;
+  final bool offline;
+  final bool coverOpen;
+  final bool paperOut;
+  final bool paperNearEnd;
+
+  const _PrinterStatus({
+    required this.answered,
+    this.offline = false,
+    this.coverOpen = false,
+    this.paperOut = false,
+    this.paperNearEnd = false,
+  });
+
+  const _PrinterStatus.unanswered()
+      : answered = false,
+        offline = false,
+        coverOpen = false,
+        paperOut = false,
+        paperNearEnd = false;
+
+  /// Kondisi yang membuat struk tidak akan keluar. Diperiksa berurutan dari
+  /// yang paling spesifik supaya pesan ke kasir langsung menyebut tindakannya.
+  NetworkPrintFailure? get blockingFailure {
+    if (paperOut) return NetworkPrintFailure.paperOut;
+    if (coverOpen) return NetworkPrintFailure.coverOpen;
+    if (offline) return NetworkPrintFailure.offline;
+    return null;
+  }
+}
+
+/// Menampung byte yang datang dari socket dan membiarkannya dibaca satu per
+/// satu dengan batas waktu. Socket adalah stream sekali-langganan, jadi
+/// pembacaannya harus lewat satu subscription untuk seluruh sesi.
+class _SocketReader {
+  final List<int> _buffer = [];
+  Completer<void>? _waiter;
+
+  void add(List<int> data) {
+    _buffer.addAll(data);
+    _waiter?.complete();
+    _waiter = null;
+  }
+
+  void clear() => _buffer.clear();
+
+  Future<int?> readByte(Duration timeout) async {
+    if (_buffer.isEmpty) {
+      final waiter = Completer<void>();
+      _waiter = waiter;
+
+      try {
+        await waiter.future.timeout(timeout);
+      } on TimeoutException {
+        _waiter = null;
+        return null;
+      }
+    }
+
+    if (_buffer.isEmpty) return null;
+    return _buffer.removeAt(0);
+  }
+}

lib/infrastructure/product/dtos/product_dto.dart

@@ -24,6 +24,25 @@ class ListProductDto with _$ListProductDto {
   );
 }
 
+/// Satuan yang menempel pada produk.
+///
+/// Backend hanya dijamin mengirim `unit_id`; sebagian response ikut menyertakan
+/// objek `unit` lengkap. Kalau ada, dipakai langsung supaya POS tidak perlu
+/// menunggu master satuan termuat.
+@freezed
+class ProductUnitDto with _$ProductUnitDto {
+  const ProductUnitDto._();
+
+  const factory ProductUnitDto({
+    @JsonKey(name: "id") String? id,
+    @JsonKey(name: "name") String? name,
+    @JsonKey(name: "abbreviation") String? abbreviation,
+  }) = _ProductUnitDto;
+
+  factory ProductUnitDto.fromJson(Map<String, dynamic> json) =>
+      _$ProductUnitDtoFromJson(json);
+}
+
 @freezed
 class ProductDto with _$ProductDto {
   const ProductDto._();
@@ -40,16 +59,34 @@ class ProductDto with _$ProductDto {
     @JsonKey(name: "business_type") String? businessType,
     @JsonKey(name: "image_url") String? imageUrl,
     @JsonKey(name: "printer_type") String? printerType,
+    @JsonKey(name: "print_to_checker") bool? printToChecker,
     @JsonKey(name: "metadata") Map<String, dynamic>? metadata,
     @JsonKey(name: "is_active") bool? isActive,
     @JsonKey(name: "created_at") String? createdAt,
     @JsonKey(name: "updated_at") String? updatedAt,
     @JsonKey(name: "variants") List<ProductVariantDto>? variants,
+    @JsonKey(name: "sell_by") String? sellBy,
+    @JsonKey(name: "unit_id") String? unitId,
+    @JsonKey(name: "unit_name") String? unitName,
+    @JsonKey(name: "unit_abbreviation") String? unitAbbreviation,
+    @JsonKey(name: "unit") ProductUnitDto? unit,
   }) = _ProductDto;
 
   factory ProductDto.fromJson(Map<String, dynamic> json) =>
       _$ProductDtoFromJson(json);
 
+  String get _resolvedUnitId =>
+      (unitId?.isNotEmpty == true ? unitId : unit?.id) ?? '';
+
+  String get _resolvedUnitName =>
+      (unitName?.isNotEmpty == true ? unitName : unit?.name) ?? '';
+
+  String get _resolvedUnitAbbreviation =>
+      (unitAbbreviation?.isNotEmpty == true
+          ? unitAbbreviation
+          : unit?.abbreviation) ??
+      '';
+
   /// Mapping ke domain
   Product toDomain() => Product(
     id: id ?? '',
@@ -63,11 +100,16 @@ class ProductDto with _$ProductDto {
     businessType: businessType ?? '',
     imageUrl: imageUrl ?? '',
     printerType: printerType ?? '',
+    printToChecker: printToChecker ?? false,
     metadata: metadata ?? {},
     isActive: isActive ?? false,
     createdAt: createdAt ?? '',
     updatedAt: updatedAt ?? '',
     variants: variants?.map((v) => v.toDomain()).toList() ?? [],
+    sellBy: SellBy.normalize(sellBy),
+    unitId: _resolvedUnitId,
+    unitName: _resolvedUnitName,
+    unitAbbreviation: _resolvedUnitAbbreviation,
   );
 
   Map<String, dynamic> toMap() => {
@@ -82,10 +124,15 @@ class ProductDto with _$ProductDto {
     'business_type': businessType,
     'image_url': imageUrl,
     'printer_type': printerType,
+    'print_to_checker': printToChecker == true ? 1 : 0,
     'metadata': metadata != null ? jsonEncode(metadata) : null,
     'is_active': isActive == true ? 1 : 0,
     'created_at': createdAt,
     'updated_at': updatedAt,
+    'sell_by': SellBy.normalize(sellBy),
+    'unit_id': _resolvedUnitId,
+    'unit_name': _resolvedUnitName,
+    'unit_abbreviation': _resolvedUnitAbbreviation,
   };
 
   factory ProductDto.fromMap(
@@ -103,6 +150,9 @@ class ProductDto with _$ProductDto {
     businessType: map['business_type'] as String?,
     imageUrl: map['image_url'] as String?,
     printerType: map['printer_type'] as String?,
+    printToChecker: map['print_to_checker'] != null
+        ? (map['print_to_checker'] as int) == 1
+        : null,
     metadata: map['metadata'] != null
         ? jsonDecode(map['metadata'] as String) as Map<String, dynamic>
         : null,
@@ -111,6 +161,10 @@ class ProductDto with _$ProductDto {
     createdAt: map['created_at'] as String?,
     updatedAt: map['updated_at'] as String?,
     variants: variants,
+    sellBy: map['sell_by'] as String?,
+    unitId: map['unit_id'] as String?,
+    unitName: map['unit_name'] as String?,
+    unitAbbreviation: map['unit_abbreviation'] as String?,
   );
 
   factory ProductDto.fromDomain(Product product) => ProductDto(
@@ -125,6 +179,7 @@ class ProductDto with _$ProductDto {
     businessType: product.businessType,
     imageUrl: product.imageUrl,
     printerType: product.printerType,
+    printToChecker: product.printToChecker,
     metadata: product.metadata,
     isActive: product.isActive,
     createdAt: product.createdAt,
@@ -132,6 +187,10 @@ class ProductDto with _$ProductDto {
     variants: product.variants
         .map((v) => ProductVariantDto.fromDomain(v))
         .toList(),
+    sellBy: product.sellBy,
+    unitId: product.unitId,
+    unitName: product.unitName,
+    unitAbbreviation: product.unitAbbreviation,
   );
 }
 

lib/infrastructure/product/product_dtos.dart

@@ -2,6 +2,7 @@ import 'dart:convert';
 
 import 'package:freezed_annotation/freezed_annotation.dart';
 
+import '../../common/types/sell_by.dart';
 import '../../domain/product/product.dart';
 
 part 'product_dtos.freezed.dart';

lib/infrastructure/product/product_dtos.freezed.dart

@@ -293,6 +293,223 @@ abstract class _ListProductDto extends ListProductDto {
       throw _privateConstructorUsedError;
 }
 
+ProductUnitDto _$ProductUnitDtoFromJson(Map<String, dynamic> json) {
+  return _ProductUnitDto.fromJson(json);
+}
+
+/// @nodoc
+mixin _$ProductUnitDto {
+  @JsonKey(name: "id")
+  String? get id => throw _privateConstructorUsedError;
+  @JsonKey(name: "name")
+  String? get name => throw _privateConstructorUsedError;
+  @JsonKey(name: "abbreviation")
+  String? get abbreviation => throw _privateConstructorUsedError;
+
+  /// Serializes this ProductUnitDto to a JSON map.
+  Map<String, dynamic> toJson() => throw _privateConstructorUsedError;
+
+  /// Create a copy of ProductUnitDto
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  $ProductUnitDtoCopyWith<ProductUnitDto> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
+/// @nodoc
+abstract class $ProductUnitDtoCopyWith<$Res> {
+  factory $ProductUnitDtoCopyWith(
+    ProductUnitDto value,
+    $Res Function(ProductUnitDto) then,
+  ) = _$ProductUnitDtoCopyWithImpl<$Res, ProductUnitDto>;
+  @useResult
+  $Res call({
+    @JsonKey(name: "id") String? id,
+    @JsonKey(name: "name") String? name,
+    @JsonKey(name: "abbreviation") String? abbreviation,
+  });
+}
+
+/// @nodoc
+class _$ProductUnitDtoCopyWithImpl<$Res, $Val extends ProductUnitDto>
+    implements $ProductUnitDtoCopyWith<$Res> {
+  _$ProductUnitDtoCopyWithImpl(this._value, this._then);
+
+  // ignore: unused_field
+  final $Val _value;
+  // ignore: unused_field
+  final $Res Function($Val) _then;
+
+  /// Create a copy of ProductUnitDto
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? id = freezed,
+    Object? name = freezed,
+    Object? abbreviation = freezed,
+  }) {
+    return _then(
+      _value.copyWith(
+            id: freezed == id
+                ? _value.id
+                : id // ignore: cast_nullable_to_non_nullable
+                      as String?,
+            name: freezed == name
+                ? _value.name
+                : name // ignore: cast_nullable_to_non_nullable
+                      as String?,
+            abbreviation: freezed == abbreviation
+                ? _value.abbreviation
+                : abbreviation // ignore: cast_nullable_to_non_nullable
+                      as String?,
+          )
+          as $Val,
+    );
+  }
+}
+
+/// @nodoc
+abstract class _$$ProductUnitDtoImplCopyWith<$Res>
+    implements $ProductUnitDtoCopyWith<$Res> {
+  factory _$$ProductUnitDtoImplCopyWith(
+    _$ProductUnitDtoImpl value,
+    $Res Function(_$ProductUnitDtoImpl) then,
+  ) = __$$ProductUnitDtoImplCopyWithImpl<$Res>;
+  @override
+  @useResult
+  $Res call({
+    @JsonKey(name: "id") String? id,
+    @JsonKey(name: "name") String? name,
+    @JsonKey(name: "abbreviation") String? abbreviation,
+  });
+}
+
+/// @nodoc
+class __$$ProductUnitDtoImplCopyWithImpl<$Res>
+    extends _$ProductUnitDtoCopyWithImpl<$Res, _$ProductUnitDtoImpl>
+    implements _$$ProductUnitDtoImplCopyWith<$Res> {
+  __$$ProductUnitDtoImplCopyWithImpl(
+    _$ProductUnitDtoImpl _value,
+    $Res Function(_$ProductUnitDtoImpl) _then,
+  ) : super(_value, _then);
+
+  /// Create a copy of ProductUnitDto
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? id = freezed,
+    Object? name = freezed,
+    Object? abbreviation = freezed,
+  }) {
+    return _then(
+      _$ProductUnitDtoImpl(
+        id: freezed == id
+            ? _value.id
+            : id // ignore: cast_nullable_to_non_nullable
+                  as String?,
+        name: freezed == name
+            ? _value.name
+            : name // ignore: cast_nullable_to_non_nullable
+                  as String?,
+        abbreviation: freezed == abbreviation
+            ? _value.abbreviation
+            : abbreviation // ignore: cast_nullable_to_non_nullable
+                  as String?,
+      ),
+    );
+  }
+}
+
+/// @nodoc
+@JsonSerializable()
+class _$ProductUnitDtoImpl extends _ProductUnitDto {
+  const _$ProductUnitDtoImpl({
+    @JsonKey(name: "id") this.id,
+    @JsonKey(name: "name") this.name,
+    @JsonKey(name: "abbreviation") this.abbreviation,
+  }) : super._();
+
+  factory _$ProductUnitDtoImpl.fromJson(Map<String, dynamic> json) =>
+      _$$ProductUnitDtoImplFromJson(json);
+
+  @override
+  @JsonKey(name: "id")
+  final String? id;
+  @override
+  @JsonKey(name: "name")
+  final String? name;
+  @override
+  @JsonKey(name: "abbreviation")
+  final String? abbreviation;
+
+  @override
+  String toString() {
+    return 'ProductUnitDto(id: $id, name: $name, abbreviation: $abbreviation)';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    return identical(this, other) ||
+        (other.runtimeType == runtimeType &&
+            other is _$ProductUnitDtoImpl &&
+            (identical(other.id, id) || other.id == id) &&
+            (identical(other.name, name) || other.name == name) &&
+            (identical(other.abbreviation, abbreviation) ||
+                other.abbreviation == abbreviation));
+  }
+
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  int get hashCode => Object.hash(runtimeType, id, name, abbreviation);
+
+  /// Create a copy of ProductUnitDto
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  @pragma('vm:prefer-inline')
+  _$$ProductUnitDtoImplCopyWith<_$ProductUnitDtoImpl> get copyWith =>
+      __$$ProductUnitDtoImplCopyWithImpl<_$ProductUnitDtoImpl>(
+        this,
+        _$identity,
+      );
+
+  @override
+  Map<String, dynamic> toJson() {
+    return _$$ProductUnitDtoImplToJson(this);
+  }
+}
+
+abstract class _ProductUnitDto extends ProductUnitDto {
+  const factory _ProductUnitDto({
+    @JsonKey(name: "id") final String? id,
+    @JsonKey(name: "name") final String? name,
+    @JsonKey(name: "abbreviation") final String? abbreviation,
+  }) = _$ProductUnitDtoImpl;
+  const _ProductUnitDto._() : super._();
+
+  factory _ProductUnitDto.fromJson(Map<String, dynamic> json) =
+      _$ProductUnitDtoImpl.fromJson;
+
+  @override
+  @JsonKey(name: "id")
+  String? get id;
+  @override
+  @JsonKey(name: "name")
+  String? get name;
+  @override
+  @JsonKey(name: "abbreviation")
+  String? get abbreviation;
+
+  /// Create a copy of ProductUnitDto
+  /// with the given fields replaced by the non-null parameter values.
+  @override
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  _$$ProductUnitDtoImplCopyWith<_$ProductUnitDtoImpl> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
 ProductDto _$ProductDtoFromJson(Map<String, dynamic> json) {
   return _ProductDto.fromJson(json);
 }
@@ -321,6 +538,8 @@ mixin _$ProductDto {
   String? get imageUrl => throw _privateConstructorUsedError;
   @JsonKey(name: "printer_type")
   String? get printerType => throw _privateConstructorUsedError;
+  @JsonKey(name: "print_to_checker")
+  bool? get printToChecker => throw _privateConstructorUsedError;
   @JsonKey(name: "metadata")
   Map<String, dynamic>? get metadata => throw _privateConstructorUsedError;
   @JsonKey(name: "is_active")
@@ -331,6 +550,16 @@ mixin _$ProductDto {
   String? get updatedAt => throw _privateConstructorUsedError;
   @JsonKey(name: "variants")
   List<ProductVariantDto>? get variants => throw _privateConstructorUsedError;
+  @JsonKey(name: "sell_by")
+  String? get sellBy => throw _privateConstructorUsedError;
+  @JsonKey(name: "unit_id")
+  String? get unitId => throw _privateConstructorUsedError;
+  @JsonKey(name: "unit_name")
+  String? get unitName => throw _privateConstructorUsedError;
+  @JsonKey(name: "unit_abbreviation")
+  String? get unitAbbreviation => throw _privateConstructorUsedError;
+  @JsonKey(name: "unit")
+  ProductUnitDto? get unit => throw _privateConstructorUsedError;
 
   /// Serializes this ProductDto to a JSON map.
   Map<String, dynamic> toJson() => throw _privateConstructorUsedError;
@@ -361,12 +590,20 @@ abstract class $ProductDtoCopyWith<$Res> {
     @JsonKey(name: "business_type") String? businessType,
     @JsonKey(name: "image_url") String? imageUrl,
     @JsonKey(name: "printer_type") String? printerType,
+    @JsonKey(name: "print_to_checker") bool? printToChecker,
     @JsonKey(name: "metadata") Map<String, dynamic>? metadata,
     @JsonKey(name: "is_active") bool? isActive,
     @JsonKey(name: "created_at") String? createdAt,
     @JsonKey(name: "updated_at") String? updatedAt,
     @JsonKey(name: "variants") List<ProductVariantDto>? variants,
+    @JsonKey(name: "sell_by") String? sellBy,
+    @JsonKey(name: "unit_id") String? unitId,
+    @JsonKey(name: "unit_name") String? unitName,
+    @JsonKey(name: "unit_abbreviation") String? unitAbbreviation,
+    @JsonKey(name: "unit") ProductUnitDto? unit,
   });
+
+  $ProductUnitDtoCopyWith<$Res>? get unit;
 }
 
