feat: Flutter client localisation (12 languages)

Add flutter_localizations + intl, 12 ARB files (en/ru/es/de/fr/it/pt/zh/ja/ko/ar/hi),
replace all hardcoded Russian UI strings with AppLocalizations, detect system locale
on first launch, localise bottom nav bar labels, document rule in CLAUDE.md.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

client/lib/features/home/home_provider.dart

@@ -56,3 +56,23 @@ final todayJobsProvider =
     StateNotifierProvider<TodayJobsNotifier, AsyncValue<List<DishJobSummary>>>(
   (ref) => TodayJobsNotifier(ref.read(recognitionServiceProvider)),
 );
+
+// ── All recognition jobs (history screen) ─────────────────────
+
+class AllJobsNotifier extends StateNotifier<AsyncValue<List<DishJobSummary>>> {
+  final RecognitionService _service;
+
+  AllJobsNotifier(this._service) : super(const AsyncValue.loading()) {
+    load();
+  }
+
+  Future<void> load() async {
+    state = const AsyncValue.loading();
+    state = await AsyncValue.guard(() => _service.listAllJobs());
+  }
+}
+
+final allJobsProvider =
+    StateNotifierProvider<AllJobsNotifier, AsyncValue<List<DishJobSummary>>>(
+  (ref) => AllJobsNotifier(ref.read(recognitionServiceProvider)),
+);

client/lib/features/home/home_screen.dart

@@ -2,9 +2,11 @@ import 'dart:math' as math;
 
 import 'package:cached_network_image/cached_network_image.dart';
 import 'package:flutter/material.dart';
+import 'package:food_ai/l10n/app_localizations.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:go_router/go_router.dart';
 import 'package:image_picker/image_picker.dart';
+import 'package:intl/intl.dart';
 
 import '../../core/storage/local_preferences_provider.dart';
 import '../../core/theme/app_colors.dart';
@@ -24,6 +26,7 @@ class HomeScreen extends ConsumerWidget {
 
   @override
   Widget build(BuildContext context, WidgetRef ref) {
+    final l10n = AppLocalizations.of(context)!;
     final homeSummaryState = ref.watch(homeProvider);
     final profile = ref.watch(profileProvider).valueOrNull;
     final userName = profile?.name;
@@ -100,7 +103,7 @@ class HomeScreen extends ConsumerWidget {
                   _QuickActionsRow(),
                   if (recommendations.isNotEmpty) ...[
                     const SizedBox(height: 20),
-                    _SectionTitle('Рекомендуем приготовить'),
+                    _SectionTitle(l10n.recommendCook),
                     const SizedBox(height: 12),
                     _RecommendationsRow(recipes: recommendations),
                   ],
@@ -120,26 +123,25 @@ class _AppBar extends StatelessWidget {
   final String? userName;
   const _AppBar({this.userName});
 
-  String get _greetingBase {
+  String _greetingBase(AppLocalizations l10n) {
     final hour = DateTime.now().hour;
-    if (hour < 12) return 'Доброе утро';
-    if (hour < 18) return 'Добрый день';
-    return 'Добрый вечер';
-  }
-
-  String get _greeting {
-    final name = userName;
-    if (name != null && name.isNotEmpty) return '$_greetingBase, $name!';
-    return _greetingBase;
+    if (hour < 12) return l10n.greetingMorning;
+    if (hour < 18) return l10n.greetingAfternoon;
+    return l10n.greetingEvening;
   }
 
   @override
   Widget build(BuildContext context) {
+    final l10n = AppLocalizations.of(context)!;
     final theme = Theme.of(context);
+    final base = _greetingBase(l10n);
+    final greeting = (userName != null && userName!.isNotEmpty)
+        ? '$base, $userName!'
+        : base;
     return SliverAppBar(
       pinned: false,
       floating: true,
-      title: Text(_greeting, style: theme.textTheme.titleMedium),
+      title: Text(greeting, style: theme.textTheme.titleMedium),
     );
   }
 }
@@ -160,11 +162,6 @@ class _DateSelector extends StatefulWidget {
 }
 
 class _DateSelectorState extends State<_DateSelector> {
-  static const _weekDayShort = ['Пн', 'Вт', 'Ср', 'Чт', 'Пт', 'Сб', 'Вс'];
-  static const _monthNames = [
-    'января', 'февраля', 'марта', 'апреля', 'мая', 'июня',
-    'июля', 'августа', 'сентября', 'октября', 'ноября', 'декабря',
-  ];
   // Total days available in the past (index 0 = today, index N-1 = oldest)
   static const _totalDays = 365;
   static const _pillWidth = 48.0;
@@ -172,12 +169,10 @@ class _DateSelectorState extends State<_DateSelector> {
 
   late final ScrollController _scrollController;
 
