add start/business unit

lib/core/constants/storage_constants.dart

@@ -124,6 +124,7 @@ class HiveTypeIds {
   static const int promotionModel = 26;
   static const int categoryModel = 27;
   static const int favoriteModel = 28;
+  static const int businessUnitModel = 29;
 
   // Enums (30-59)
   static const int userRole = 30;

lib/core/router/app_router.dart

@@ -10,6 +10,8 @@ import 'package:go_router/go_router.dart';
 import 'package:worker/features/account/presentation/pages/addresses_page.dart';
 import 'package:worker/features/account/presentation/pages/change_password_page.dart';
 import 'package:worker/features/account/presentation/pages/profile_edit_page.dart';
+import 'package:worker/features/auth/domain/entities/business_unit.dart';
+import 'package:worker/features/auth/presentation/pages/business_unit_selection_page.dart';
 import 'package:worker/features/auth/presentation/pages/login_page.dart';
 import 'package:worker/features/auth/presentation/pages/register_page.dart';
 import 'package:worker/features/cart/presentation/pages/cart_page.dart';
@@ -62,8 +64,30 @@ class AppRouter {
       GoRoute(
         path: RouteNames.register,
         name: RouteNames.register,
-        pageBuilder: (context, state) =>
+        pageBuilder: (context, state) {
-            MaterialPage(key: state.pageKey, child: const RegisterPage()),
+          final extra = state.extra as Map<String, dynamic>?;
+          return MaterialPage(
+            key: state.pageKey,
+            child: RegisterPage(
+              selectedBusinessUnit: extra?['businessUnit'] as BusinessUnit?,
+            ),
+          );
+        },
+      ),
+      GoRoute(
+        path: RouteNames.businessUnitSelection,
+        name: RouteNames.businessUnitSelection,
+        pageBuilder: (context, state) {
+          final extra = state.extra as Map<String, dynamic>?;
+          return MaterialPage(
+            key: state.pageKey,
+            child: BusinessUnitSelectionPage(
+              businessUnits: extra?['businessUnits'] as List<BusinessUnit>?,
+              isRegistrationFlow:
+                  (extra?['isRegistrationFlow'] as bool?) ?? false,
+            ),
+          );
+        },
       ),
 
       // Main Route (with bottom navigation)
@@ -447,6 +471,7 @@ class RouteNames {
   static const String login = '/login';
   static const String otpVerification = '/otp-verification';
   static const String register = '/register';
+  static const String businessUnitSelection = '/business-unit-selection';
 }
 
 /// Route Extensions

lib/features/auth/data/models/business_unit_model.dart

@@ -0,0 +1,91 @@
+/// Business Unit Data Model
+///
+/// Hive model for local storage of business units.
+library;
+
+import 'package:hive_ce/hive.dart';
+import 'package:worker/core/constants/storage_constants.dart';
+import 'package:worker/features/auth/domain/entities/business_unit.dart';
+
+part 'business_unit_model.g.dart';
+
+/// Business Unit Model for Hive storage
+@HiveType(typeId: HiveTypeIds.businessUnitModel)
+class BusinessUnitModel extends HiveObject {
+  /// Unique business unit identifier
+  @HiveField(0)
+  String id;
+
+  /// Business unit code (e.g., "VIKD", "HSKD", "LPKD")
+  @HiveField(1)
+  String code;
+
+  /// Display name
+  @HiveField(2)
+  String name;
+
+  /// Description
+  @HiveField(3)
+  String? description;
+
+  /// Whether this is the default unit
+  @HiveField(4)
+  bool isDefault;
+
+  BusinessUnitModel({
+    required this.id,
+    required this.code,
+    required this.name,
+    this.description,
+    this.isDefault = false,
+  });
+
+  /// Convert to domain entity
+  BusinessUnit toEntity() {
+    return BusinessUnit(
+      id: id,
+      code: code,
+      name: name,
+      description: description,
+      isDefault: isDefault,
+    );
+  }
+
+  /// Create from domain entity
+  factory BusinessUnitModel.fromEntity(BusinessUnit entity) {
+    return BusinessUnitModel(
+      id: entity.id,
+      code: entity.code,
+      name: entity.name,
+      description: entity.description,
+      isDefault: entity.isDefault,
+    );
+  }
+
+  /// Create from JSON
+  factory BusinessUnitModel.fromJson(Map<String, dynamic> json) {
+    return BusinessUnitModel(
+      id: json['id'] as String,
+      code: json['code'] as String,
+      name: json['name'] as String,
+      description: json['description'] as String?,
+      isDefault: json['is_default'] as bool? ?? false,
+    );
+  }
+
+  /// Convert to JSON
+  Map<String, dynamic> toJson() {
+    return {
+      'id': id,
+      'code': code,
+      'name': name,
+      'description': description,
+      'is_default': isDefault,
+    };
+  }
+
+  @override
+  String toString() {
+    return 'BusinessUnitModel(id: $id, code: $code, name: $name)';
+  }
+}