 /// @nodoc
@@ -395,11 +632,17 @@ class _$ProductDtoCopyWithImpl<$Res, $Val extends ProductDto>
     Object? businessType = freezed,
     Object? imageUrl = freezed,
     Object? printerType = freezed,
+    Object? printToChecker = freezed,
     Object? metadata = freezed,
     Object? isActive = freezed,
     Object? createdAt = freezed,
     Object? updatedAt = freezed,
     Object? variants = freezed,
+    Object? sellBy = freezed,
+    Object? unitId = freezed,
+    Object? unitName = freezed,
+    Object? unitAbbreviation = freezed,
+    Object? unit = freezed,
   }) {
     return _then(
       _value.copyWith(
@@ -447,6 +690,10 @@ class _$ProductDtoCopyWithImpl<$Res, $Val extends ProductDto>
                 ? _value.printerType
                 : printerType // ignore: cast_nullable_to_non_nullable
                       as String?,
+            printToChecker: freezed == printToChecker
+                ? _value.printToChecker
+                : printToChecker // ignore: cast_nullable_to_non_nullable
+                      as bool?,
             metadata: freezed == metadata
                 ? _value.metadata
                 : metadata // ignore: cast_nullable_to_non_nullable
@@ -467,10 +714,44 @@ class _$ProductDtoCopyWithImpl<$Res, $Val extends ProductDto>
                 ? _value.variants
                 : variants // ignore: cast_nullable_to_non_nullable
                       as List<ProductVariantDto>?,
+            sellBy: freezed == sellBy
+                ? _value.sellBy
+                : sellBy // ignore: cast_nullable_to_non_nullable
+                      as String?,
+            unitId: freezed == unitId
+                ? _value.unitId
+                : unitId // ignore: cast_nullable_to_non_nullable
+                      as String?,
+            unitName: freezed == unitName
+                ? _value.unitName
+                : unitName // ignore: cast_nullable_to_non_nullable
+                      as String?,
+            unitAbbreviation: freezed == unitAbbreviation
+                ? _value.unitAbbreviation
+                : unitAbbreviation // ignore: cast_nullable_to_non_nullable
+                      as String?,
+            unit: freezed == unit
+                ? _value.unit
+                : unit // ignore: cast_nullable_to_non_nullable
+                      as ProductUnitDto?,
           )
           as $Val,
     );
   }
+
+  /// Create a copy of ProductDto
+  /// with the given fields replaced by the non-null parameter values.
+  @override
+  @pragma('vm:prefer-inline')
+  $ProductUnitDtoCopyWith<$Res>? get unit {
+    if (_value.unit == null) {
+      return null;
+    }
+
+    return $ProductUnitDtoCopyWith<$Res>(_value.unit!, (value) {
+      return _then(_value.copyWith(unit: value) as $Val);
+    });
+  }
 }
 
 /// @nodoc
@@ -494,12 +775,21 @@ abstract class _$$ProductDtoImplCopyWith<$Res>
     @JsonKey(name: "business_type") String? businessType,
     @JsonKey(name: "image_url") String? imageUrl,
     @JsonKey(name: "printer_type") String? printerType,
+    @JsonKey(name: "print_to_checker") bool? printToChecker,
     @JsonKey(name: "metadata") Map<String, dynamic>? metadata,
     @JsonKey(name: "is_active") bool? isActive,
     @JsonKey(name: "created_at") String? createdAt,
     @JsonKey(name: "updated_at") String? updatedAt,
     @JsonKey(name: "variants") List<ProductVariantDto>? variants,
+    @JsonKey(name: "sell_by") String? sellBy,
+    @JsonKey(name: "unit_id") String? unitId,
+    @JsonKey(name: "unit_name") String? unitName,
+    @JsonKey(name: "unit_abbreviation") String? unitAbbreviation,
+    @JsonKey(name: "unit") ProductUnitDto? unit,
   });
+
+  @override
+  $ProductUnitDtoCopyWith<$Res>? get unit;
 }
 
 /// @nodoc
@@ -527,11 +817,17 @@ class __$$ProductDtoImplCopyWithImpl<$Res>
     Object? businessType = freezed,
     Object? imageUrl = freezed,
     Object? printerType = freezed,
+    Object? printToChecker = freezed,
     Object? metadata = freezed,
     Object? isActive = freezed,
     Object? createdAt = freezed,
     Object? updatedAt = freezed,
     Object? variants = freezed,
+    Object? sellBy = freezed,
+    Object? unitId = freezed,
+    Object? unitName = freezed,
+    Object? unitAbbreviation = freezed,
+    Object? unit = freezed,
   }) {
     return _then(
       _$ProductDtoImpl(
@@ -579,6 +875,10 @@ class __$$ProductDtoImplCopyWithImpl<$Res>
             ? _value.printerType
             : printerType // ignore: cast_nullable_to_non_nullable
                   as String?,
+        printToChecker: freezed == printToChecker
+            ? _value.printToChecker
+            : printToChecker // ignore: cast_nullable_to_non_nullable
+                  as bool?,
         metadata: freezed == metadata
             ? _value._metadata
             : metadata // ignore: cast_nullable_to_non_nullable
@@ -599,6 +899,26 @@ class __$$ProductDtoImplCopyWithImpl<$Res>
             ? _value._variants
             : variants // ignore: cast_nullable_to_non_nullable
                   as List<ProductVariantDto>?,
+        sellBy: freezed == sellBy
+            ? _value.sellBy
+            : sellBy // ignore: cast_nullable_to_non_nullable
+                  as String?,
+        unitId: freezed == unitId
+            ? _value.unitId
+            : unitId // ignore: cast_nullable_to_non_nullable
+                  as String?,
+        unitName: freezed == unitName
+            ? _value.unitName
+            : unitName // ignore: cast_nullable_to_non_nullable
+                  as String?,
+        unitAbbreviation: freezed == unitAbbreviation
+            ? _value.unitAbbreviation
+            : unitAbbreviation // ignore: cast_nullable_to_non_nullable
+                  as String?,
+        unit: freezed == unit
+            ? _value.unit
+            : unit // ignore: cast_nullable_to_non_nullable
+                  as ProductUnitDto?,
       ),
     );
   }
@@ -619,11 +939,17 @@ class _$ProductDtoImpl extends _ProductDto {
     @JsonKey(name: "business_type") this.businessType,
     @JsonKey(name: "image_url") this.imageUrl,
     @JsonKey(name: "printer_type") this.printerType,
+    @JsonKey(name: "print_to_checker") this.printToChecker,
     @JsonKey(name: "metadata") final Map<String, dynamic>? metadata,
     @JsonKey(name: "is_active") this.isActive,
     @JsonKey(name: "created_at") this.createdAt,
     @JsonKey(name: "updated_at") this.updatedAt,
     @JsonKey(name: "variants") final List<ProductVariantDto>? variants,
+    @JsonKey(name: "sell_by") this.sellBy,
+    @JsonKey(name: "unit_id") this.unitId,
+    @JsonKey(name: "unit_name") this.unitName,
+    @JsonKey(name: "unit_abbreviation") this.unitAbbreviation,
+    @JsonKey(name: "unit") this.unit,
   }) : _metadata = metadata,
        _variants = variants,
        super._();
@@ -664,6 +990,9 @@ class _$ProductDtoImpl extends _ProductDto {
   @override
   @JsonKey(name: "printer_type")
   final String? printerType;
+  @override
+  @JsonKey(name: "print_to_checker")
+  final bool? printToChecker;
   final Map<String, dynamic>? _metadata;
   @override
   @JsonKey(name: "metadata")
@@ -695,9 +1024,25 @@ class _$ProductDtoImpl extends _ProductDto {
     return EqualUnmodifiableListView(value);
   }
 
+  @override
+  @JsonKey(name: "sell_by")
+  final String? sellBy;
+  @override
+  @JsonKey(name: "unit_id")
+  final String? unitId;
+  @override
+  @JsonKey(name: "unit_name")
+  final String? unitName;
+  @override
+  @JsonKey(name: "unit_abbreviation")
+  final String? unitAbbreviation;
+  @override
+  @JsonKey(name: "unit")
+  final ProductUnitDto? unit;
+
   @override
   String toString() {
-    return 'ProductDto(id: $id, organizationId: $organizationId, categoryId: $categoryId, sku: $sku, name: $name, description: $description, price: $price, cost: $cost, businessType: $businessType, imageUrl: $imageUrl, printerType: $printerType, metadata: $metadata, isActive: $isActive, createdAt: $createdAt, updatedAt: $updatedAt, variants: $variants)';
+    return 'ProductDto(id: $id, organizationId: $organizationId, categoryId: $categoryId, sku: $sku, name: $name, description: $description, price: $price, cost: $cost, businessType: $businessType, imageUrl: $imageUrl, printerType: $printerType, printToChecker: $printToChecker, metadata: $metadata, isActive: $isActive, createdAt: $createdAt, updatedAt: $updatedAt, variants: $variants, sellBy: $sellBy, unitId: $unitId, unitName: $unitName, unitAbbreviation: $unitAbbreviation, unit: $unit)';
   }
 
   @override
@@ -722,6 +1067,8 @@ class _$ProductDtoImpl extends _ProductDto {
                 other.imageUrl == imageUrl) &&
             (identical(other.printerType, printerType) ||
                 other.printerType == printerType) &&
+            (identical(other.printToChecker, printToChecker) ||
+                other.printToChecker == printToChecker) &&
             const DeepCollectionEquality().equals(other._metadata, _metadata) &&
             (identical(other.isActive, isActive) ||
                 other.isActive == isActive) &&
@@ -729,12 +1076,19 @@ class _$ProductDtoImpl extends _ProductDto {
                 other.createdAt == createdAt) &&
             (identical(other.updatedAt, updatedAt) ||
                 other.updatedAt == updatedAt) &&
-            const DeepCollectionEquality().equals(other._variants, _variants));
+            const DeepCollectionEquality().equals(other._variants, _variants) &&
+            (identical(other.sellBy, sellBy) || other.sellBy == sellBy) &&
+            (identical(other.unitId, unitId) || other.unitId == unitId) &&
+            (identical(other.unitName, unitName) ||
+                other.unitName == unitName) &&
+            (identical(other.unitAbbreviation, unitAbbreviation) ||
+                other.unitAbbreviation == unitAbbreviation) &&
+            (identical(other.unit, unit) || other.unit == unit));
   }
 
   @JsonKey(includeFromJson: false, includeToJson: false)
   @override
-  int get hashCode => Object.hash(
+  int get hashCode => Object.hashAll([
     runtimeType,
     id,
     organizationId,
@@ -747,12 +1101,18 @@ class _$ProductDtoImpl extends _ProductDto {
     businessType,
     imageUrl,
     printerType,
+    printToChecker,
     const DeepCollectionEquality().hash(_metadata),
     isActive,
     createdAt,
     updatedAt,
     const DeepCollectionEquality().hash(_variants),
-  );
+    sellBy,
+    unitId,
+    unitName,
+    unitAbbreviation,
+    unit,
+  ]);
 
   /// Create a copy of ProductDto
   /// with the given fields replaced by the non-null parameter values.
@@ -781,11 +1141,17 @@ abstract class _ProductDto extends ProductDto {
     @JsonKey(name: "business_type") final String? businessType,
     @JsonKey(name: "image_url") final String? imageUrl,
     @JsonKey(name: "printer_type") final String? printerType,
+    @JsonKey(name: "print_to_checker") final bool? printToChecker,
     @JsonKey(name: "metadata") final Map<String, dynamic>? metadata,
     @JsonKey(name: "is_active") final bool? isActive,
     @JsonKey(name: "created_at") final String? createdAt,
     @JsonKey(name: "updated_at") final String? updatedAt,
     @JsonKey(name: "variants") final List<ProductVariantDto>? variants,
+    @JsonKey(name: "sell_by") final String? sellBy,
+    @JsonKey(name: "unit_id") final String? unitId,
+    @JsonKey(name: "unit_name") final String? unitName,
+    @JsonKey(name: "unit_abbreviation") final String? unitAbbreviation,
+    @JsonKey(name: "unit") final ProductUnitDto? unit,
   }) = _$ProductDtoImpl;
   const _ProductDto._() : super._();
 
@@ -826,6 +1192,9 @@ abstract class _ProductDto extends ProductDto {
   @JsonKey(name: "printer_type")
   String? get printerType;
   @override
+  @JsonKey(name: "print_to_checker")
+  bool? get printToChecker;
+  @override
   @JsonKey(name: "metadata")
   Map<String, dynamic>? get metadata;
   @override
@@ -840,6 +1209,21 @@ abstract class _ProductDto extends ProductDto {
   @override
   @JsonKey(name: "variants")
   List<ProductVariantDto>? get variants;
+  @override
+  @JsonKey(name: "sell_by")
+  String? get sellBy;
+  @override
+  @JsonKey(name: "unit_id")
+  String? get unitId;
+  @override
+  @JsonKey(name: "unit_name")
+  String? get unitName;
+  @override
+  @JsonKey(name: "unit_abbreviation")
+  String? get unitAbbreviation;
+  @override
+  @JsonKey(name: "unit")
+  ProductUnitDto? get unit;
 
   /// Create a copy of ProductDto
   /// with the given fields replaced by the non-null parameter values.

lib/infrastructure/product/product_dtos.g.dart

@@ -27,6 +27,21 @@ Map<String, dynamic> _$$ListProductDtoImplToJson(
   'total_pages': instance.totalPages,
 };
 
+_$ProductUnitDtoImpl _$$ProductUnitDtoImplFromJson(Map<String, dynamic> json) =>
+    _$ProductUnitDtoImpl(
+      id: json['id'] as String?,
+      name: json['name'] as String?,
+      abbreviation: json['abbreviation'] as String?,
+    );
+
+Map<String, dynamic> _$$ProductUnitDtoImplToJson(
+  _$ProductUnitDtoImpl instance,
+) => <String, dynamic>{
+  'id': instance.id,
+  'name': instance.name,
+  'abbreviation': instance.abbreviation,
+};
+
 _$ProductDtoImpl _$$ProductDtoImplFromJson(Map<String, dynamic> json) =>
     _$ProductDtoImpl(
       id: json['id'] as String?,
@@ -40,6 +55,7 @@ _$ProductDtoImpl _$$ProductDtoImplFromJson(Map<String, dynamic> json) =>
       businessType: json['business_type'] as String?,
       imageUrl: json['image_url'] as String?,
       printerType: json['printer_type'] as String?,
+      printToChecker: json['print_to_checker'] as bool?,
       metadata: json['metadata'] as Map<String, dynamic>?,
       isActive: json['is_active'] as bool?,
       createdAt: json['created_at'] as String?,
@@ -47,6 +63,13 @@ _$ProductDtoImpl _$$ProductDtoImplFromJson(Map<String, dynamic> json) =>
       variants: (json['variants'] as List<dynamic>?)
           ?.map((e) => ProductVariantDto.fromJson(e as Map<String, dynamic>))
           .toList(),
+      sellBy: json['sell_by'] as String?,
+      unitId: json['unit_id'] as String?,
+      unitName: json['unit_name'] as String?,
+      unitAbbreviation: json['unit_abbreviation'] as String?,
+      unit: json['unit'] == null
+          ? null
+          : ProductUnitDto.fromJson(json['unit'] as Map<String, dynamic>),
     );
 
 Map<String, dynamic> _$$ProductDtoImplToJson(_$ProductDtoImpl instance) =>
@@ -62,11 +85,17 @@ Map<String, dynamic> _$$ProductDtoImplToJson(_$ProductDtoImpl instance) =>
       'business_type': instance.businessType,
       'image_url': instance.imageUrl,
       'printer_type': instance.printerType,
+      'print_to_checker': instance.printToChecker,
       'metadata': instance.metadata,
       'is_active': instance.isActive,
       'created_at': instance.createdAt,
       'updated_at': instance.updatedAt,
       'variants': instance.variants,
+      'sell_by': instance.sellBy,
+      'unit_id': instance.unitId,
+      'unit_name': instance.unitName,
+      'unit_abbreviation': instance.unitAbbreviation,
+      'unit': instance.unit,
     };
 
 _$ProductVariantDtoImpl _$$ProductVariantDtoImplFromJson(

lib/infrastructure/product/repositories/product_repository.dart

@@ -3,6 +3,7 @@ import 'dart:developer';
 import 'package:dartz/dartz.dart';
 import 'package:injectable/injectable.dart';
 