-  String _formatSelectedDate(DateTime date) {
+  String _formatSelectedDate(DateTime date, String localeCode) {
     final now = DateTime.now();
-    final dayName = _weekDayShort[date.weekday - 1];
-    final month = _monthNames[date.month - 1];
     final yearSuffix = date.year != now.year ? ' ${date.year}' : '';
-    return '$dayName, ${date.day} $month$yearSuffix';
+    return DateFormat('EEE, d MMMM', localeCode).format(date) + yearSuffix;
   }
 
   // Index in the reversed list: 0 = today, 1 = yesterday, …
@@ -253,6 +248,8 @@ class _DateSelectorState extends State<_DateSelector> {
 
   @override
   Widget build(BuildContext context) {
+    final l10n = AppLocalizations.of(context)!;
+    final localeCode = Localizations.localeOf(context).toString();
     final theme = Theme.of(context);
     final today = DateTime.now();
     final todayNormalized = DateTime(today.year, today.month, today.day);
@@ -276,7 +273,7 @@ class _DateSelectorState extends State<_DateSelector> {
               ),
               Expanded(
                 child: Text(
-                  _formatSelectedDate(widget.selectedDate),
+                  _formatSelectedDate(widget.selectedDate, localeCode),
                   style: theme.textTheme.labelMedium
                       ?.copyWith(fontWeight: FontWeight.w600),
                   textAlign: TextAlign.center,
@@ -290,7 +287,7 @@ class _DateSelectorState extends State<_DateSelector> {
                     padding: const EdgeInsets.symmetric(horizontal: 8),
                   ),
                   child: Text(
-                    'Сегодня',
+                    l10n.today,
                     style: theme.textTheme.labelMedium
                         ?.copyWith(color: theme.colorScheme.primary),
                   ),
@@ -336,7 +333,7 @@ class _DateSelectorState extends State<_DateSelector> {
                     mainAxisAlignment: MainAxisAlignment.center,
                     children: [
                       Text(
-                        _weekDayShort[date.weekday - 1],
+                        DateFormat('EEE', localeCode).format(date),
                         style: theme.textTheme.labelSmall?.copyWith(
                           color: isSelected
                               ? theme.colorScheme.onPrimary
@@ -386,21 +383,22 @@ class _CaloriesCard extends StatelessWidget {
   Widget build(BuildContext context) {
     if (dailyGoal == 0) return const SizedBox.shrink();
 
+    final l10n = AppLocalizations.of(context)!;
     final theme = Theme.of(context);
     final logged = loggedCalories.toInt();
     final rawProgress = dailyGoal > 0 ? loggedCalories / dailyGoal : 0.0;
     final isOverGoal = rawProgress > 1.0;
     final ringColor = _ringColorFor(rawProgress, goalType);
 
-    final String secondaryLabel;
+    final String secondaryValue;
     final Color secondaryColor;
     if (isOverGoal) {
       final overBy = (loggedCalories - dailyGoal).toInt();
-      secondaryLabel = '+$overBy перебор';
+      secondaryValue = '+$overBy ${l10n.caloriesUnit}';
       secondaryColor = AppColors.error;
     } else {
       final remaining = (dailyGoal - loggedCalories).toInt();
-      secondaryLabel = 'осталось $remaining';
+      secondaryValue = '$remaining ${l10n.caloriesUnit}';
       secondaryColor = AppColors.textSecondary;
     }
 