lib/features/auth/data/models/business_unit_model.g.dart

@@ -0,0 +1,53 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'business_unit_model.dart';
+
+// **************************************************************************
+// TypeAdapterGenerator
+// **************************************************************************
+
+class BusinessUnitModelAdapter extends TypeAdapter<BusinessUnitModel> {
+  @override
+  final typeId = 29;
+
+  @override
+  BusinessUnitModel read(BinaryReader reader) {
+    final numOfFields = reader.readByte();
+    final fields = <int, dynamic>{
+      for (int i = 0; i < numOfFields; i++) reader.readByte(): reader.read(),
+    };
+    return BusinessUnitModel(
+      id: fields[0] as String,
+      code: fields[1] as String,
+      name: fields[2] as String,
+      description: fields[3] as String?,
+      isDefault: fields[4] == null ? false : fields[4] as bool,
+    );
+  }
+
+  @override
+  void write(BinaryWriter writer, BusinessUnitModel obj) {
+    writer
+      ..writeByte(5)
+      ..writeByte(0)
+      ..write(obj.id)
+      ..writeByte(1)
+      ..write(obj.code)
+      ..writeByte(2)
+      ..write(obj.name)
+      ..writeByte(3)
+      ..write(obj.description)
+      ..writeByte(4)
+      ..write(obj.isDefault);
+  }
+
+  @override
+  int get hashCode => typeId.hashCode;
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is BusinessUnitModelAdapter &&
+          runtimeType == other.runtimeType &&
+          typeId == other.typeId;
+}

lib/features/auth/domain/entities/business_unit.dart

@@ -0,0 +1,93 @@
+/// Domain Entity: Business Unit
+///
+/// Represents a business unit that a user can access.
+library;
+
+/// Business Unit Entity
+///
+/// Represents a business division or unit that a user has access to.
+class BusinessUnit {
+  /// Unique business unit identifier
+  final String id;
+
+  /// Business unit code (e.g., "VIKD", "HSKD", "LPKD")
+  final String code;
+
+  /// Display name
+  final String name;
+
+  /// Description
+  final String? description;
+
+  /// Whether this is the default unit
+  final bool isDefault;
+
+  const BusinessUnit({
+    required this.id,
+    required this.code,
+    required this.name,
+    this.description,
+    this.isDefault = false,
+  });
+
+  /// Create from JSON map
+  factory BusinessUnit.fromJson(Map<String, dynamic> json) {
+    return BusinessUnit(
+      id: json['id'] as String,
+      code: json['code'] as String,
+      name: json['name'] as String,
+      description: json['description'] as String?,
+      isDefault: json['is_default'] as bool? ?? false,
+    );
+  }
+
+  /// Convert to JSON map
+  Map<String, dynamic> toJson() {
+    return {
+      'id': id,
+      'code': code,
+      'name': name,
+      'description': description,
+      'is_default': isDefault,
+    };
+  }
+
+  /// Copy with method for immutability
+  BusinessUnit copyWith({
+    String? id,
+    String? code,
+    String? name,
+    String? description,
+    bool? isDefault,
+  }) {
+    return BusinessUnit(
+      id: id ?? this.id,
+      code: code ?? this.code,
+      name: name ?? this.name,
+      description: description ?? this.description,
+      isDefault: isDefault ?? this.isDefault,
+    );
+  }
+
+  @override
+  bool operator ==(Object other) {
+    if (identical(this, other)) return true;
+
+    return other is BusinessUnit &&
+        other.id == id &&
+        other.code == code &&
+        other.name == name &&
+        other.description == description &&
+        other.isDefault == isDefault;
+  }
+
+  @override
+  int get hashCode {
+    return Object.hash(id, code, name, description, isDefault);
+  }
+
+  @override
+  String toString() {
+    return 'BusinessUnit(id: $id, code: $code, name: $name, isDefault: $isDefault)';
+  }
+}