+import '../../../common/service/unit_registry.dart';
 import '../../../domain/product/product.dart';
 import '../datasources/local_data_provider.dart';
 import '../datasources/remote_data_provider.dart';
@@ -12,10 +13,38 @@ import '../product_dtos.dart';
 class ProductRepository implements IProductRepository {
   final ProductRemoteDataProvider _remoteDataProvider;
   final ProductLocalDataProvider _localDataProvider;
+  final UnitRegistry _unitRegistry;
 
   final _logName = 'ProductRepository';
 
-  ProductRepository(this._remoteDataProvider, this._localDataProvider);
+  ProductRepository(
+    this._remoteDataProvider,
+    this._localDataProvider,
+    this._unitRegistry,
+  );
+
+  /// Response produk hanya dijamin membawa `unit_id`. Lengkapi nama dan
+  /// singkatannya dari master satuan supaya keranjang bisa menulis "4,2 ons".
+  Product _withUnit(Product product) {
+    if (!product.isSoldByWeight || product.unitId.isEmpty) return product;
+    if (product.unitAbbreviation.isNotEmpty && product.unitName.isNotEmpty) {
+      return product;
+    }
+
+    final unit = _unitRegistry.byId(product.unitId);
+    if (unit == null) return product;
+
+    return product.copyWith(
+      unitName: product.unitName.isNotEmpty ? product.unitName : unit.name,
+      unitAbbreviation: product.unitAbbreviation.isNotEmpty
+          ? product.unitAbbreviation
+          : unit.abbreviation,
+    );
+  }
+
+  List<Product> _withUnits(List<Product> products) =>
+      products.map(_withUnit).toList();
+
 
   @override
   Future<Either<ProductFailure, Product>> getProductById(String id) async {
@@ -33,7 +62,7 @@ class ProductRepository implements IProductRepository {
         );
       }
 
-      final productDomain = product.data!.toDomain();
+      final productDomain = _withUnit(product.data!.toDomain());
 
       log('✅ Product loaded: ${productDomain.name}', name: _logName);
       return Right(productDomain);
@@ -85,7 +114,9 @@ class ProductRepository implements IProductRepository {
 
       // 🧱 Bangun entity domain ListProduct
       final result = ListProduct(
-        products: cachedProducts.data!.map((p) => p.toDomain()).toList(),
+        products: _withUnits(
+          cachedProducts.data!.map((p) => p.toDomain()).toList(),
+        ),
         totalCount: totalCount,
         page: page,
         limit: limit,
@@ -132,7 +163,9 @@ class ProductRepository implements IProductRepository {
         return left(cachedProducts.error!);
       }
 
-      final products = cachedProducts.data!.map((p) => p.toDomain()).toList();
+      final products = _withUnits(
+        cachedProducts.data!.map((p) => p.toDomain()).toList(),
+      );
 
       final totalCount = await _localDataProvider.getTotalCount(
         categoryId: categoryId,
@@ -180,7 +213,9 @@ class ProductRepository implements IProductRepository {
       }
 
       // ✅ Mapping ke domain entity (kalau hasilnya masih berupa DTO)
-      final products = results.data!.map((p) => p.toDomain()).toList();
+      final products = _withUnits(
+        results.data!.map((p) => p.toDomain()).toList(),
+      );
 
       log(
         '✅ Local search completed: ${products.length} results',
@@ -369,7 +404,7 @@ class ProductRepository implements IProductRepository {
 
       final products = result.data!.toDomain();
 
-      return right(products);
+      return right(products.copyWith(products: _withUnits(products.products)));
     } catch (e, s) {
       log('getProducts', name: _logName, error: e, stackTrace: s);
       return left(const ProductFailure.unexpectedError());

lib/infrastructure/unit/datasources/local_data_provider.dart

@@ -0,0 +1,38 @@
+import 'dart:convert';
+
+import 'package:injectable/injectable.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+import '../../../common/constant/local_storage_key.dart';
+import '../unit_dtos.dart';
+
+/// Satuan berjumlah sedikit dan jarang berubah, jadi cukup disimpan sebagai
+/// satu blob JSON di SharedPreferences — tidak perlu tabel sqflite sendiri.
+@injectable
+class UnitLocalDataProvider {
+  final SharedPreferences _sharedPreferences;
+
+  UnitLocalDataProvider(this._sharedPreferences);
+
+  Future<void> saveUnits(List<UnitDto> units) async {
+    final jsonString = jsonEncode(units.map((e) => e.toJson()).toList());
+    await _sharedPreferences.setString(LocalStorageKey.units, jsonString);
+  }
+
+  List<UnitDto> getUnits() {
+    final jsonString = _sharedPreferences.getString(LocalStorageKey.units);
+    if (jsonString == null || jsonString.isEmpty) return const [];
+
+    final decoded = jsonDecode(jsonString);
+    if (decoded is! List) return const [];
+
+    return decoded
+        .whereType<Map<String, dynamic>>()
+        .map(UnitDto.fromJson)
+        .toList();
+  }
+
+  Future<void> clearUnits() async {
+    await _sharedPreferences.remove(LocalStorageKey.units);
+  }
+}

lib/infrastructure/unit/datasources/remote_data_provider.dart

@@ -0,0 +1,37 @@
+import 'dart:developer';
+
+import 'package:data_channel/data_channel.dart';
+import 'package:injectable/injectable.dart';
+
+import '../../../common/api/api_client.dart';
+import '../../../common/api/api_failure.dart';
+import '../../../common/function/app_function.dart';
+import '../../../common/url/api_path.dart';
+import '../../../domain/unit/unit.dart';
+import '../unit_dtos.dart';
+
+@injectable
+class UnitRemoteDataProvider {
+  final ApiClient _apiClient;
+  final _logName = 'UnitRemoteDataProvider';
+
+  UnitRemoteDataProvider(this._apiClient);
+
+  Future<DC<UnitFailure, List<UnitDto>>> fetchUnits() async {
+    try {
+      final response = await _apiClient.get(
+        ApiPath.units,
+        headers: getAuthorizationHeader(),
+      );
+
+      if (response.data['data'] == null) {
+        return DC.error(const UnitFailure.empty());
+      }
+
+      return DC.data(UnitDto.listFromResponse(response.data['data']));
+    } on ApiFailure catch (e, s) {
+      log('fetchUnitsError', name: _logName, error: e, stackTrace: s);
+      return DC.error(UnitFailure.serverError(e));
+    }
+  }
+}

lib/infrastructure/unit/dtos/unit_dto.dart

@@ -0,0 +1,59 @@
+part of '../unit_dtos.dart';
+
+@freezed
+class UnitDto with _$UnitDto {
+  const UnitDto._();
+
+  const factory UnitDto({
+    @JsonKey(name: "id") String? id,
+    @JsonKey(name: "organization_id") String? organizationId,
+    @JsonKey(name: "name") String? name,
+    @JsonKey(name: "abbreviation") String? abbreviation,
+    @JsonKey(name: "is_active") bool? isActive,
+  }) = _UnitDto;
+
+  factory UnitDto.fromJson(Map<String, dynamic> json) =>
+      _$UnitDtoFromJson(json);
+
+  ProductUnit toDomain() => ProductUnit(
+    id: id ?? '',
+    organizationId: organizationId ?? '',
+    name: name ?? '',
+    abbreviation: abbreviation ?? '',
+    isActive: isActive ?? true,
+  );
+
+  factory UnitDto.fromDomain(ProductUnit unit) => UnitDto(
+    id: unit.id,
+    organizationId: unit.organizationId,
+    name: unit.name,
+    abbreviation: unit.abbreviation,
+    isActive: unit.isActive,
+  );
+
+  /// Response `/units` belum tentu berbentuk sama di setiap versi backend —
+  /// bisa `data: [...]` atau `data: { units: [...] }`. Terima keduanya supaya
+  /// POS tidak kehilangan satuan hanya karena pembungkusnya berbeda.
+  static List<UnitDto> listFromResponse(dynamic data) {
+    if (data is List) {
+      return data
+          .whereType<Map<String, dynamic>>()
+          .map(UnitDto.fromJson)
+          .toList();
+    }
+
+    if (data is Map<String, dynamic>) {
+      for (final key in const ['units', 'items', 'data']) {
+        final value = data[key];
+        if (value is List) {
+          return value
+              .whereType<Map<String, dynamic>>()
+              .map(UnitDto.fromJson)
+              .toList();
+        }
+      }
+    }
+
+    return const [];
+  }
+}

lib/infrastructure/unit/repositories/unit_repository.dart

@@ -0,0 +1,56 @@
+import 'dart:developer';
+
+import 'package:dartz/dartz.dart';
+import 'package:injectable/injectable.dart';
+
+import '../../../domain/unit/unit.dart';
+import '../datasources/local_data_provider.dart';
+import '../datasources/remote_data_provider.dart';
+
+@Injectable(as: IUnitRepository)
+class UnitRepository implements IUnitRepository {
+  final UnitRemoteDataProvider _remoteDataProvider;
+  final UnitLocalDataProvider _localDataProvider;
+
+  final _logName = 'UnitRepository';
+
+  UnitRepository(this._remoteDataProvider, this._localDataProvider);
+
+  @override
+  Future<Either<UnitFailure, List<ProductUnit>>> getUnits({
+    bool forceRefresh = false,
+  }) async {
+    try {
+      final cached = _localDataProvider.getUnits();
+
+      if (!forceRefresh && cached.isNotEmpty) {
+        log('📏 ${cached.length} satuan dari cache', name: _logName);
+        return right(cached.map((e) => e.toDomain()).toList());
+      }
+
+      final result = await _remoteDataProvider.fetchUnits();
+
+      if (result.hasError) {
+        // Offline bukan alasan untuk kehilangan satuan yang sudah pernah ada.
+        if (cached.isNotEmpty) {
+          log('⚠️ Gagal ambil satuan, pakai cache', name: _logName);
+          return right(cached.map((e) => e.toDomain()).toList());
+        }
+        return left(result.error!);
+      }
+
+      final units = result.data!;
+      await _localDataProvider.saveUnits(units);
+
+      log('✅ ${units.length} satuan disinkronkan', name: _logName);
+      return right(units.map((e) => e.toDomain()).toList());
+    } catch (e, s) {
+      log('❌ Error getUnits', name: _logName, error: e, stackTrace: s);
+      return left(UnitFailure.localStorageError(e.toString()));
+    }
+  }
+
+  @override
+  Future<List<ProductUnit>> cachedUnits() async =>
+      _localDataProvider.getUnits().map((e) => e.toDomain()).toList();
+}

lib/infrastructure/unit/unit_dtos.dart

@@ -0,0 +1,8 @@
+import 'package:freezed_annotation/freezed_annotation.dart';
+
+import '../../domain/unit/unit.dart';
+
+part 'unit_dtos.freezed.dart';
+part 'unit_dtos.g.dart';
+
+part 'dtos/unit_dto.dart';

lib/infrastructure/unit/unit_dtos.freezed.dart

@@ -0,0 +1,280 @@
+// coverage:ignore-file
+// GENERATED CODE - DO NOT MODIFY BY HAND
+// ignore_for_file: type=lint
+// ignore_for_file: unused_element, deprecated_member_use, deprecated_member_use_from_same_package, use_function_type_syntax_for_parameters, unnecessary_const, avoid_init_to_null, invalid_override_different_default_values_named, prefer_expression_function_bodies, annotate_overrides, invalid_annotation_target, unnecessary_question_mark
+
+part of 'unit_dtos.dart';
+
+// **************************************************************************
+// FreezedGenerator
+// **************************************************************************
+
+T _$identity<T>(T value) => value;
+
+final _privateConstructorUsedError = UnsupportedError(
+  'It seems like you constructed your class using `MyClass._()`. This constructor is only meant to be used by freezed and you are not supposed to need it nor use it.\nPlease check the documentation here for more information: https://github.com/rrousselGit/freezed#adding-getters-and-methods-to-our-models',
+);
+
+UnitDto _$UnitDtoFromJson(Map<String, dynamic> json) {
+  return _UnitDto.fromJson(json);
+}
+
+/// @nodoc
+mixin _$UnitDto {
+  @JsonKey(name: "id")
+  String? get id => throw _privateConstructorUsedError;
+  @JsonKey(name: "organization_id")
+  String? get organizationId => throw _privateConstructorUsedError;
+  @JsonKey(name: "name")
+  String? get name => throw _privateConstructorUsedError;
+  @JsonKey(name: "abbreviation")
+  String? get abbreviation => throw _privateConstructorUsedError;
+  @JsonKey(name: "is_active")
+  bool? get isActive => throw _privateConstructorUsedError;
+
+  /// Serializes this UnitDto to a JSON map.
+  Map<String, dynamic> toJson() => throw _privateConstructorUsedError;
+
+  /// Create a copy of UnitDto
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  $UnitDtoCopyWith<UnitDto> get copyWith => throw _privateConstructorUsedError;
+}
+
+/// @nodoc
+abstract class $UnitDtoCopyWith<$Res> {
+  factory $UnitDtoCopyWith(UnitDto value, $Res Function(UnitDto) then) =
+      _$UnitDtoCopyWithImpl<$Res, UnitDto>;
+  @useResult
+  $Res call({
+    @JsonKey(name: "id") String? id,
+    @JsonKey(name: "organization_id") String? organizationId,
+    @JsonKey(name: "name") String? name,
+    @JsonKey(name: "abbreviation") String? abbreviation,
+    @JsonKey(name: "is_active") bool? isActive,
+  });
+}
+
+/// @nodoc
+class _$UnitDtoCopyWithImpl<$Res, $Val extends UnitDto>
+    implements $UnitDtoCopyWith<$Res> {
+  _$UnitDtoCopyWithImpl(this._value, this._then);
+
+  // ignore: unused_field
+  final $Val _value;
+  // ignore: unused_field
+  final $Res Function($Val) _then;
+
+  /// Create a copy of UnitDto
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? id = freezed,
+    Object? organizationId = freezed,
+    Object? name = freezed,
+    Object? abbreviation = freezed,
+    Object? isActive = freezed,
+  }) {
+    return _then(
+      _value.copyWith(
+            id: freezed == id
+                ? _value.id
+                : id // ignore: cast_nullable_to_non_nullable
+                      as String?,
+            organizationId: freezed == organizationId
+                ? _value.organizationId
+                : organizationId // ignore: cast_nullable_to_non_nullable
+                      as String?,
+            name: freezed == name
+                ? _value.name
+                : name // ignore: cast_nullable_to_non_nullable
+                      as String?,
+            abbreviation: freezed == abbreviation
+                ? _value.abbreviation
+                : abbreviation // ignore: cast_nullable_to_non_nullable
+                      as String?,
+            isActive: freezed == isActive
+                ? _value.isActive
+                : isActive // ignore: cast_nullable_to_non_nullable
+                      as bool?,
+          )
+          as $Val,
+    );
+  }
+}
+
+/// @nodoc
+abstract class _$$UnitDtoImplCopyWith<$Res> implements $UnitDtoCopyWith<$Res> {
+  factory _$$UnitDtoImplCopyWith(
+    _$UnitDtoImpl value,
+    $Res Function(_$UnitDtoImpl) then,
+  ) = __$$UnitDtoImplCopyWithImpl<$Res>;
+  @override
+  @useResult
+  $Res call({
+    @JsonKey(name: "id") String? id,
+    @JsonKey(name: "organization_id") String? organizationId,
+    @JsonKey(name: "name") String? name,
+    @JsonKey(name: "abbreviation") String? abbreviation,
+    @JsonKey(name: "is_active") bool? isActive,
+  });
+}
+
+/// @nodoc
+class __$$UnitDtoImplCopyWithImpl<$Res>
+    extends _$UnitDtoCopyWithImpl<$Res, _$UnitDtoImpl>
+    implements _$$UnitDtoImplCopyWith<$Res> {
+  __$$UnitDtoImplCopyWithImpl(
+    _$UnitDtoImpl _value,
+    $Res Function(_$UnitDtoImpl) _then,
+  ) : super(_value, _then);
+
+  /// Create a copy of UnitDto
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? id = freezed,
+    Object? organizationId = freezed,
+    Object? name = freezed,
+    Object? abbreviation = freezed,
+    Object? isActive = freezed,
+  }) {
+    return _then(
+      _$UnitDtoImpl(
+        id: freezed == id
+            ? _value.id
+            : id // ignore: cast_nullable_to_non_nullable
+                  as String?,
+        organizationId: freezed == organizationId
+            ? _value.organizationId
+            : organizationId // ignore: cast_nullable_to_non_nullable
+                  as String?,
+        name: freezed == name
+            ? _value.name
+            : name // ignore: cast_nullable_to_non_nullable
+                  as String?,
+        abbreviation: freezed == abbreviation
+            ? _value.abbreviation
+            : abbreviation // ignore: cast_nullable_to_non_nullable
+                  as String?,
+        isActive: freezed == isActive
+            ? _value.isActive
+            : isActive // ignore: cast_nullable_to_non_nullable
+                  as bool?,
+      ),
+    );
+  }
+}
+
+/// @nodoc
+@JsonSerializable()
+class _$UnitDtoImpl extends _UnitDto {
+  const _$UnitDtoImpl({
+    @JsonKey(name: "id") this.id,
+    @JsonKey(name: "organization_id") this.organizationId,
+    @JsonKey(name: "name") this.name,
+    @JsonKey(name: "abbreviation") this.abbreviation,
+    @JsonKey(name: "is_active") this.isActive,
+  }) : super._();
+
+  factory _$UnitDtoImpl.fromJson(Map<String, dynamic> json) =>
+      _$$UnitDtoImplFromJson(json);
+
+  @override
+  @JsonKey(name: "id")
+  final String? id;
+  @override
+  @JsonKey(name: "organization_id")
+  final String? organizationId;
+  @override
+  @JsonKey(name: "name")
+  final String? name;
+  @override
+  @JsonKey(name: "abbreviation")
+  final String? abbreviation;
+  @override
+  @JsonKey(name: "is_active")
+  final bool? isActive;
+
+  @override
+  String toString() {
+    return 'UnitDto(id: $id, organizationId: $organizationId, name: $name, abbreviation: $abbreviation, isActive: $isActive)';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    return identical(this, other) ||
+        (other.runtimeType == runtimeType &&
+            other is _$UnitDtoImpl &&
+            (identical(other.id, id) || other.id == id) &&
+            (identical(other.organizationId, organizationId) ||
+                other.organizationId == organizationId) &&
+            (identical(other.name, name) || other.name == name) &&
+            (identical(other.abbreviation, abbreviation) ||
+                other.abbreviation == abbreviation) &&
+            (identical(other.isActive, isActive) ||
+                other.isActive == isActive));
+  }
+
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  int get hashCode => Object.hash(
+    runtimeType,
+    id,
+    organizationId,
+    name,
+    abbreviation,
+    isActive,
+  );
+
+  /// Create a copy of UnitDto
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  @pragma('vm:prefer-inline')
+  _$$UnitDtoImplCopyWith<_$UnitDtoImpl> get copyWith =>
+      __$$UnitDtoImplCopyWithImpl<_$UnitDtoImpl>(this, _$identity);
+
+  @override
+  Map<String, dynamic> toJson() {
+    return _$$UnitDtoImplToJson(this);
+  }
+}
+
+abstract class _UnitDto extends UnitDto {
+  const factory _UnitDto({
+    @JsonKey(name: "id") final String? id,
+    @JsonKey(name: "organization_id") final String? organizationId,
+    @JsonKey(name: "name") final String? name,
+    @JsonKey(name: "abbreviation") final String? abbreviation,
+    @JsonKey(name: "is_active") final bool? isActive,
+  }) = _$UnitDtoImpl;
+  const _UnitDto._() : super._();
+
+  factory _UnitDto.fromJson(Map<String, dynamic> json) = _$UnitDtoImpl.fromJson;
+
+  @override
+  @JsonKey(name: "id")
+  String? get id;
+  @override
+  @JsonKey(name: "organization_id")
+  String? get organizationId;
+  @override
+  @JsonKey(name: "name")
+  String? get name;
+  @override
+  @JsonKey(name: "abbreviation")
+  String? get abbreviation;
+  @override
+  @JsonKey(name: "is_active")
+  bool? get isActive;
+
+  /// Create a copy of UnitDto
+  /// with the given fields replaced by the non-null parameter values.
+  @override
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  _$$UnitDtoImplCopyWith<_$UnitDtoImpl> get copyWith =>
+      throw _privateConstructorUsedError;
+}