@@ -433,14 +431,14 @@ class _CaloriesCard extends StatelessWidget {
                         ),
                       ),
                       Text(
-                        'ккал',
+                        l10n.caloriesUnit,
                         style: theme.textTheme.bodySmall?.copyWith(
                           color: AppColors.textSecondary,
                         ),
                       ),
                       const SizedBox(height: 4),
                       Text(
-                        'цель: $dailyGoal',
+                        '${l10n.goalLabel} $dailyGoal',
                         style: theme.textTheme.labelSmall?.copyWith(
                           color: AppColors.textSecondary,
                         ),
@@ -456,20 +454,20 @@ class _CaloriesCard extends StatelessWidget {
                 crossAxisAlignment: CrossAxisAlignment.start,
                 children: [
                   _CalorieStat(
-                    label: 'Потреблено',
-                    value: '$logged ккал',
+                    label: l10n.consumed,
+                    value: '$logged ${l10n.caloriesUnit}',
                     valueColor: ringColor,
                   ),
                   const SizedBox(height: 12),
                   _CalorieStat(
-                    label: isOverGoal ? 'Превышение' : 'Осталось',
-                    value: secondaryLabel,
+                    label: isOverGoal ? l10n.exceeded : l10n.remaining,
+                    value: secondaryValue,
                     valueColor: secondaryColor,
                   ),
                   const SizedBox(height: 12),
                   _CalorieStat(
-                    label: 'Цель',
-                    value: '$dailyGoal ккал',
+                    label: l10n.goalLabel.replaceAll(':', '').trim(),
+                    value: '$dailyGoal ${l10n.caloriesUnit}',
                     valueColor: AppColors.textPrimary,
                   ),
                 ],
@@ -532,28 +530,29 @@ class _MacrosRow extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final l10n = AppLocalizations.of(context)!;
     return Row(
       children: [
         Expanded(
           child: _MacroChip(
-            label: 'Белки',
-            value: '${proteinG.toStringAsFixed(1)} г',
+            label: l10n.proteinLabel,
+            value: '${proteinG.toStringAsFixed(1)} ${l10n.gramsUnit}',
             color: Colors.blue,
           ),
         ),
         const SizedBox(width: 8),
         Expanded(
           child: _MacroChip(
-            label: 'Жиры',
-            value: '${fatG.toStringAsFixed(1)} г',
+            label: l10n.fatLabel,
+            value: '${fatG.toStringAsFixed(1)} ${l10n.gramsUnit}',
             color: Colors.orange,
           ),
         ),
         const SizedBox(width: 8),
         Expanded(
           child: _MacroChip(
-            label: 'Углеводы',
-            value: '${carbsG.toStringAsFixed(1)} г',
+            label: l10n.carbsLabel,
+            value: '${carbsG.toStringAsFixed(1)} ${l10n.gramsUnit}',
             color: Colors.green,
           ),
         ),
@@ -712,11 +711,12 @@ class _DailyMealsSection extends ConsumerWidget {
 