lib/features/auth/presentation/pages/business_unit_selection_page.dart

@@ -0,0 +1,396 @@
+/// Business Unit Selection Page
+///
+/// Allows users to select a business unit during registration or after login
+/// when they have access to multiple units.
+library;
+
+import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
+import 'package:worker/core/constants/ui_constants.dart';
+import 'package:worker/core/router/app_router.dart';
+import 'package:worker/core/theme/colors.dart';
+import 'package:worker/features/auth/domain/entities/business_unit.dart';
+
+/// Business Unit Selection Page
+///
+/// Flow:
+/// 1. During registration: User selects unit before going to register page
+/// 2. After login: User selects unit if they have multiple units
+class BusinessUnitSelectionPage extends StatefulWidget {
+  const BusinessUnitSelectionPage({
+    super.key,
+    this.businessUnits,
+    this.isRegistrationFlow = false,
+    this.onUnitSelected,
+  });
+
+  /// List of available business units
+  final List<BusinessUnit>? businessUnits;
+
+  /// Whether this is part of registration flow
+  final bool isRegistrationFlow;
+
+  /// Callback when business unit is selected (for registration flow)
+  final void Function(BusinessUnit)? onUnitSelected;
+
+  @override
+  State<BusinessUnitSelectionPage> createState() =>
+      _BusinessUnitSelectionPageState();
+}
+
+class _BusinessUnitSelectionPageState extends State<BusinessUnitSelectionPage> {
+  BusinessUnit? _selectedUnit;
+  late List<BusinessUnit> _availableUnits;
+
+  @override
+  void initState() {
+    super.initState();
+    // Use provided units or mock data for registration flow
+    _availableUnits = widget.businessUnits ?? _getMockBusinessUnits();
+  }
+
+  /// Mock business units for registration flow
+  /// TODO: Replace with actual API data when backend is ready
+  List<BusinessUnit> _getMockBusinessUnits() {
+    return [
+      const BusinessUnit(
+        id: '1',
+        code: 'VIKD',
+        name: 'VIKD',
+        description: 'Đơn vị kinh doanh VIKD',
+      ),
+      const BusinessUnit(
+        id: '2',
+        code: 'HSKD',
+        name: 'HSKD',
+        description: 'Đơn vị kinh doanh HSKD',
+      ),
+      const BusinessUnit(
+        id: '3',
+        code: 'LPKD',
+        name: 'LPKD',
+        description: 'Đơn vị kinh doanh LPKD',
+      ),
+    ];
+  }
+
+  void _handleContinue() {
+    if (_selectedUnit == null) {
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(
+          content: const Text('Vui lòng chọn đơn vị kinh doanh'),
+          backgroundColor: AppColors.danger,
+        ),
+      );
+      return;
+    }
+
+    if (widget.isRegistrationFlow) {
+      // Registration flow: pass selected unit to register page
+      widget.onUnitSelected?.call(_selectedUnit!);
+      context.pushNamed(
+        RouteNames.register,
+        extra: {'businessUnit': _selectedUnit},
+      );
+    } else {
+      // Login flow: save selected unit and navigate to home
+      // TODO: Save selected unit to local storage/state
+      context.goNamed(RouteNames.home);
+    }
+  }
+
+  void _showInfoDialog() {
+    showDialog<void>(
+      context: context,
+      builder: (context) => AlertDialog(
+        title: const Text('Đơn vị kinh doanh'),
+        content: const Text(
+          'Chọn đơn vị kinh doanh mà bạn muốn truy cập. '
+          'Bạn có thể thay đổi đơn vị sau khi đăng nhập.',
+        ),
+        actions: [
+          TextButton(
+            onPressed: () => Navigator.pop(context),
+            child: const Text('Đóng'),
+          ),
+        ],
+      ),
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      backgroundColor: AppColors.white,
+      appBar: AppBar(
+        backgroundColor: AppColors.white,
+        elevation: AppBarSpecs.elevation,
+        leading: IconButton(
+          icon: const Icon(Icons.arrow_back, color: Colors.black),
+          onPressed: () => context.pop(),
+        ),
+        title: const Text(
+          'Đơn vị kinh doanh',
+          style: TextStyle(
+            color: Colors.black,
+            fontSize: 18,
+            fontWeight: FontWeight.w600,
+          ),
+        ),
+        centerTitle: false,
+        actions: [
+          IconButton(
+            icon: const Icon(Icons.info_outline, color: Colors.black),
+            onPressed: _showInfoDialog,
+          ),
+          const SizedBox(width: AppSpacing.sm),
+        ],
+      ),
+      body: SingleChildScrollView(
+        child: Padding(
+          padding: const EdgeInsets.all(AppSpacing.lg),
+          child: Column(
+            crossAxisAlignment: CrossAxisAlignment.stretch,
+            children: [
+              // Logo Section
+              Center(
+                child: Container(
+                  padding: const EdgeInsets.all(20),
+                  decoration: BoxDecoration(
+                    gradient: const LinearGradient(
+                      begin: Alignment.topLeft,
+                      end: Alignment.bottomRight,