lib/infrastructure/unit/unit_dtos.g.dart

@@ -0,0 +1,25 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'unit_dtos.dart';
+
+// **************************************************************************
+// JsonSerializableGenerator
+// **************************************************************************
+
+_$UnitDtoImpl _$$UnitDtoImplFromJson(Map<String, dynamic> json) =>
+    _$UnitDtoImpl(
+      id: json['id'] as String?,
+      organizationId: json['organization_id'] as String?,
+      name: json['name'] as String?,
+      abbreviation: json['abbreviation'] as String?,
+      isActive: json['is_active'] as bool?,
+    );
+
+Map<String, dynamic> _$$UnitDtoImplToJson(_$UnitDtoImpl instance) =>
+    <String, dynamic>{
+      'id': instance.id,
+      'organization_id': instance.organizationId,
+      'name': instance.name,
+      'abbreviation': instance.abbreviation,
+      'is_active': instance.isActive,
+    };

lib/injection.config.dart

@@ -88,6 +88,8 @@ import 'package:apskel_pos_flutter_v2/common/network/network_client.dart'
 import 'package:apskel_pos_flutter_v2/common/service/device_info_service.dart'
     as _i288;
 import 'package:apskel_pos_flutter_v2/common/service/fcm_service.dart' as _i312;
+import 'package:apskel_pos_flutter_v2/common/service/unit_registry.dart'
+    as _i584;
 import 'package:apskel_pos_flutter_v2/domain/analytic/analytic.dart' as _i346;
 import 'package:apskel_pos_flutter_v2/domain/auth/auth.dart' as _i776;
 import 'package:apskel_pos_flutter_v2/domain/category/category.dart' as _i502;
@@ -99,6 +101,7 @@ import 'package:apskel_pos_flutter_v2/domain/payment_method/payment_method.dart'
 import 'package:apskel_pos_flutter_v2/domain/printer/printer.dart' as _i104;
 import 'package:apskel_pos_flutter_v2/domain/product/product.dart' as _i44;
 import 'package:apskel_pos_flutter_v2/domain/table/table.dart' as _i983;
+import 'package:apskel_pos_flutter_v2/domain/unit/unit.dart' as _i320;
 import 'package:apskel_pos_flutter_v2/env.dart' as _i923;
 import 'package:apskel_pos_flutter_v2/infrastructure/analytic/datasources/remote_data_provider.dart'
     as _i708;
@@ -148,6 +151,12 @@ import 'package:apskel_pos_flutter_v2/infrastructure/table/datasources/remote_da
     as _i95;
 import 'package:apskel_pos_flutter_v2/infrastructure/table/repositories/table_repository.dart'
     as _i824;
+import 'package:apskel_pos_flutter_v2/infrastructure/unit/datasources/local_data_provider.dart'
+    as _i393;
+import 'package:apskel_pos_flutter_v2/infrastructure/unit/datasources/remote_data_provider.dart'
+    as _i1016;
+import 'package:apskel_pos_flutter_v2/infrastructure/unit/repositories/unit_repository.dart'
+    as _i228;
 import 'package:apskel_pos_flutter_v2/presentation/router/app_router.dart'
     as _i800;
 import 'package:connectivity_plus/connectivity_plus.dart' as _i895;
@@ -229,11 +238,14 @@ extension GetItInjectableX on _i174.GetIt {
     gh.factory<_i693.OutletLocalDatasource>(
       () => _i693.OutletLocalDatasource(gh<_i460.SharedPreferences>()),
     );
+    gh.factory<_i393.UnitLocalDataProvider>(
+      () => _i393.UnitLocalDataProvider(gh<_i460.SharedPreferences>()),
+    );
     gh.lazySingleton<_i457.ApiClient>(
       () => _i457.ApiClient(gh<_i361.Dio>(), gh<_i923.Env>()),
     );
     gh.factory<_i923.Env>(() => _i923.ProdEnv(), registerFor: {_prod});
-    gh.factory<_i104.IPrinterRepository>(
+    gh.lazySingleton<_i104.IPrinterRepository>(
       () => _i881.PrinterRepository(
         gh<_i149.PrinterLocalDataProvider>(),
         gh<_i693.OutletLocalDatasource>(),
@@ -279,6 +291,9 @@ extension GetItInjectableX on _i174.GetIt {
     gh.factory<_i95.TableRemoteDataProvider>(
       () => _i95.TableRemoteDataProvider(gh<_i457.ApiClient>()),
     );
+    gh.factory<_i1016.UnitRemoteDataProvider>(
+      () => _i1016.UnitRemoteDataProvider(gh<_i457.ApiClient>()),
+    );
     gh.factory<_i776.IAuthRepository>(
       () => _i941.AuthRepository(
         gh<_i370.AuthRemoteDataProvider>(),
@@ -291,13 +306,6 @@ extension GetItInjectableX on _i174.GetIt {
         gh<_i708.CategoryLocalDataProvider>(),
       ),
     );
-    gh.factory<_i46.LoginFormBloc>(
-      () => _i46.LoginFormBloc(
-        gh<_i776.IAuthRepository>(),
-        gh<_i312.FcmService>(),
-        gh<_i288.DeviceInfoService>(),
-      ),
-    );
     gh.factory<_i983.ITableRepository>(
       () => _i824.TableRepository(
         gh<_i95.TableRemoteDataProvider>(),
@@ -313,12 +321,6 @@ extension GetItInjectableX on _i174.GetIt {
     gh.factory<_i424.TableLoaderBloc>(
       () => _i424.TableLoaderBloc(gh<_i983.ITableRepository>()),
     );
-    gh.factory<_i44.IProductRepository>(
-      () => _i763.ProductRepository(
-        gh<_i707.ProductRemoteDataProvider>(),
-        gh<_i464.ProductLocalDataProvider>(),
-      ),
-    );
     gh.factory<_i552.IOutletRepository>(
       () => _i845.OutletRepository(
         gh<_i132.OutletRemoteDataProvider>(),
@@ -342,6 +344,12 @@ extension GetItInjectableX on _i174.GetIt {
         gh<_i552.IOutletRepository>(),
       ),
     );
+    gh.factory<_i320.IUnitRepository>(
+      () => _i228.UnitRepository(
+        gh<_i1016.UnitRemoteDataProvider>(),
+        gh<_i393.UnitLocalDataProvider>(),
+      ),
+    );
     gh.factory<_i143.ICustomerRepository>(
       () => _i385.CustomerRepository(gh<_i841.CustomerRemoteDataProvider>()),
     );
@@ -363,6 +371,9 @@ extension GetItInjectableX on _i174.GetIt {
     gh.factory<_i822.VoidFormBloc>(
       () => _i822.VoidFormBloc(gh<_i299.IOrderRepository>()),
     );
+    gh.lazySingleton<_i584.UnitRegistry>(
+      () => _i584.UnitRegistry(gh<_i320.IUnitRepository>()),
+    );
     gh.factory<_i683.CustomerLoaderBloc>(
       () => _i683.CustomerLoaderBloc(gh<_i143.ICustomerRepository>()),
     );
@@ -381,19 +392,19 @@ extension GetItInjectableX on _i174.GetIt {
     gh.factory<_i76.OutletLoaderBloc>(
       () => _i76.OutletLoaderBloc(gh<_i552.IOutletRepository>()),
     );
-    gh.factory<_i13.ProductLoaderBloc>(
+    gh.factory<_i46.LoginFormBloc>(
-      () => _i13.ProductLoaderBloc(gh<_i44.IProductRepository>()),
+      () => _i46.LoginFormBloc(
-    );
+        gh<_i776.IAuthRepository>(),
-    gh.factory<_i741.SyncBloc>(
+        gh<_i312.FcmService>(),
-      () => _i741.SyncBloc(
+        gh<_i288.DeviceInfoService>(),
-        gh<_i44.IProductRepository>(),
+        gh<_i584.UnitRegistry>(),
-        gh<_i502.ICategoryRepository>(),
       ),
     );
-    gh.factory<_i729.SyncSettingBloc>(
+    gh.factory<_i44.IProductRepository>(
-      () => _i729.SyncSettingBloc(
+      () => _i763.ProductRepository(
-        gh<_i44.IProductRepository>(),
+        gh<_i707.ProductRemoteDataProvider>(),
-        gh<_i502.ICategoryRepository>(),
+        gh<_i464.ProductLocalDataProvider>(),
+        gh<_i584.UnitRegistry>(),
       ),
     );
     gh.factory<_i911.CategoryAnalyticLoaderBloc>(
@@ -419,6 +430,22 @@ extension GetItInjectableX on _i174.GetIt {
     gh.factory<_i413.SalesAnalyticLoaderBloc>(
       () => _i413.SalesAnalyticLoaderBloc(gh<_i346.IAnalyticRepository>()),
     );
+    gh.factory<_i729.SyncSettingBloc>(
+      () => _i729.SyncSettingBloc(
+        gh<_i44.IProductRepository>(),
+        gh<_i502.ICategoryRepository>(),
+        gh<_i584.UnitRegistry>(),
+      ),
+    );
+    gh.factory<_i13.ProductLoaderBloc>(
+      () => _i13.ProductLoaderBloc(gh<_i44.IProductRepository>()),
+    );
+    gh.factory<_i741.SyncBloc>(
+      () => _i741.SyncBloc(
+        gh<_i44.IProductRepository>(),
+        gh<_i502.ICategoryRepository>(),
+      ),
+    );
     return this;
   }
 }

lib/main.dart

@@ -5,9 +5,9 @@ import 'package:firebase_crashlytics/firebase_crashlytics.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
-import 'package:injectable/injectable.dart';
 
 import 'common/service/fcm_service.dart';
+import 'common/service/unit_registry.dart';
 import 'injection.dart';
 import 'presentation/app_widget.dart';
 
@@ -44,13 +44,16 @@ void main() async {
         debugPrint = (message, {wrapWidth}) => '';
       }
 
-      await configureDependencies(
+      const String env = String.fromEnvironment('ENV', defaultValue: 'dev');
-        kReleaseMode ? Environment.prod : Environment.dev,
+      await configureDependencies(env);
-      );
 
       // Inisialisasi FCM setelah DI siap
       await getIt<FcmService>().initialize();
 
+      // Master satuan dimuat dari cache lebih dulu supaya produk timbangan
+      // langsung punya label satuan, bahkan saat perangkat offline.
+      unawaited(getIt<UnitRegistry>().load());
+
       runApp(const AppWidget());
     },
     (error, stack) {

lib/presentation/app_widget.dart

@@ -13,8 +13,6 @@ import '../application/payment_method/payment_method_loader/payment_method_loade
 import '../application/printer/bluetooth/bluetooth_connect/bluetooth_connect_bloc.dart';
 import '../application/printer/bluetooth/bluetooth_loader/bluetooth_loader_bloc.dart';
 import '../application/printer/print_struck/print_struck_bloc.dart';
-import '../application/printer/printer_form/printer_form_bloc.dart';
-import '../application/printer/printer_loader/printer_loader_bloc.dart';
 import '../application/product/product_loader/product_loader_bloc.dart';
 import '../application/sync/sync_setting/sync_setting_bloc.dart';
 import '../application/table/table_form/table_form_bloc.dart';
@@ -23,6 +21,7 @@ import '../application/void/void_form/void_form_bloc.dart';
 import '../common/theme/theme.dart';
 import '../common/constant/app_constant.dart';
 import '../injection.dart';
+import 'components/dialog/dialog.dart';
 import 'router/app_router.dart';
 import 'router/app_router_observer.dart';
 
@@ -54,8 +53,9 @@ class _AppWidgetState extends State<AppWidget> {
         BlocProvider(create: (context) => getIt<VoidFormBloc>()),
         BlocProvider(create: (context) => getIt<BluetoothLoaderBloc>()),
         BlocProvider(create: (context) => getIt<BluetoothConnectBloc>()),
-        BlocProvider(create: (context) => getIt<PrinterFormBloc>()),
+        // PrinterFormBloc dan PrinterLoaderBloc sengaja TIDAK global: tiap tab
-        BlocProvider(create: (context) => getIt<PrinterLoaderBloc>()),
+        // pengaturan printer memakai instance sendiri, lihat
+        // SettingPrinterSection.
         BlocProvider(create: (context) => getIt<PrintStruckBloc>()),
         BlocProvider(create: (context) => getIt<SyncSettingBloc>()),
         BlocProvider(create: (context) => getIt<LogoutBloc>()),
@@ -67,6 +67,20 @@ class _AppWidgetState extends State<AppWidget> {
         routerConfig: _appRouter.config(
           navigatorObservers: () => <NavigatorObserver>[AppRouteObserver()],
         ),
+        // Satu listener untuk seluruh aplikasi: cetak bisa dipicu dari banyak
+        // halaman, dan `PrintStruckBloc` hidup di atas router jadi prosesnya
+        // tetap jalan walau kasir sudah pindah halaman.
+        builder: (context, child) => BlocListener<PrintStruckBloc, PrintStruckState>(
+          listenWhen: (previous, current) => previous.jobId != current.jobId,
+          listener: (_, __) {
+            // Dialog harus dibuka dari context di bawah Navigator, sementara
+            // builder ini berada di atasnya.
+            final navigatorContext = _appRouter.navigatorKey.currentContext;
+            if (navigatorContext == null) return;
+            showPrintProgressDialog(navigatorContext);
+          },
+          child: child ?? const SizedBox.shrink(),
+        ),
       ),
     );
   }

lib/presentation/components/card/order_menu.dart

@@ -5,6 +5,7 @@ import '../../../application/checkout/checkout_form/checkout_form_bloc.dart';
 import '../../../common/extension/extension.dart';
 import '../../../common/theme/theme.dart';
 import '../../../domain/product/product.dart';
+import '../dialog/dialog.dart';
 import '../image/image.dart';
 import '../spaces/space.dart';
 
@@ -26,8 +27,8 @@ class _OrderMenuState extends State<OrderMenu> {
 
     _controller.addListener(() {
       context.read<CheckoutFormBloc>().add(
-        CheckoutFormEvent.updateItemNotes(
+        CheckoutFormEvent.updateLineNotes(
-          widget.data.product,
+          widget.data.lineId,
           _controller.text,
         ),
       );
@@ -40,6 +41,29 @@ class _OrderMenuState extends State<OrderMenu> {
     super.dispose();
   }
 
+  void _removeLine() {
+    context.read<CheckoutFormBloc>().add(
+      CheckoutFormEvent.removeLine(widget.data.lineId),
+    );
+  }
+
+  /// Koreksi salah timbang: ubah angka pada baris yang sama, bukan menambah
+  /// baris baru.
+  void _editWeight() {
+    final bloc = context.read<CheckoutFormBloc>();
+    showDialog(
+      context: context,
+      builder: (context) => WeightInputDialog(
+        product: widget.data.product,
+        variant: widget.data.variant,
+        initialWeight: widget.data.weight,
+        onSubmit: (weight) => bloc.add(
+          CheckoutFormEvent.updateItemWeight(widget.data.lineId, weight),
+        ),
+      ),
+    );
+  }
+
   @override
   Widget build(BuildContext context) {
     return Column(
@@ -77,9 +101,10 @@ class _OrderMenuState extends State<OrderMenu> {
                   crossAxisAlignment: CrossAxisAlignment.start,
                   children: [
                     Text(
-                      (widget.data.product.price +
+                      widget.data.isWeighted &&
-                              (widget.data.variant?.priceModifier ?? 0))
+                              widget.data.product.unitLabel.isNotEmpty
-                          .currencyFormatRp,
+                          ? '${widget.data.unitPrice.currencyFormatRp} / ${widget.data.product.unitLabel}'
+                          : widget.data.unitPrice.currencyFormatRp,
                     ),
                     if (widget.data.variant != null)
                       Text(widget.data.variant?.name ?? ""),
@@ -87,60 +112,15 @@ class _OrderMenuState extends State<OrderMenu> {
                 ),
               ),
             ),
-            Row(
+            if (widget.data.isWeighted)
-              children: [
+              _buildWeightControl()
-                GestureDetector(
+            else
-                  onTap: () {
+              _buildQuantityStepper(),
-                    context.read<CheckoutFormBloc>().add(
-                      CheckoutFormEvent.removeItem(
-                        widget.data.product,
-                        widget.data.variant,
-                      ),
-                    );
-                  },
-                  child: Container(
-                    width: 30,
-                    height: 30,
-                    color: AppColor.white,
-                    child: const Icon(
-                      Icons.remove_circle,
-                      color: AppColor.primary,
-                    ),
-                  ),
-                ),
-                SizedBox(
-                  width: 30.0,
-                  child: Center(child: Text(widget.data.quantity.toString())),
-                ),
-                GestureDetector(
-                  onTap: () {
-                    context.read<CheckoutFormBloc>().add(
-                      CheckoutFormEvent.addItem(
-                        widget.data.product,
-                        widget.data.variant,
-                      ),
-                    );
-                  },
-                  child: Container(
-                    width: 30,
-                    height: 30,
-                    color: AppColor.white,
-                    child: const Icon(
-                      Icons.add_circle,
-                      color: AppColor.primary,
-                    ),
-                  ),
-                ),
-              ],
-            ),
             const SpaceWidth(8),
             SizedBox(
               width: 80.0,
               child: Text(
-                ((widget.data.product.price +
+                widget.data.lineTotal.currencyFormatRp,
-                            (widget.data.variant?.priceModifier ?? 0)) *
-                        widget.data.quantity)
-                    .currencyFormatRp,
                 textAlign: TextAlign.right,
                 style: const TextStyle(
                   color: AppColor.primary,
@@ -167,14 +147,7 @@ class _OrderMenuState extends State<OrderMenu> {
               ),
               const SpaceWidth(16.0),
               GestureDetector(
-                onTap: () {
+                onTap: _removeLine,
-                  context.read<CheckoutFormBloc>().add(
-                    CheckoutFormEvent.removeItem(
-                      widget.data.product,
-                      widget.data.variant,
-                    ),
-                  );
-                },
                 child: Container(
                   height: 40,
                   width: 40,
@@ -194,4 +167,77 @@ class _OrderMenuState extends State<OrderMenu> {
       ],
     );
   }
+
+  /// Baris berbobot tidak punya stepper — nilainya bukan cacah, dan angka 1
+  /// yang tersimpan di `quantity` akan terbaca seperti "satu ons".
+  Widget _buildWeightControl() {
+    return GestureDetector(
+      onTap: _editWeight,
+      child: Container(
+        padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 6),
+        decoration: BoxDecoration(
+          color: AppColor.primary.withOpacity(0.08),
+          borderRadius: BorderRadius.circular(8.0),
+          border: Border.all(color: AppColor.primary.withOpacity(0.4)),
+        ),
+        child: Row(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            Text(
+              widget.data.quantityLabel,
+              style: const TextStyle(
+                fontWeight: FontWeight.bold,
+                color: AppColor.primary,
+              ),
+            ),
+            const SpaceWidth(4),
+            const Icon(Icons.edit_outlined, size: 14, color: AppColor.primary),
+          ],
+        ),
+      ),
+    );
+  }
+
+  Widget _buildQuantityStepper() {
+    return Row(
+      children: [
+        GestureDetector(
+          onTap: () {
+            context.read<CheckoutFormBloc>().add(
+              CheckoutFormEvent.removeItem(
+                widget.data.product,
+                widget.data.variant,
+              ),
+            );
+          },
+          child: Container(
+            width: 30,
+            height: 30,
+            color: AppColor.white,
+            child: const Icon(Icons.remove_circle, color: AppColor.primary),
+          ),
+        ),
+        SizedBox(
+          width: 30.0,
+          child: Center(child: Text(widget.data.quantity.toString())),
+        ),
+        GestureDetector(
+          onTap: () {
+            context.read<CheckoutFormBloc>().add(
+              CheckoutFormEvent.addItem(
+                widget.data.product,
+                widget.data.variant,
+              ),
+            );
+          },
+          child: Container(
+            width: 30,
+            height: 30,
+            color: AppColor.white,
+            child: const Icon(Icons.add_circle, color: AppColor.primary),
+          ),
+        ),
+      ],
+    );
+  }
 }

lib/presentation/components/card/product_card.dart

@@ -17,18 +17,35 @@ class ProductCard extends StatelessWidget {
   Widget build(BuildContext context) {
     return GestureDetector(
       onTap: () {
-        if (product.isActive == true) {
+        if (product.isActive != true) return;
-          if (product.variants.isEmpty) {
+
-            context.read<CheckoutFormBloc>().add(
+        if (product.variants.isNotEmpty) {
-              CheckoutFormEvent.addItem(product, null),
+          showDialog(
-            );
+            context: context,
-          } else {
+            builder: (context) => VariantDialog(product: product),
-            showDialog(
+          );
-              context: context,
+          return;
-              builder: (context) => VariantDialog(product: product),
-            );
-          }
         }
+
+        // Produk timbangan tidak bisa langsung masuk keranjang — kasir harus
+        // menimbang dulu, dan tiap penimbangan jadi barisnya sendiri.
+        if (product.isSoldByWeight) {
+          final bloc = context.read<CheckoutFormBloc>();
+          showDialog(
+            context: context,
+            builder: (context) => WeightInputDialog(
+              product: product,
+              onSubmit: (weight) => bloc.add(
+                CheckoutFormEvent.addWeightedItem(product, null, weight),
+              ),
+            ),
+          );
+          return;
+        }
+
+        context.read<CheckoutFormBloc>().add(
+          CheckoutFormEvent.addItem(product, null),
+        );
       },
       child: Container(
         decoration: BoxDecoration(
@@ -75,7 +92,11 @@ class ProductCard extends StatelessWidget {
                   Align(
                     alignment: Alignment.center,
                     child: Text(
-                      product.price.currencyFormatRp,
+                      product.isSoldByWeight
+                          ? '${product.price.currencyFormatRp} ${product.priceUnitLabel}'
+                              .trim()
+                          : product.price.currencyFormatRp,
+                      textAlign: TextAlign.center,
                       style: const TextStyle(
                         fontWeight: FontWeight.bold,
                         fontSize: 12,
@@ -89,31 +110,39 @@ class ProductCard extends StatelessWidget {
 
             BlocBuilder<CheckoutFormBloc, CheckoutFormState>(
               builder: (context, state) {
-                final totalQuantity = state.items
+                final lines = state.items
                     .where((item) => item.product.id == product.id)
-                    .map((item) => item.quantity)
+                    .toList();
-                    .fold(0, (sum, qty) => sum + qty);
+
+                if (lines.isEmpty) return const SizedBox.shrink();
+
+                // Untuk produk timbangan, jumlah baris tidak berarti apa-apa
+                // (selalu 1 per penimbangan) — yang informatif adalah total
+                // berat yang sudah masuk keranjang.
+                final label = product.isSoldByWeight
+                    ? '${lines.fold<double>(0, (sum, item) => sum + (item.weight ?? 0)).weightFormat} ${product.unitLabel}'
+                          .trim()
+                    : lines
+                          .fold<int>(0, (sum, item) => sum + item.quantity)
+                          .toString();
 
-                if (totalQuantity == 0) {
-                  return const SizedBox.shrink();
-                }
                 return Positioned(
                   top: 4,
                   right: 4,
                   child: Container(
-                    width: 40,
+                    constraints: const BoxConstraints(minWidth: 40),
                     height: 40,
-                    padding: const EdgeInsets.all(6),
+                    padding: const EdgeInsets.symmetric(horizontal: 6),
                     decoration: const BoxDecoration(
                       borderRadius: BorderRadius.all(Radius.circular(9.0)),
                       color: AppColor.primary,
                     ),
                     child: Center(
                       child: Text(
-                        totalQuantity.toString(),
+                        label,
-                        style: const TextStyle(
+                        style: TextStyle(
                           color: Colors.white,
-                          fontSize: 20,
+                          fontSize: product.isSoldByWeight ? 13 : 20,
                           fontWeight: FontWeight.bold,
                         ),
                       ),

lib/presentation/components/dialog/dialog.dart

@@ -1,3 +1,5 @@
+import 'dart:async';
+
 import 'package:auto_route/auto_route.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
@@ -6,11 +8,13 @@ import '../../../application/checkout/checkout_form/checkout_form_bloc.dart';
 import '../../../application/outlet/outlet_loader/outlet_loader_bloc.dart';
 import '../../../application/printer/bluetooth/bluetooth_connect/bluetooth_connect_bloc.dart';
 import '../../../application/printer/bluetooth/bluetooth_loader/bluetooth_loader_bloc.dart';
+import '../../../application/printer/print_struck/print_struck_bloc.dart';
 import '../../../common/extension/extension.dart';
 import '../../../common/function/app_function.dart';
 import '../../../common/theme/theme.dart';
 import '../../../common/types/order_type.dart';
 import '../../../domain/delivery/delivery.dart';
+import '../../../domain/printer/printer.dart';
 import '../../../domain/product/product.dart';
 import '../button/button.dart';
 import '../card/outlet_card.dart';
@@ -20,6 +24,8 @@ import '../spaces/space.dart';
 part 'custom_modal_dialog.dart';
 part 'outlet_dialog.dart';
 part 'variant_dialog.dart';
+part 'weight_input_dialog.dart';
 part 'delivery_dialog.dart';
 part 'order_type_dialog.dart';
 part 'printer_bluetooth_dialog.dart';
+part 'print_progress_dialog.dart';

lib/presentation/components/dialog/order/order_save_confirm_dialog.dart

@@ -163,7 +163,9 @@ class OrderSaveConfirmDialog extends StatelessWidget {
                                               overflow: TextOverflow.ellipsis,
                                             ),
                                             Text(
-                                              '${item.quantity} qty',
+                                              item.isWeighted
+                                                  ? item.quantityLabel
+                                                  : '${item.quantity} qty',
                                               style: AppStyle.sm.copyWith(
                                                 color: AppColor.textSecondary,
                                               ),
@@ -185,8 +187,7 @@ class OrderSaveConfirmDialog extends StatelessWidget {
                                           ),
                                         ),
                                         child: Text(
-                                          ((item.product.price) * item.quantity)
+                                          item.lineTotal.currencyFormatRpV2,
-                                              .currencyFormatRpV2,
                                           style: AppStyle.md.copyWith(
                                             fontWeight: FontWeight.bold,
                                             color: AppColor.primary,

lib/presentation/components/dialog/order/order_void_confirm_dialog.dart

@@ -28,18 +28,20 @@ class OrderVoidConfirmDialog extends StatelessWidget {
               children: [
                 Expanded(
                   child: AppElevatedButton.outlined(
-                    onPressed: () => context.maybePop(),
+                    onPressed: state.isSubmitting ? null : () => context.maybePop(),
                     label: 'Batal',
                   ),
                 ),
                 const SpaceWidth(16),
                 Expanded(
                   child: AppElevatedButton.filled(
-                    onPressed: () {
+                    onPressed: state.isSubmitting
-                      context.read<VoidFormBloc>().add(
+                        ? null
-                        const VoidFormEvent.submitted(),
+                        : () {
-                      );
+                            context.read<VoidFormBloc>().add(
-                    },
+                              const VoidFormEvent.submitted(),
+                            );
+                          },
                     label: state.voidType.isAll ? 'Void Pesanan' : 'Void Item',
                     isLoading: state.isSubmitting,
                   ),