+                      colors: [AppColors.primaryBlue, AppColors.lightBlue],
+                    ),
+                    borderRadius: BorderRadius.circular(20),
+                  ),
+                  child: const Column(
+                    mainAxisSize: MainAxisSize.min,
+                    children: [
+                      Text(
+                        'DBIZ',
+                        style: TextStyle(
+                          color: Colors.white,
+                          fontSize: 32,
+                          fontWeight: FontWeight.w700,
+                        ),
+                      ),
+                      Text(
+                        'Worker App',
+                        style: TextStyle(color: Colors.white, fontSize: 12),
+                      ),
+                    ],
+                  ),
+                ),
+              ),
+
+              const SizedBox(height: AppSpacing.xl),
+
+              // Welcome Message
+              const Text(
+                'Chọn đơn vị kinh doanh để tiếp tục',
+                textAlign: TextAlign.center,
+                style: TextStyle(color: AppColors.grey500, fontSize: 14),
+              ),
+
+              const SizedBox(height: 40),
+
+              // Business Unit Selection List
+              Column(
+                crossAxisAlignment: CrossAxisAlignment.start,
+                children: [
+                  const Padding(
+                    padding: EdgeInsets.symmetric(horizontal: AppSpacing.sm),
+                    child: Text(
+                      'Đơn vị kinh doanh',
+                      style: TextStyle(
+                        fontSize: 14,
+                        fontWeight: FontWeight.w500,
+                        color: AppColors.grey900,
+                      ),
+                    ),
+                  ),
+                  const SizedBox(height: AppSpacing.md),
+                  // Business Unit List Tiles
+                  ...(_availableUnits.asMap().entries.map((entry) {
+                    final index = entry.key;
+                    final unit = entry.value;
+                    final isSelected = _selectedUnit?.id == unit.id;
+                    final isFirst = index == 0;
+                    final isLast = index == _availableUnits.length - 1;
+
+                    return Container(
+                      margin: EdgeInsets.only(
+                        bottom: isLast ? 0 : AppSpacing.xs,
+                      ),
+                      decoration: BoxDecoration(
+                        color: AppColors.white,
+                        border: Border.all(
+                          color: isSelected
+                              ? AppColors.primaryBlue
+                              : AppColors.grey100,
+                          width: isSelected ? 2 : 1,
+                        ),
+                        borderRadius: BorderRadius.vertical(
+                          top: isFirst
+                              ? const Radius.circular(
+                                  InputFieldSpecs.borderRadius,
+                                )
+                              : Radius.zero,
+                          bottom: isLast
+                              ? const Radius.circular(
+                                  InputFieldSpecs.borderRadius,
+                                )
+                              : Radius.zero,
+                        ),
+                        boxShadow: isSelected
+                            ? [
+                                BoxShadow(
+                                  color: AppColors.primaryBlue.withValues(
+                                    alpha: 0.1,
+                                  ),
+                                  blurRadius: 8,
+                                  offset: const Offset(0, 2),
+                                ),
+                              ]
+                            : null,
+                      ),
+                      child: InkWell(
+                        onTap: () {
+                          setState(() {
+                            _selectedUnit = unit;
+                          });
+                        },
+                        borderRadius: BorderRadius.vertical(
+                          top: isFirst
+                              ? const Radius.circular(
+                                  InputFieldSpecs.borderRadius,
+                                )
+                              : Radius.zero,
+                          bottom: isLast
+                              ? const Radius.circular(
+                                  InputFieldSpecs.borderRadius,
+                                )
+                              : Radius.zero,
+                        ),
+                        child: Padding(
+                          padding: const EdgeInsets.symmetric(
+                            horizontal: AppSpacing.lg,
+                            vertical: AppSpacing.md,
+                          ),
+                          child: Row(
+                            children: [