lib/presentation/components/dialog/print_progress_dialog.dart

@@ -0,0 +1,273 @@
+part of 'dialog.dart';
+
+/// Dijaga supaya satu job cetak hanya membuka satu dialog, walau listener
+/// terpicu lebih dari sekali.
+bool _isPrintProgressDialogOpen = false;
+
+Future<void> showPrintProgressDialog(BuildContext context) async {
+  if (_isPrintProgressDialogOpen) return;
+  _isPrintProgressDialogOpen = true;
+
+  try {
+    await showDialog<void>(
+      context: context,
+      // Cetak jalan di latar belakang, kasir tidak perlu menunggui dialognya.
+      barrierDismissible: true,
+      builder: (_) => const PrintProgressDialog(),
+    );
+  } finally {
+    _isPrintProgressDialogOpen = false;
+  }
+}
+
+class PrintProgressDialog extends StatefulWidget {
+  const PrintProgressDialog({super.key});
+
+  @override
+  State<PrintProgressDialog> createState() => _PrintProgressDialogState();
+}
+
+class _PrintProgressDialogState extends State<PrintProgressDialog> {
+  Timer? _autoClose;
+
+  @override
+  void dispose() {
+    _autoClose?.cancel();
+    super.dispose();
+  }
+
+  /// Semua station keluar — tutup sendiri supaya antrean kasir tidak tertahan,
+  /// tapi beri jeda sebentar agar centang hijaunya sempat terbaca.
+  void _scheduleAutoClose() {
+    _autoClose?.cancel();
+    _autoClose = Timer(const Duration(milliseconds: 1500), () {
+      if (mounted) Navigator.of(context).pop();
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return BlocConsumer<PrintStruckBloc, PrintStruckState>(
+      listenWhen: (previous, current) =>
+          previous.isPrinting && !current.isPrinting,
+      listener: (context, state) {
+        if (state.hasFailure) return;
+        _scheduleAutoClose();
+      },
+      builder: (context, state) {
+        final isDone = !state.isPrinting;
+
+        return CustomModalDialog(
+          title: isDone ? 'Hasil Cetak' : 'Mencetak Struk',
+          maxWidth: 480,
+          minHeight: 0,
+          contentPadding: const EdgeInsets.all(20),
+          bottom: _buildFooter(context, state),
+          child: Column(
+            crossAxisAlignment: CrossAxisAlignment.stretch,
+            children: [
+              _buildSummary(state),
+              const SpaceHeight(16),
+              for (final result in state.stations) ...[
+                _StationRow(result: result),
+                const SpaceHeight(8),
+              ],
+            ],
+          ),
+        );
+      },
+    );
+  }
+
+  Widget _buildSummary(PrintStruckState state) {
+    final isDone = !state.isPrinting;
+    final total = state.plannedCount;
+    final success = state.successCount;
+
+    final Color color;
+    final String message;
+
+    if (!isDone) {
+      color = AppColor.primary;
+      message = 'Mengirim ke printer…';
+    } else if (state.hasFailure) {
+      color = AppColor.error;
+      message = '${state.failedStations.length} station gagal dicetak';
+    } else {
+      color = AppColor.success;
+      message = 'Semua struk berhasil dicetak';
+    }
+
+    return Container(
+      padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
+      decoration: BoxDecoration(
+        color: color.withOpacity(0.08),
+        borderRadius: BorderRadius.circular(12),
+        border: Border.all(color: color.withOpacity(0.25)),
+      ),
+      child: Row(
+        children: [
+          Expanded(
+            child: Text(
+              message,
+              style: AppStyle.md.copyWith(
+                color: color,
+                fontWeight: FontWeight.w600,
+              ),
+            ),
+          ),
+          Text(
+            '$success dari $total',
+            style: AppStyle.md.copyWith(
+              color: color,
+              fontWeight: FontWeight.bold,
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+
+  Widget _buildFooter(BuildContext context, PrintStruckState state) {
+    final isDone = !state.isPrinting;
+
+    return Container(
+      padding: const EdgeInsets.fromLTRB(20, 0, 20, 20),
+      child: Column(
+        crossAxisAlignment: CrossAxisAlignment.stretch,
+        children: [
+          if (!isDone) ...[
+            Text(
+              'Cetak berjalan di latar belakang. Dialog ini boleh ditutup.',
+              style: AppStyle.sm.copyWith(color: AppColor.textSecondary),
+              textAlign: TextAlign.center,
+            ),
+            const SpaceHeight(12),
+          ],
+          Row(
+            children: [
+              Expanded(
+                child: AppElevatedButton.outlined(
+                  onPressed: () => Navigator.of(context).pop(),
+                  label: 'Tutup',
+                ),
+              ),
+              if (isDone && state.hasFailure) ...[
+                const SpaceWidth(12),
+                Expanded(
+                  flex: 2,
+                  child: AppElevatedButton.filled(
+                    onPressed: () => context.read<PrintStruckBloc>().add(
+                      const PrintStruckEvent.retryFailed(),
+                    ),
+                    label: 'Cetak Ulang yang Gagal',
+                    icon: const Icon(
+                      Icons.refresh_rounded,
+                      color: AppColor.white,
+                      size: 18,
+                    ),
+                  ),
+                ),
+              ],
+            ],
+          ),
+        ],
+      ),
+    );
+  }
+}
+
+class _StationRow extends StatelessWidget {
+  final PrintStationResult result;
+
+  const _StationRow({required this.result});
+
+  @override
+  Widget build(BuildContext context) {
+    final color = _color;
+
+    return Container(
+      padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 12),
+      decoration: BoxDecoration(
+        borderRadius: BorderRadius.circular(12),
+        border: Border.all(
+          color: result.isFailed ? color.withOpacity(0.4) : AppColor.border,
+        ),
+        color: result.isFailed ? color.withOpacity(0.05) : Colors.transparent,
+      ),
+      child: Row(
+        children: [
+          SizedBox(width: 20, height: 20, child: Center(child: _icon)),
+          const SpaceWidth(12),
+          Expanded(
+            child: Column(
+              crossAxisAlignment: CrossAxisAlignment.start,
+              children: [
+                Text(
+                  result.station.label,
+                  style: AppStyle.md.copyWith(fontWeight: FontWeight.w600),
+                ),
+                const SpaceHeight(2),
+                Text(
+                  _statusText,
+                  style: AppStyle.sm.copyWith(color: color),
+                ),
+              ],
+            ),
+          ),
+          if (result.elapsed > Duration.zero) ...[
+            const SpaceWidth(8),
+            Text(
+              '${(result.elapsed.inMilliseconds / 1000).toStringAsFixed(1)}s',
+              style: AppStyle.sm.copyWith(color: AppColor.textSecondary),
+            ),
+          ],
+        ],
+      ),
+    );
+  }
+
+  Widget get _icon => switch (result.status) {
+    PrintStationStatus.printing => const SizedBox(
+      width: 16,
+      height: 16,
+      child: CircularProgressIndicator(strokeWidth: 2),
+    ),
+    PrintStationStatus.pending => const Icon(
+      Icons.schedule_rounded,
+      size: 18,
+      color: AppColor.textSecondary,
+    ),
+    PrintStationStatus.success => const Icon(
+      Icons.check_circle_rounded,
+      size: 20,
+      color: AppColor.success,
+    ),
+    PrintStationStatus.failed => const Icon(
+      Icons.error_rounded,
+      size: 20,
+      color: AppColor.error,
+    ),
+    PrintStationStatus.skipped => const Icon(
+      Icons.remove_circle_outline_rounded,
+      size: 18,
+      color: AppColor.textSecondary,
+    ),
+  };
+
+  Color get _color => switch (result.status) {
+    PrintStationStatus.printing => AppColor.primary,
+    PrintStationStatus.success => AppColor.success,
+    PrintStationStatus.failed => AppColor.error,
+    PrintStationStatus.pending ||
+    PrintStationStatus.skipped => AppColor.textSecondary,
+  };
+
+  String get _statusText => switch (result.status) {
+    PrintStationStatus.pending => 'Menunggu giliran',
+    PrintStationStatus.printing => 'Mengirim ke printer…',
+    PrintStationStatus.success => 'Berhasil dicetak',
+    PrintStationStatus.failed => result.message ?? 'Gagal dicetak',
+    PrintStationStatus.skipped => result.message ?? 'Dilewati',
+  };
+}

lib/presentation/components/dialog/variant_dialog.dart

@@ -21,10 +21,33 @@ class VariantDialog extends StatelessWidget {
           return GestureDetector(
             onTap: () {
               // Aksi saat varian dipilih
-              context.maybePop();
+              final bloc = context.read<CheckoutFormBloc>();
-              context.read<CheckoutFormBloc>().add(
+              // Context dialog ini mati begitu di-pop, jadi dialog lanjutan
-                CheckoutFormEvent.addItem(product, variant),
+              // dibuka lewat context milik Navigator.
-              );
+              final navigator = Navigator.of(context, rootNavigator: true);
+              navigator.pop();
+
+              // Produk timbangan lanjut ke papan angka; varian hanya mengubah
+              // harga per satuannya.
+              if (product.isSoldByWeight) {
+                showDialog(
+                  context: navigator.context,
+                  builder: (context) => WeightInputDialog(
+                    product: product,
+                    variant: variant,
+                    onSubmit: (weight) => bloc.add(
+                      CheckoutFormEvent.addWeightedItem(
+                        product,
+                        variant,
+                        weight,
+                      ),
+                    ),
+                  ),
+                );
+                return;
+              }
+
+              bloc.add(CheckoutFormEvent.addItem(product, variant));
             },
             child: Container(
               width: (context.deviceWidth * 0.4 - 12 - 32) / 2 - 6, // 2 per row

lib/presentation/components/dialog/weight_input_dialog.dart

@@ -0,0 +1,267 @@
+part of 'dialog.dart';
+
+/// Papan angka desimal untuk produk yang dijual per timbangan.
+///
+/// Satu kali dialog ini ditutup dengan angka = satu penimbangan = satu baris
+/// keranjang. Untuk mengoreksi salah timbang, buka lagi baris yang sama lewat
+/// [initialWeight] alih-alih menambah baris baru.
+class WeightInputDialog extends StatefulWidget {
+  final Product product;
+  final ProductVariant? variant;
+  final double? initialWeight;
+  final ValueChanged<double> onSubmit;
+
+  const WeightInputDialog({
+    super.key,
+    required this.product,
+    required this.onSubmit,
+    this.variant,
+    this.initialWeight,
+  });
+
+  /// Berat terkecil yang diterima backend; di bawah ini membulat ke nol.
+  static const double minWeight = 0.001;
+
+  /// Backend membulatkan berat ke 3 desimal.
+  static const int maxDecimals = 3;
+
+  @override
+  State<WeightInputDialog> createState() => _WeightInputDialogState();
+}
+
+class _WeightInputDialogState extends State<WeightInputDialog> {
+  /// Angka disimpan sebagai teks supaya "4," dan "4,20" bisa diketik utuh
+  /// tanpa dinormalisasi di tengah pengetikan.
+  late String _input = _formatInitial(widget.initialWeight);
+
+  static String _formatInitial(double? weight) {
+    if (weight == null || weight <= 0) return '';
+    return weight
+        .toStringAsFixed(WeightInputDialog.maxDecimals)
+        .replaceFirst(RegExp(r'\.?0+$'), '')
+        .replaceAll('.', ',');
+  }
+
+  double get _weight => double.tryParse(_input.replaceAll(',', '.')) ?? 0;
+
+  bool get _isValid => _weight >= WeightInputDialog.minWeight;
+
+  double get _unitPrice =>
+      widget.product.price + (widget.variant?.priceModifier ?? 0);
+
+  String get _unitLabel => widget.product.unitLabel;
+
+  void _tapDigit(String digit) {
+    final separatorIndex = _input.indexOf(',');
+    if (separatorIndex != -1 &&
+        _input.length - separatorIndex - 1 >= WeightInputDialog.maxDecimals) {
+      return;
+    }
+
+    setState(() {
+      // Hindari "007": nol di depan hanya berarti sesuatu sebelum koma.
+      _input = _input == '0' ? digit : '$_input$digit';
+    });
+  }
+
+  void _tapSeparator() {
+    if (_input.contains(',')) return;
+    setState(() => _input = _input.isEmpty ? '0,' : '$_input,');
+  }
+
+  void _tapBackspace() {
+    if (_input.isEmpty) return;
+    setState(() => _input = _input.substring(0, _input.length - 1));
+  }
+
+  void _tapClear() => setState(() => _input = '');
+
+  void _submit() {
+    if (!_isValid) return;
+    final rounded = double.parse(
+      _weight.toStringAsFixed(WeightInputDialog.maxDecimals),
+    );
+    context.maybePop();
+    widget.onSubmit(rounded);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return CustomModalDialog(
+      title: widget.product.name,
+      subtitle: _unitLabel.isEmpty
+          ? 'Masukkan berat'
+          : 'Masukkan berat dalam $_unitLabel',
+      minWidth: 380,
+      maxWidth: 420,
+      minHeight: 0,
+      contentPadding: const EdgeInsets.all(16),
+      child: Column(
+        crossAxisAlignment: CrossAxisAlignment.stretch,
+        children: [
+          _buildDisplay(),
+          const SpaceHeight(16),
+          _buildKeypad(),
+          const SpaceHeight(16),
+          AppElevatedButton.filled(
+            borderRadius: 12,
+            disabled: !_isValid,
+            onPressed: _submit,
+            label: widget.initialWeight == null
+                ? 'Tambah ke Pesanan'
+                : 'Simpan Berat',
+          ),
+          if (_input.isNotEmpty && !_isValid) ...[
+            const SpaceHeight(8),
+            Text(
+              'Berat minimal 0,001${_unitLabel.isEmpty ? '' : ' $_unitLabel'}',
+              textAlign: TextAlign.center,
+              style: AppStyle.sm.copyWith(color: AppColor.error),
+            ),
+          ],
+        ],
+      ),
+    );
+  }
+
+  Widget _buildDisplay() {
+    return Container(
+      padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
+      decoration: BoxDecoration(
+        color: AppColor.primary.withOpacity(0.06),
+        borderRadius: BorderRadius.circular(12),
+        border: Border.all(color: AppColor.primary.withOpacity(0.3)),
+      ),
+      child: Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          Row(
+            crossAxisAlignment: CrossAxisAlignment.baseline,
+            textBaseline: TextBaseline.alphabetic,
+            children: [
+              Expanded(
+                child: Text(
+                  _input.isEmpty ? '0' : _input,
+                  textAlign: TextAlign.right,
+                  style: AppStyle.xxl.copyWith(
+                    fontSize: 40,
+                    fontWeight: FontWeight.bold,
+                    color: _input.isEmpty
+                        ? AppColor.textSecondary
+                        : AppColor.black,
+                  ),
+                ),
+              ),
+              if (_unitLabel.isNotEmpty) ...[
+                const SpaceWidth(8),
+                Text(
+                  _unitLabel,
+                  style: AppStyle.lg.copyWith(color: AppColor.textSecondary),
+                ),
+              ],
+            ],
+          ),
+          const SpaceHeight(4),
+          Row(
+            mainAxisAlignment: MainAxisAlignment.spaceBetween,
+            children: [
+              Text(
+                '${_unitPrice.currencyFormatRpV2}'
+                '${_unitLabel.isEmpty ? '' : ' / $_unitLabel'}',
+                style: AppStyle.sm.copyWith(color: AppColor.textSecondary),
+              ),
+              Text(
+                (_unitPrice * _weight).currencyFormatRpV2,
+                style: AppStyle.lg.copyWith(
+                  fontWeight: FontWeight.bold,
+                  color: AppColor.primary,
+                ),
+              ),
+            ],
+          ),
+        ],
+      ),
+    );
+  }
+
+  Widget _buildKeypad() {
+    const keys = [
+      ['1', '2', '3'],
+      ['4', '5', '6'],
+      ['7', '8', '9'],
+      [',', '0', 'hapus'],
+    ];
+
+    return Column(
+      children: [
+        for (final row in keys)
+          Padding(
+            padding: const EdgeInsets.only(bottom: 8),
+            child: Row(
+              children: [
+                for (final key in row)
+                  Expanded(
+                    child: Padding(
+                      padding: const EdgeInsets.symmetric(horizontal: 4),
+                      child: _KeypadButton(
+                        label: key,
+                        onTap: () {
+                          switch (key) {
+                            case ',':
+                              _tapSeparator();
+                            case 'hapus':
+                              _tapBackspace();
+                            default:
+                              _tapDigit(key);
+                          }
+                        },
+                        // Tahan lama untuk mengosongkan angka sekaligus.
+                        onLongPress: key == 'hapus' ? _tapClear : null,
+                      ),
+                    ),
+                  ),
+              ],
+            ),
+          ),
+      ],
+    );
+  }
+}
+
+class _KeypadButton extends StatelessWidget {
+  final String label;
+  final VoidCallback onTap;
+  final VoidCallback? onLongPress;
+
+  const _KeypadButton({
+    required this.label,
+    required this.onTap,
+    this.onLongPress,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final isBackspace = label == 'hapus';
+
+    return InkWell(
+      onTap: onTap,
+      onLongPress: onLongPress,
+      borderRadius: BorderRadius.circular(12),
+      child: Container(
+        height: 56,
+        alignment: Alignment.center,
+        decoration: BoxDecoration(
+          color: AppColor.white,
+          borderRadius: BorderRadius.circular(12),
+          border: Border.all(color: AppColor.border),
+        ),
+        child: isBackspace
+            ? const Icon(Icons.backspace_outlined, color: AppColor.primary)
+            : Text(
+                label,
+                style: AppStyle.xxl.copyWith(fontWeight: FontWeight.w600),
+              ),
+      ),
+    );
+  }
+}

lib/presentation/components/print/print_ui.dart

@@ -6,6 +6,27 @@ import '../../../domain/outlet/outlet.dart';
 import 'receipt_component_builder.dart';
 
 class PrintUi {
+  /// `CapabilityProfile.load()` membaca dan mem-parse aset tiap kali dipanggil,
+  /// dan sekali cetak semua station memanggilnya sampai lima kali. Hasilnya
+  /// sama untuk seluruh aplikasi, jadi cukup dimuat satu kali.
+  static Future<CapabilityProfile>? _cachedProfile;
+
+  static Future<CapabilityProfile> _capabilityProfile() async {
+    final cached = _cachedProfile;
+    if (cached != null) return cached;
+
+    final future = CapabilityProfile.load();
+    _cachedProfile = future;
+
+    try {
+      return await future;
+    } catch (_) {
+      // Jangan kunci kegagalan sesaat — biarkan cetakan berikutnya mencoba lagi.
+      _cachedProfile = null;
+      rethrow;
+    }
+  }
+
   Future<List<int>> printOrder({
     required Order order,
     required Outlet outlet,
@@ -14,7 +35,7 @@ class PrintUi {
   }) async {
     List<int> bytes = [];
 
-    final profile = await CapabilityProfile.load();
+    final profile = await _capabilityProfile();
     final generator = Generator(
       paper == 58 ? PaperSize.mm58 : PaperSize.mm80,
       profile,
@@ -30,6 +51,9 @@ class PrintUi {
       outletName: outlet.name,
       address: outlet.address,
       phoneNumber: outlet.phoneNumber,
+      fontType: PosFontType.fontA,
+      width: PosTextSize.size1,
+      height: PosTextSize.size1,
     );
 
     bytes += builder.orderInfo(
@@ -38,9 +62,14 @@ class PrintUi {
       cashierName: cashierName,
       paymentMethod: order.payments.last.paymentMethodName,
       tableNumber: order.tableNumber,
+      fontType: PosFontType.fontA,
+      width: PosTextSize.size1,
+      height: PosTextSize.size1,
     );
 
-    bytes += builder.orderType(order.orderType);
+    bytes += builder.orderType(order.orderType,   fontType: PosFontType.fontA,
+      width: PosTextSize.size1,
+      height: PosTextSize.size1,);
 
     bytes += builder.emptyLines(1);
 
@@ -48,10 +77,14 @@ class PrintUi {
       bytes += builder.orderItem(
         productName: item.productName,
         quantity: item.quantity,
+        quantityLabel: item.isWeighted ? item.quantityLabel : null,
         unitPrice: item.unitPrice.currencyFormatRpV2,
         totalPrice: item.totalPrice.currencyFormatRpV2,
         variantName: item.productVariantName,
         notes: item.notes,
+         fontType: PosFontType.fontA,
+      width: PosTextSize.size1,
+      height: PosTextSize.size1,
       );
     }
 
@@ -61,6 +94,9 @@ class PrintUi {
       discount: order.discountAmount.currencyFormatRpV2,
       total: order.totalAmount.currencyFormatRpV2,
       paid: order.totalPaid.currencyFormatRpV2,
+      fontType: PosFontType.fontA,
+      width: PosTextSize.size1,
+      height: PosTextSize.size1,
     );
 
     bytes += builder.footer();
@@ -76,7 +112,7 @@ class PrintUi {
   }) async {
     List<int> bytes = [];
 
-    final profile = await CapabilityProfile.load();
+    final profile = await _capabilityProfile();
     final generator = Generator(
       paper == 58 ? PaperSize.mm58 : PaperSize.mm80,
       profile,
@@ -90,26 +126,22 @@ class PrintUi {
 
     // Header
     bytes += builder.textCenter('Table Checker', bold: true);
-    bytes += builder.separator();
+    bytes += builder.tableName(order.tableNumber.isNotEmpty ? order.tableNumber : '-', height: PosTextSize.size3, width: PosTextSize.size3);
-    bytes += builder.textCenter(
-      'Table : ${order.tableNumber.isNotEmpty ? order.tableNumber : '-'}',
-      bold: true,
-    );
-    bytes += builder.separator();
 
     // Order info — label : value, left aligned
     bytes += builder.orderInfoSimple(
       orderNumber: order.orderNumber,
       orderType: order.orderType,
       cashierName: cashierName,
+      customerName: order.metadata['customer_name'] ?? '-',
     );
 
     bytes += builder.separator();
 
     // Items — qty NAMA (uppercase), variant indent
-    for (final item in order.orderItems) {
+    for (final item in order.orderItems.where((e) => e.printToChecker)) {
       final name = item.productName.toUpperCase();
-      bytes += builder.itemText('${item.quantity} $name');
+      bytes += builder.itemText('${item.quantityLabel} $name');
       if (item.productVariantName.isNotEmpty) {
         bytes += builder.itemText('  ${item.productVariantName.toUpperCase()}', bold: false);
       }
@@ -132,7 +164,7 @@ class PrintUi {
   }) async {
     List<int> bytes = [];
 
-    final profile = await CapabilityProfile.load();
+    final profile = await _capabilityProfile();
     final generator = Generator(
       paper == 58 ? PaperSize.mm58 : PaperSize.mm80,
       profile,
@@ -146,7 +178,7 @@ class PrintUi {
       bytes += generator.reset();
 
       // Header
-      bytes += builder.row2Columns('Kitchen', order.orderType, bold: true);
+      bytes += builder.row2Columns('Kitchen', order.orderType.toUpperCase(), bold: true);
       bytes += builder.separator();
       bytes += builder.textCenter(
         'Table : ${order.tableNumber.isNotEmpty ? order.tableNumber : '-'}',
@@ -158,13 +190,14 @@ class PrintUi {
       bytes += builder.orderInfoSimple(
         orderNumber: order.orderNumber,
         cashierName: cashierName,
+        customerName: order.metadata['customer_name'] ?? '-',
       );
 
       bytes += builder.separator();
 
       // Single item
       final name = item.productName.toUpperCase();
-      bytes += builder.itemText('${item.quantity} $name');
+      bytes += builder.itemText('${item.quantityLabel} $name');
       if (item.productVariantName.isNotEmpty) {
         bytes += builder.itemText('  ${item.productVariantName.toUpperCase()}', bold: false);
       }
@@ -187,7 +220,7 @@ class PrintUi {
   }) async {
     List<int> bytes = [];
 
-    final profile = await CapabilityProfile.load();
+    final profile = await _capabilityProfile();
     final generator = Generator(
       paper == 58 ? PaperSize.mm58 : PaperSize.mm80,
       profile,
@@ -201,7 +234,7 @@ class PrintUi {
       bytes += generator.reset();
 
       // Header
-      bytes += builder.textCenter('Bar', bold: true);
+      bytes += builder.row2Columns('Bar', order.orderType.toUpperCase(), bold: true);
       bytes += builder.separator();
       bytes += builder.textCenter(
         'Table : ${order.tableNumber.isNotEmpty ? order.tableNumber : '-'}',
@@ -212,7 +245,7 @@ class PrintUi {
       // Order info
       bytes += builder.orderInfoSimple(
         orderNumber: order.orderNumber,
-        orderType: order.orderType,
+        customerName: order.metadata['customer_name'] ?? '-',
         cashierName: cashierName,
       );
 
@@ -220,7 +253,7 @@ class PrintUi {
 
       // Single item
       final name = item.productName.toUpperCase();
-      bytes += builder.itemText('${item.quantity} $name');
+      bytes += builder.itemText('${item.quantityLabel} $name');
       if (item.productVariantName.isNotEmpty) {
         bytes += builder.itemText('  ${item.productVariantName.toUpperCase()}', bold: false);
       }
@@ -242,7 +275,7 @@ class PrintUi {
   }) async {
     List<int> bytes = [];
 
-    final profile = await CapabilityProfile.load();
+    final profile = await _capabilityProfile();
     final generator = Generator(
       paper == 58 ? PaperSize.mm58 : PaperSize.mm80,
       profile,
@@ -283,7 +316,7 @@ class PrintUi {
   }) async {
     List<int> bytes = [];
 
-    final profile = await CapabilityProfile.load();
+    final profile = await _capabilityProfile();
     final generator = Generator(
       paper == 58 ? PaperSize.mm58 : PaperSize.mm80,
       profile,
@@ -299,6 +332,9 @@ class PrintUi {
       outletName: outlet.name,
       address: outlet.address,
       phoneNumber: outlet.phoneNumber,
+        fontType: PosFontType.fontA,
+      width: PosTextSize.size1,
+      height: PosTextSize.size1,
     );
 
     bytes += builder.orderInfo(
@@ -309,9 +345,14 @@ class PrintUi {
           ? null
           : order.payments.last.paymentMethodName,
       tableNumber: order.tableNumber,
+        fontType: PosFontType.fontA,
+      width: PosTextSize.size1,
+      height: PosTextSize.size1,
     );
 
-    bytes += builder.orderType(order.orderType);
+    bytes += builder.orderType(order.orderType,   fontType: PosFontType.fontA,
+      width: PosTextSize.size1,
+      height: PosTextSize.size1,);
 
     bytes += builder.emptyLines(1);
 
@@ -319,10 +360,14 @@ class PrintUi {
       bytes += builder.orderItem(
         productName: item.productName,
         quantity: item.quantity,
+        quantityLabel: item.isWeighted ? item.quantityLabel : null,
         unitPrice: item.unitPrice.currencyFormatRpV2,
         totalPrice: item.totalPrice.currencyFormatRpV2,
         variantName: item.productVariantName,
         notes: item.notes,
+          fontType: PosFontType.fontA,
+      width: PosTextSize.size1,
+      height: PosTextSize.size1,
       );
     }
 
@@ -332,6 +377,9 @@ class PrintUi {
       discount: order.discountAmount.currencyFormatRpV2,
       total: order.totalAmount.currencyFormatRpV2,
       paid: order.totalPaid.currencyFormatRpV2,
+      fontType: PosFontType.fontA,
+      width: PosTextSize.size1,
+      height: PosTextSize.size1,
     );
 
     bytes += builder.footer(message: 'Kasir');
@@ -347,7 +395,7 @@ class PrintUi {
   }) async {
     List<int> bytes = [];
 
-    final profile = await CapabilityProfile.load();
+    final profile = await _capabilityProfile();
     final generator = Generator(
       paper == 58 ? PaperSize.mm58 : PaperSize.mm80,
       profile,
@@ -363,6 +411,9 @@ class PrintUi {
       outletName: outlet.name,
       address: outlet.address,
       phoneNumber: outlet.phoneNumber,
+      fontType: PosFontType.fontA,
+      width: PosTextSize.size1,
+      height: PosTextSize.size1,
     );
 
     bytes += builder.dateTime(DateTime.now());
@@ -375,9 +426,14 @@ class PrintUi {
           ? null
           : order.payments.last.paymentMethodName,
       tableNumber: order.tableNumber,
+        fontType: PosFontType.fontA,
+      width: PosTextSize.size1,
+      height: PosTextSize.size1,
     );
 
-    bytes += builder.orderType('Void');
+    bytes += builder.orderType('Void',   fontType: PosFontType.fontA,
+      width: PosTextSize.size1,
+      height: PosTextSize.size1,);
 
     bytes += builder.emptyLines(1);
 
@@ -385,10 +441,14 @@ class PrintUi {
       bytes += builder.orderItem(
         productName: item.productName,
         quantity: item.quantity,
+        quantityLabel: item.isWeighted ? item.quantityLabel : null,
         unitPrice: item.unitPrice.currencyFormatRpV2,
         totalPrice: item.totalPrice.currencyFormatRpV2,
         variantName: item.productVariantName,
         notes: item.notes,
+          fontType: PosFontType.fontA,
+      width: PosTextSize.size1,
+      height: PosTextSize.size1,
       );
     }
     bytes += builder.summary(
@@ -397,6 +457,9 @@ class PrintUi {
       discount: order.discountAmount.currencyFormatRpV2,
       total: order.totalAmount.currencyFormatRpV2,
       paid: order.totalPaid.currencyFormatRpV2,
+      fontType: PosFontType.fontA,
+      width: PosTextSize.size1,
+      height: PosTextSize.size1,
     );
 
     bytes += builder.footer(message: 'Kasir');
@@ -412,7 +475,7 @@ class PrintUi {
   }) async {
     List<int> bytes = [];
 
-    final profile = await CapabilityProfile.load();
+    final profile = await _capabilityProfile();
     final generator = Generator(
       paper == 58 ? PaperSize.mm58 : PaperSize.mm80,
       profile,
@@ -428,9 +491,14 @@ class PrintUi {
       outletName: outlet.name,
       address: outlet.address,
       phoneNumber: outlet.phoneNumber,
+        fontType: PosFontType.fontA,
+      width: PosTextSize.size1,
+      height: PosTextSize.size1,
     );
 
-    bytes += builder.dateTime(DateTime.now());
+    bytes += builder.dateTime(DateTime.now(),   fontType: PosFontType.fontA,
+      width: PosTextSize.size1,
+      height: PosTextSize.size1,);
 
     bytes += builder.orderInfo(
       orderNumber: order.orderNumber,
@@ -440,13 +508,21 @@ class PrintUi {
           ? null
           : order.payments.last.paymentMethodName,
       tableNumber: order.tableNumber,
+        fontType: PosFontType.fontA,
+      width: PosTextSize.size1,
+      height: PosTextSize.size1,
     );
 
-    bytes += builder.orderType('Split');
+    bytes += builder.orderType('Split',   fontType: PosFontType.fontA,
+      width: PosTextSize.size1,
+      height: PosTextSize.size1,);
 
     bytes += builder.row2Columns(
       'Split',
       '${order.payments.last.splitNumber} / ${order.payments.last.splitTotal}',
+        fontType: PosFontType.fontA,
+      width: PosTextSize.size1,
+      height: PosTextSize.size1,
     );
 
     bytes += builder.separator();
@@ -457,10 +533,14 @@ class PrintUi {
       bytes += builder.orderItem(
         productName: item.productName,
         quantity: item.quantity,
+        quantityLabel: item.isWeighted ? item.quantityLabel : null,
         unitPrice: item.unitPrice.currencyFormatRpV2,
         totalPrice: item.totalPrice.currencyFormatRpV2,
         variantName: item.productVariantName,
         notes: item.notes,
+          fontType: PosFontType.fontA,
+      width: PosTextSize.size1,
+      height: PosTextSize.size1,
       );
     }
 
@@ -472,6 +552,9 @@ class PrintUi {
       discount: 0.currencyFormatRpV2,
       total: order.payments.last.amount.currencyFormatRpV2,
       paid: order.payments.last.amount.currencyFormatRpV2,
+        fontType: PosFontType.fontA,
+      width: PosTextSize.size1,
+      height: PosTextSize.size1,
     );
 
     bytes += builder.footer(message: 'Terima Kasih');

lib/presentation/components/print/receipt_component_builder.dart

@@ -9,26 +9,26 @@ class ReceiptComponentBuilder {
 
   ReceiptComponentBuilder({required this.generator, this.paperSize = 58});
 
-  /// Helper: returns size2 for 80mm paper, size1 for 58mm
-  PosTextSize get _titleSize =>
-      paperSize == 80 ? PosTextSize.size3 : PosTextSize.size1;
-
-  /// Font type per paper size — easy to change here
-  /// 58mm → fontA, 80mm → fontA
   PosFontType get _font =>
-      paperSize == 80 ? PosFontType.fontA : PosFontType.fontA;
+      paperSize == 80 ? PosFontType.fontB : PosFontType.fontA;
 
-  /// Text size for body — height size2 for 80mm to appear taller, size1 for 58mm
+  PosTextSize get _bodyHeight =>
-  PosTextSize get _bodySize =>
       paperSize == 80 ? PosTextSize.size2 : PosTextSize.size1;
 
-  /// Body width stays size1 always to prevent overflow
+  PosTextSize get _bodyWidth =>  paperSize == 80 ? PosTextSize.size2 : PosTextSize.size1;
-  PosTextSize get _bodyWidth => PosTextSize.size1;
 
-  /// Characters per line based on paper size (always size1 font)
+  /// Characters per line based on paper size and font
-  String get _separatorLine => paperSize == 80
+  String get _separatorLine {
-      ? '------------------------------------------------'
+    if (paperSize == 80) {
-      : '--------------------------------';
+      return _font == PosFontType.fontB
+          ? '----------------------------------------------------------------'
+          : '------------------------------------------------';
+    } else {
+      return _font == PosFontType.fontB
+          ? '------------------------------------------'
+          : '--------------------------------';
+    }
+  }
 
   // ---------------------------------------------------------------------------
   // Basic text
@@ -37,43 +37,48 @@ class ReceiptComponentBuilder {
   List<int> textCenter(
     String text, {
     bool bold = false,
-    PosTextSize height = PosTextSize.size1,
+    PosTextSize? height,
-    PosTextSize width = PosTextSize.size1,
+    PosTextSize? width,
+    PosFontType? fontType,
   }) {
     return generator.text(
       text,
       styles: PosStyles(
         bold: bold,
         align: PosAlign.center,
-        height: height,
+        height: height ?? _bodyHeight,
-        width: width,
+        width: width ?? _bodyWidth,
-        fontType: _font,
+        fontType: fontType ?? _font,
       ),
     );
   }
 
-  List<int> textLeft(String text, {bool bold = false}) {
+  List<int> textLeft(String text, {bool bold = false,  PosTextSize? height,
+    PosTextSize? width,
+    PosFontType? fontType,}) {
     return generator.text(
       text,
       styles: PosStyles(
         bold: bold,
         align: PosAlign.left,
-        fontType: _font,
+        height: height ?? _bodyHeight,
-        height: _bodySize,
+        width: width ?? _bodyWidth,
-        width: _bodyWidth,
+        fontType: fontType ?? _font,
       ),
     );
   }
 
-  List<int> textRight(String text, {bool bold = false}) {
+  List<int> textRight(String text, {bool bold = false,  PosTextSize? height,
+    PosTextSize? width,
+    PosFontType? fontType,}) {
     return generator.text(
       text,
       styles: PosStyles(
         bold: bold,
         align: PosAlign.right,
-        fontType: _font,
+       height: height ?? _bodyHeight,
-        height: _bodySize,
+        width: width ?? _bodyWidth,
-        width: _bodyWidth,
+        fontType: fontType ?? _font,
       ),
     );
   }
@@ -101,6 +106,9 @@ class ReceiptComponentBuilder {
     bool bold = false,
     int leftWidth = 6,
     int rightWidth = 6,
+     PosTextSize? height,
+    PosTextSize? width,
+    PosFontType? fontType,
   }) {
     return generator.row([
       PosColumn(
@@ -109,9 +117,9 @@ class ReceiptComponentBuilder {
         styles: PosStyles(
           align: PosAlign.left,
           bold: bold,
-          fontType: _font,
+       height: height ?? _bodyHeight,
-          height: _bodySize,
+        width: width ?? _bodyWidth,
-          width: _bodyWidth,
+        fontType: fontType ?? _font,
         ),
       ),
       PosColumn(
@@ -120,9 +128,9 @@ class ReceiptComponentBuilder {
         styles: PosStyles(
           align: PosAlign.right,
           bold: bold,
-          fontType: _font,
+         height: height ?? _bodyHeight,
-          height: _bodySize,
+        width: width ?? _bodyWidth,
-          width: _bodyWidth,
+        fontType: fontType ?? _font,
         ),
       ),
     ]);
@@ -163,8 +171,8 @@ class ReceiptComponentBuilder {
         bold: bold,
         align: PosAlign.left,
         fontType: _font,
-        height: PosTextSize.size2,
+        height: _bodyHeight,
-        width: PosTextSize.size2,
+        width: _bodyWidth,
       ),
     );
   }
@@ -182,25 +190,34 @@ class ReceiptComponentBuilder {
     required String outletName,
     required String address,
     required String phoneNumber,
+    PosTextSize? height,
+    PosTextSize? width,
+    PosFontType? fontType,
   }) {
     List<int> bytes = [];
-    bytes += textCenter(outletName, bold: true, height: _titleSize, width: _titleSize);
+    bytes += textCenter(outletName, height: PosTextSize.size2, width: PosTextSize.size2, fontType: fontType, bold: true);
-    bytes += textCenter(address);
+    bytes += textCenter(address, fontType: fontType, height: height ?? _bodyHeight, width: width ?? _bodyWidth);
-    bytes += textCenter(phoneNumber);
+    bytes += textCenter(phoneNumber, fontType: fontType, height: height ?? _bodyHeight, width: width ?? _bodyWidth);
     bytes += separator();
     return bytes;
-  }
+  } 
 