+                              // Icon
+                              Container(
+                                width: 40,
+                                height: 40,
+                                decoration: BoxDecoration(
+                                  color: isSelected
+                                      ? AppColors.primaryBlue.withValues(
+                                          alpha: 0.1,
+                                        )
+                                      : AppColors.grey50,
+                                  borderRadius: BorderRadius.circular(8),
+                                ),
+                                child: Icon(
+                                  Icons.business,
+                                  color: isSelected
+                                      ? AppColors.primaryBlue
+                                      : AppColors.grey500,
+                                  size: 20,
+                                ),
+                              ),
+                              const SizedBox(width: AppSpacing.md),
+                              // Unit Name
+                              Expanded(
+                                child: Column(
+                                  crossAxisAlignment: CrossAxisAlignment.start,
+                                  children: [
+                                    Text(
+                                      unit.name,
+                                      style: TextStyle(
+                                        fontSize: 16,
+                                        fontWeight: isSelected
+                                            ? FontWeight.w600
+                                            : FontWeight.w500,
+                                        color: isSelected
+                                            ? AppColors.primaryBlue
+                                            : AppColors.grey900,
+                                      ),
+                                    ),
+                                    if (unit.description != null) ...[
+                                      const SizedBox(height: 2),
+                                      Text(
+                                        unit.description!,
+                                        style: const TextStyle(
+                                          fontSize: 12,
+                                          color: AppColors.grey500,
+                                        ),
+                                      ),
+                                    ],
+                                  ],
+                                ),
+                              ),
+                              // Radio indicator
+                              Container(
+                                width: 20,
+                                height: 20,
+                                decoration: BoxDecoration(
+                                  shape: BoxShape.circle,
+                                  border: Border.all(
+                                    color: isSelected
+                                        ? AppColors.primaryBlue
+                                        : AppColors.grey500,
+                                    width: 2,
+                                  ),
+                                  color: isSelected
+                                      ? AppColors.primaryBlue
+                                      : Colors.transparent,
+                                ),
+                                child: isSelected
+                                    ? const Icon(
+                                        Icons.circle,
+                                        size: 10,
+                                        color: AppColors.white,
+                                      )
+                                    : null,
+                              ),
+                            ],
+                          ),
+                        ),
+                      ),
+                    );
+                  }).toList()),
+                ],
+              ),
+
+              const SizedBox(height: AppSpacing.xl),
+
+              // Continue Button
+              SizedBox(
+                height: ButtonSpecs.height,
+                child: ElevatedButton(
+                  onPressed: _handleContinue,
+                  style: ElevatedButton.styleFrom(
+                    backgroundColor: AppColors.primaryBlue,
+                    foregroundColor: Colors.white,
+                    elevation: 0,
+                    shape: RoundedRectangleBorder(
+                      borderRadius: BorderRadius.circular(
+                        ButtonSpecs.borderRadius,
+                      ),
+                    ),
+                  ),
+                  child: const Text(
+                    'Tiếp tục',
+                    style: TextStyle(fontSize: 16, fontWeight: FontWeight.w600),
+                  ),
+                ),
+              ),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}

lib/features/auth/presentation/pages/login_page.dart

@@ -115,15 +115,12 @@ class _LoginPageState extends ConsumerState<LoginPage> {
     }
   }
 
-  /// Navigate to register page
+  /// Navigate to business unit selection (registration flow)
   void _navigateToRegister() {
-    // TODO: Navigate to register page when route is set up
+    // Navigate to business unit selection page first
-    // context.go('/register');
+    context.pushNamed(
-    ScaffoldMessenger.of(context).showSnackBar(
+      RouteNames.businessUnitSelection,
-      const SnackBar(
+      extra: {'isRegistrationFlow': true},
-        content: Text('Chức năng đăng ký đang được phát triển'),
-        behavior: SnackBarBehavior.floating,
-      ),
     );
   }
 

lib/features/auth/presentation/pages/register_page.dart

@@ -14,6 +14,7 @@ import 'package:image_picker/image_picker.dart';
 import 'package:worker/core/constants/ui_constants.dart';
 import 'package:worker/core/theme/colors.dart';
 import 'package:worker/core/utils/validators.dart';
+import 'package:worker/features/auth/domain/entities/business_unit.dart';
 import 'package:worker/features/auth/presentation/widgets/phone_input_field.dart';
 import 'package:worker/features/auth/presentation/widgets/file_upload_card.dart';
 import 'package:worker/features/auth/presentation/widgets/role_dropdown.dart';
@@ -29,10 +30,13 @@ import 'package:worker/features/auth/presentation/widgets/role_dropdown.dart';
 /// - Terms and conditions checkbox
 ///
 /// Navigation:
-/// - From: Login page
+/// - From: Business unit selection page
 /// - To: OTP verification (broker/other) or pending approval (worker/dealer)
 class RegisterPage extends ConsumerStatefulWidget {
-  const RegisterPage({super.key});
+  /// Selected business unit from previous screen
+  final BusinessUnit? selectedBusinessUnit;
+
+  const RegisterPage({super.key, this.selectedBusinessUnit});
 
   @override
   ConsumerState<RegisterPage> createState() => _RegisterPageState();
@@ -235,6 +239,18 @@ class _RegisterPageState extends ConsumerState<RegisterPage> {
 
     try {
       // TODO: Implement actual registration API call
+      // Include widget.selectedBusinessUnit?.id in the API request
+      // Example:
+      // final result = await authRepository.register(
+      //   fullName: _fullNameController.text.trim(),
+      //   phone: _phoneController.text.trim(),
+      //   email: _emailController.text.trim(),
+      //   password: _passwordController.text,
+      //   role: _selectedRole,
+      //   businessUnitId: widget.selectedBusinessUnit?.id,
+      //   ...
+      // );
+
       // For now, simulate API delay
       await Future.delayed(const Duration(seconds: 2));
 

lib/hive_registrar.g.dart

@@ -7,6 +7,7 @@ import 'package:worker/core/database/models/cached_data.dart';
 import 'package:worker/core/database/models/enums.dart';
 import 'package:worker/features/account/data/models/audit_log_model.dart';
 import 'package:worker/features/account/data/models/payment_reminder_model.dart';
+import 'package:worker/features/auth/data/models/business_unit_model.dart';
 import 'package:worker/features/auth/data/models/user_model.dart';
 import 'package:worker/features/auth/data/models/user_session_model.dart';
 import 'package:worker/features/cart/data/models/cart_item_model.dart';
@@ -37,6 +38,7 @@ import 'package:worker/features/showrooms/data/models/showroom_product_model.dar
 extension HiveRegistrar on HiveInterface {
   void registerAdapters() {
     registerAdapter(AuditLogModelAdapter());
+    registerAdapter(BusinessUnitModelAdapter());
     registerAdapter(CachedDataAdapter());
     registerAdapter(CartItemModelAdapter());
     registerAdapter(CartModelAdapter());
@@ -92,6 +94,7 @@ extension HiveRegistrar on HiveInterface {
 extension IsolatedHiveRegistrar on IsolatedHiveInterface {
   void registerAdapters() {
     registerAdapter(AuditLogModelAdapter());
+    registerAdapter(BusinessUnitModelAdapter());
     registerAdapter(CachedDataAdapter());
     registerAdapter(CartItemModelAdapter());
     registerAdapter(CartModelAdapter());