   /// Centered printer type label (e.g. KITCHEN, BAR)
   List<int> printerType({required String printerType}) {
-    return textCenter(printerType, bold: true, height: _titleSize, width: _titleSize);
+    return textCenter(printerType, bold: true);
   }
 
   /// Date + time row (receipt style)
-  List<int> dateTime(DateTime dateTime) {
+  List<int> dateTime(DateTime dateTime, { PosTextSize? height,
+    PosTextSize? width,
+    PosFontType? fontType,
+  }) {
     return row2Columns(
       DateFormat('dd MMM yyyy').format(dateTime),
       DateFormat('HH:mm').format(dateTime),
+       height: height ?? _bodyHeight,
+        width: width ?? _bodyWidth,
+        fontType: fontType ?? _font,
     );
   }
 
@@ -209,15 +226,21 @@ class ReceiptComponentBuilder {
     required String orderNumber,
     String? orderType,
     required String cashierName,
+    String? customerName,
   }) {
     List<int> bytes = [];
     final dateStr = DateFormat('dd-MM-yyyy HH:mm').format(DateTime.now());
-    bytes += textLeft('Order   : $orderNumber');
+    bytes += textLeft('Order    : $orderNumber');
-    bytes += textLeft('Date    : $dateStr');
+    bytes += textLeft('Date     : $dateStr');
-    if(orderType != null) {
+    
-       bytes += textLeft('Purpose : $orderType');
+    
+    if(customerName != null) {
+      bytes += textLeft('Customer : $customerName');
     }
-    bytes += textLeft('Waiter  : $cashierName');
+    if(orderType != null) {
+       bytes += textLeft('Purpose  : ${orderType.toUpperCase()}');
+    }
+    bytes += textLeft('Waiter   : $cashierName');
     return bytes;
   }
 
@@ -228,29 +251,48 @@ class ReceiptComponentBuilder {
     required String cashierName,
     String? paymentMethod,
     String? tableNumber,
+    PosTextSize? height,
+    PosTextSize? width,
+    PosFontType? fontType,
   }) {
     List<int> bytes = [];
      final dateStr = DateFormat('dd-MM-yyyy HH:mm').format(DateTime.now());
-      bytes += textLeft('Order    : $orderNumber');
+      bytes += textLeft('Order    : $orderNumber', fontType: fontType, height: height ?? _bodyHeight, width: width ?? _bodyWidth);
-      bytes += textLeft('Date     : $dateStr');
+      bytes += textLeft('Date     : $dateStr', fontType: fontType, height: height ?? _bodyHeight, width: width ?? _bodyWidth);
        if (tableNumber != null && tableNumber.isNotEmpty) {
-      bytes += textLeft('Table    : $tableNumber');
+      bytes += textLeft('Table    : $tableNumber', fontType: fontType, height: height ?? _bodyHeight, width: width ?? _bodyWidth);
     }
-      bytes += textLeft('Waiter   : $cashierName');
+      bytes += textLeft('Waiter   : $cashierName', fontType: fontType, height: height ?? _bodyHeight, width: width ?? _bodyWidth);
-      bytes += textLeft('Customer : $customerName');
+      bytes += textLeft('Customer : $customerName', fontType: fontType, height: height ?? _bodyHeight, width: width ?? _bodyWidth);
      
     if (paymentMethod != null) {
-       bytes += textLeft('Payment  : $paymentMethod');
+       bytes += textLeft('Payment  : $paymentMethod', fontType: fontType, height: height ?? _bodyHeight, width: width ?? _bodyWidth);
     }
    
     return bytes;
   }
 
   /// Order type banner (separator + type + separator)
-  List<int> orderType(String type) {
+  List<int> orderType(String type, {
+     PosTextSize? height,
+    PosTextSize? width,
+    PosFontType? fontType,
+  }) {
     List<int> bytes = [];
     bytes += separator();
-    bytes += textCenter(type, bold: true, height: _titleSize, width: _titleSize);
+    bytes += textCenter(type.toUpperCase(),  fontType: fontType, height: height ?? _bodyHeight, width: width ?? _bodyWidth, bold: true);
+    bytes += separator();
+    return bytes;
+  }
+
+    List<int> tableName(String table, {
+     PosTextSize? height,
+    PosTextSize? width,
+    PosFontType? fontType,
+  }) {
+    List<int> bytes = [];
+    bytes += separator();
+    bytes += textCenter( 'Table : ${table.isNotEmpty ? table : '-'}',  fontType: fontType, height: height ?? _bodyHeight, width: width ?? _bodyWidth, bold: true);
     bytes += separator();
     return bytes;
   }
@@ -259,19 +301,29 @@ class ReceiptComponentBuilder {
   List<int> orderItem({
     required String productName,
     required int quantity,
+
+    /// Untuk baris berbobot, isi dengan "4,2 ons" — angka quantity-nya selalu
+    /// 1 dan akan salah dibaca di struk.
+    String? quantityLabel,
     required String unitPrice,
     required String totalPrice,
     String? variantName,
     String? notes,
+     PosTextSize? height,
+    PosTextSize? width,
+    PosFontType? fontType,
   }) {
     List<int> bytes = [];
     final displayName = (variantName != null && variantName.isNotEmpty)
         ? '$productName ($variantName)'
         : productName;
-    bytes += textLeft(displayName, bold: paperSize == 80);
+    bytes += textLeft(displayName, bold: true, fontType: fontType, height: height ?? _bodyHeight, width: width ?? _bodyWidth);
-    bytes += row2Columns('$quantity x $unitPrice', totalPrice, leftWidth: 8, rightWidth: 4);
+    final quantityText = quantityLabel != null && quantityLabel.isNotEmpty
+        ? '$quantityLabel x $unitPrice'
+        : '${quantity}x $unitPrice';
+    bytes += row2Columns(quantityText, totalPrice, fontType: fontType, height: height ?? _bodyHeight, width: width ?? _bodyWidth,);
     if (notes != null && notes.isNotEmpty) {
-      bytes += row2Columns('Note', notes, leftWidth: 4, rightWidth: 8);
+      bytes += row2Columns('Note', notes, fontType: fontType, height: height ?? _bodyHeight, width: width ?? _bodyWidth, leftWidth: 4, rightWidth: 8);
     }
     bytes += emptyLines(1);
     return bytes;
@@ -284,17 +336,20 @@ class ReceiptComponentBuilder {
     required String discount,
     required String total,
     required String paid,
+     PosTextSize? height,
+    PosTextSize? width,
+    PosFontType? fontType,
   }) {
     List<int> bytes = [];
     bytes += separator();
     if (totalItems > 0) {
-      bytes += row2Columns('Total Item', totalItems.toString());
+      bytes += row2Columns('Total Item', totalItems.toString(), fontType: fontType, height: height ?? _bodyHeight, width: width ?? _bodyWidth,);
     }
-    bytes += row2Columns('Subtotal', subtotal);
+    bytes += row2Columns('Subtotal', subtotal, fontType: fontType, height: height ?? _bodyHeight, width: width ?? _bodyWidth,);
-    bytes += row2Columns('Diskon', discount);
+    bytes += row2Columns('Diskon', discount, fontType: fontType, height: height ?? _bodyHeight, width: width ?? _bodyWidth,);
     bytes += separator();
-    bytes += row2Columns('Total', total, bold: true);
+    bytes += row2Columns('Total', total, bold: true, fontType: fontType, height: height ?? _bodyHeight, width: width ?? _bodyWidth,);
-    bytes += row2Columns('Bayar', paid);
+    bytes += row2Columns('Bayar', paid, fontType: fontType, height: height ?? _bodyHeight, width: width ?? _bodyWidth,);
     bytes += separator();
     return bytes;
   }
@@ -303,7 +358,7 @@ class ReceiptComponentBuilder {
   List<int> footer({String message = 'Terima kasih'}) {
     List<int> bytes = [];
     bytes += emptyLines(2);
-    bytes += textCenter(message, bold: true, height: _titleSize, width: _titleSize);
+    bytes += textCenter(message, bold: true);
     if (kDebugMode) {
       bytes += textCenter('$paperSize MM');
     }

lib/presentation/pages/checkout/checkout_page.dart

@@ -7,6 +7,7 @@ import '../../../application/order/order_form/order_form_bloc.dart';
 import '../../../application/payment_method/payment_method_loader/payment_method_loader_bloc.dart';
 import '../../../application/table/table_loader/table_loader_bloc.dart';
 import '../../../common/theme/theme.dart';
+import '../../../domain/product/product.dart';
 import '../../../injection.dart';
 import '../../components/spaces/space.dart';
 import '../../components/toast/flushbar.dart';
@@ -86,14 +87,7 @@ class CheckoutPage extends StatelessWidget implements AutoRouteWrapper {
           tag: 'checkout_screen',
           child: BlocBuilder<CheckoutFormBloc, CheckoutFormState>(
             builder: (context, state) {
-              final price = state.items.fold(
+              final price = state.items.cartTotal.toInt();
-                0,
-                (previousValue, element) =>
-                    previousValue +
-                    (element.product.price.toInt() +
-                            (element.variant?.priceModifier.toInt() ?? 0)) *
-                        element.quantity,
-              );
 
               return Scaffold(
                 backgroundColor: AppColor.white,

lib/presentation/pages/main/pages/home/widgets/home_right_panel.dart

@@ -7,6 +7,7 @@ import 'package:flutter_bloc/flutter_bloc.dart';
 import '../../../../../../application/checkout/checkout_form/checkout_form_bloc.dart';
 import '../../../../../../common/extension/extension.dart';
 import '../../../../../../common/theme/theme.dart';
+import '../../../../../../domain/product/product.dart';
 import '../../../../../components/button/button.dart';
 import '../../../../../components/card/order_menu.dart';
 import '../../../../../components/spaces/space.dart';
@@ -21,15 +22,7 @@ class HomeRightPanel extends StatelessWidget {
   Widget build(BuildContext context) {
     return BlocBuilder<CheckoutFormBloc, CheckoutFormState>(
       builder: (context, state) {
-        final price = state.items.isEmpty
+        final price = state.items.cartTotal;
-            ? 0.0
-            : state.items
-                  .map(
-                    (e) =>
-                        (e.product.price + (e.variant?.priceModifier ?? 0)) *
-                        e.quantity,
-                  )
-                  .reduce((value, element) => value + element);
         log('🛒 Total Price: $price');
         return Align(
           alignment: Alignment.topCenter,
@@ -87,8 +80,12 @@ class HomeRightPanel extends StatelessWidget {
                       : ListView.separated(
                           shrinkWrap: true,
                           padding: const EdgeInsets.symmetric(horizontal: 16),
-                          itemBuilder: (context, index) =>
+                          itemBuilder: (context, index) => OrderMenu(
-                              OrderMenu(data: state.items[index]),
+                            // Baris berbobot bisa dihapus satu per satu, jadi
+                            // state tiap baris harus terikat ke identitasnya.
+                            key: ValueKey(state.items[index].lineId),
+                            data: state.items[index],
+                          ),
                           separatorBuilder: (context, index) =>
                               const SpaceHeight(1.0),
                           itemCount: state.items.length,

lib/presentation/pages/main/pages/setting/sections/printer/setting_printer_form.dart

@@ -32,6 +32,8 @@ class SettingPrinterForm extends StatefulWidget {
 
 class _SettingPrinterFormState extends State<SettingPrinterForm> {
   final TextEditingController _nameController = TextEditingController();
+  final TextEditingController _networkController = TextEditingController();
+
   void setup() {
     if (widget.printer != null) {
       context.read<PrinterFormBloc>().add(
@@ -50,6 +52,7 @@ class _SettingPrinterFormState extends State<SettingPrinterForm> {
         PrinterFormEvent.paperChanged(widget.printer!.paper),
       );
       _nameController.text = widget.printer!.name;
+      _networkController.text = widget.printer!.address;
     }
   }
 
@@ -163,6 +166,7 @@ class _SettingPrinterFormState extends State<SettingPrinterForm> {
                       )
                     : AppTextFormField(
                         label: 'Network',
+                        controller: _networkController,
                         onChanged: (value) {
                           context.read<PrinterFormBloc>().add(
                             PrinterFormEvent.addressChanged(value),

lib/presentation/pages/main/pages/setting/sections/setting_printer_section.dart

@@ -1,5 +1,9 @@
 import 'package:flutter/material.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
 
+import '../../../../../../application/printer/printer_form/printer_form_bloc.dart';
+import '../../../../../../application/printer/printer_loader/printer_loader_bloc.dart';
+import '../../../../../../injection.dart';
 import '../../../../../components/page/page_title.dart';
 import '../../../../../components/tab/custom_tabbar.dart';
 import 'printer/setting_printer_bar.dart';
@@ -11,18 +15,36 @@ import 'printer/setting_printer_ticket.dart';
 class SettingPrinterSection extends StatelessWidget {
   const SettingPrinterSection({super.key});
 
+  /// Tiap tab wajib punya `PrinterFormBloc` dan `PrinterLoaderBloc` sendiri.
+  ///
+  /// Kelima tab hidup bersamaan di dalam `TabBarView`, dan `PrinterFormBloc`
+  /// membangun entitas `Printer` sepenuhnya dari state-nya (`type`, `address`,
+  /// `code`, ...). Saat blocnya dibagi, tab yang terakhir menulis state akan
+  /// menang, lalu tombol Simpan di tab mana pun menyimpan state milik tab lain
+  /// — itu sebabnya printer kitchen bisa tersimpan dengan alamat IP yang benar
+  /// tapi `type` "Bluetooth" warisan tab Receipt.
+  Widget _scoped(Widget tab) {
+    return MultiBlocProvider(
+      providers: [
+        BlocProvider(create: (_) => getIt<PrinterFormBloc>()),
+        BlocProvider(create: (_) => getIt<PrinterLoaderBloc>()),
+      ],
+      child: tab,
+    );
+  }
+
   @override
   Widget build(BuildContext context) {
-    return const Column(
+    return Column(
       children: [
-        PageTitle(
+        const PageTitle(
           isBack: false,
           title: 'Printer',
           subtitle: 'Kelola printer untuk cetak struk',
         ),
         Expanded(
           child: CustomTabBar(
-            tabTitles: [
+            tabTitles: const [
               'Receipt Printer',
               'Checker Printer',
               'Kitchen Printer',
@@ -30,11 +52,11 @@ class SettingPrinterSection extends StatelessWidget {
               'Tiket Printer',
             ],
             tabViews: [
-              SettingPrinterReceipt(),
+              _scoped(const SettingPrinterReceipt()),
-              SettingPrinterChecker(),
+              _scoped(const SettingPrinterChecker()),
-              SettingPrinterKitchen(),
+              _scoped(const SettingPrinterKitchen()),
-              SettingPrinterBar(),
+              _scoped(const SettingPrinterBar()),
-              SettingPrinterTicket(),
+              _scoped(const SettingPrinterTicket()),
             ],
           ),
         ),

lib/presentation/pages/order/order_page.dart

@@ -3,10 +3,8 @@ import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 
 import '../../../application/order/order_loader/order_loader_bloc.dart';
-import '../../../application/printer/print_struck/print_struck_bloc.dart';
 import '../../../common/theme/theme.dart';
 import '../../../injection.dart';
-import '../../components/toast/flushbar.dart';
 import 'widgets/order_left_panel.dart';
 import 'widgets/order_right_panel.dart';
 
@@ -37,20 +35,7 @@ class OrderPage extends StatelessWidget implements AutoRouteWrapper {
             );
           },
         ),
-        BlocListener<PrintStruckBloc, PrintStruckState>(
+        // Hasil cetak dilaporkan lewat dialog progres global di `AppWidget`.
-          listenWhen: (previous, current) =>
-              previous.failureOrPrintStruck != current.failureOrPrintStruck,
-          listener: (context, state) {
-            state.failureOrPrintStruck.fold(() {}, (either) {
-              either.fold(
-                (f) => AppFlushbar.showPrinterFailureToast(context, f),
-                (success) {
-                  AppFlushbar.showSuccess(context, "Struck berhasil dicetak");
-                },
-              );
-            });
-          },
-        ),
       ],
       child: SafeArea(
         child: Scaffold(