   @override
   Widget build(BuildContext context, WidgetRef ref) {
+    final l10n = AppLocalizations.of(context)!;
     final theme = Theme.of(context);
     return Column(
       crossAxisAlignment: CrossAxisAlignment.start,
       children: [
-        Text('Приёмы пищи', style: theme.textTheme.titleSmall),
+        Text(l10n.mealsSection, style: theme.textTheme.titleSmall),
         const SizedBox(height: 8),
         ...mealTypeIds.map((mealTypeId) {
           final mealTypeOption = mealTypeById(mealTypeId);
@@ -743,6 +743,8 @@ Future<void> _pickAndShowDishResult(
   WidgetRef ref,
   String mealTypeId,
 ) async {
+  final l10n = AppLocalizations.of(context)!;
+
   // 1. Choose image source.
   final source = await showModalBottomSheet<ImageSource>(
     context: context,
@@ -752,12 +754,12 @@ Future<void> _pickAndShowDishResult(
         children: [
           ListTile(
             leading: const Icon(Icons.camera_alt),
-            title: const Text('Камера'),
+            title: Text(l10n.camera),
             onTap: () => Navigator.pop(context, ImageSource.camera),
           ),
           ListTile(
             leading: const Icon(Icons.photo_library),
-            title: const Text('Галерея'),
+            title: Text(l10n.gallery),
             onTap: () => Navigator.pop(context, ImageSource.gallery),
           ),
         ],
@@ -778,7 +780,7 @@ Future<void> _pickAndShowDishResult(
   // 3. Show progress dialog.
   // Capture root navigator before await to avoid GoRouter inner-navigator issues.
   final rootNavigator = Navigator.of(context, rootNavigator: true);
-  final progressNotifier = _DishProgressNotifier();
+  final progressNotifier = _DishProgressNotifier(initialMessage: l10n.analyzingPhoto);
   showDialog(
     context: context,
     barrierDismissible: false,
@@ -809,11 +811,11 @@ Future<void> _pickAndShowDishResult(
       switch (event) {
         case DishJobQueued():
           progressNotifier.update(
-            message: 'Вы в очереди #${event.position + 1} · ~${event.estimatedSeconds} сек',
+            message: '${l10n.inQueue} · ${l10n.queuePosition(event.position + 1)}',
             showUpgrade: event.position > 0,
           );
         case DishJobProcessing():
-          progressNotifier.update(message: 'Обрабатываем...');
+          progressNotifier.update(message: l10n.processing);
         case DishJobDone():
           rootNavigator.pop(); // close dialog
           if (!context.mounted) return;
@@ -825,6 +827,7 @@ Future<void> _pickAndShowDishResult(
               dish: event.result,
               preselectedMealType: mealTypeId.isNotEmpty ? mealTypeId : null,
               jobId: jobCreated.jobId,
+              targetDate: targetDate,
               onAdded: () => Navigator.pop(sheetContext),
             ),
           );
@@ -836,7 +839,7 @@ Future<void> _pickAndShowDishResult(
             SnackBar(
               content: Text(event.error),
               action: SnackBarAction(
-                label: 'Повторить',
+                label: l10n.retry,
                 onPressed: () => _pickAndShowDishResult(context, ref, mealTypeId),
               ),
             ),
@@ -849,9 +852,7 @@ Future<void> _pickAndShowDishResult(
     if (context.mounted) {
       rootNavigator.pop(); // close dialog
       ScaffoldMessenger.of(context).showSnackBar(
-        const SnackBar(
-          content: Text('Не удалось распознать. Попробуйте ещё раз.'),
-        ),
+        SnackBar(content: Text(l10n.recognitionFailed)),
       );
     }
   }
@@ -872,7 +873,10 @@ class _DishProgressState {
 }
 
 class _DishProgressNotifier extends ChangeNotifier {
-  _DishProgressState _state = const _DishProgressState(message: 'Анализируем фото...');
+  late _DishProgressState _state;
+
+  _DishProgressNotifier({required String initialMessage})
+      : _state = _DishProgressState(message: initialMessage);
 
   _DishProgressState get state => _state;
 
@@ -889,6 +893,7 @@ class _DishProgressDialog extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final l10n = AppLocalizations.of(context)!;
     return ListenableBuilder(
       listenable: notifier,
       builder: (context, _) {
@@ -903,7 +908,7 @@ class _DishProgressDialog extends StatelessWidget {
               if (state.showUpgrade) ...[
                 const SizedBox(height: 12),
                 Text(
-                  'Хотите без очереди? Upgrade →',
+                  l10n.upgradePrompt,
                   style: Theme.of(context).textTheme.bodySmall?.copyWith(
                         color: Theme.of(context).colorScheme.primary,
                       ),
@@ -931,6 +936,7 @@ class _MealCard extends ConsumerWidget {
 
   @override
   Widget build(BuildContext context, WidgetRef ref) {
+    final l10n = AppLocalizations.of(context)!;
     final theme = Theme.of(context);
     final totalCalories = entries.fold<double>(
         0.0, (sum, entry) => sum + (entry.calories ?? 0));
@@ -946,12 +952,12 @@ class _MealCard extends ConsumerWidget {
                 Text(mealTypeOption.emoji,
                     style: const TextStyle(fontSize: 20)),
                 const SizedBox(width: 8),
-                Text(mealTypeOption.label,
+                Text(mealTypeLabel(mealTypeOption.id, l10n),
                     style: theme.textTheme.titleSmall),
                 const Spacer(),
                 if (totalCalories > 0)
                   Text(
-                    '${totalCalories.toInt()} ккал',
+                    '${totalCalories.toInt()} ${l10n.caloriesUnit}',
                     style: theme.textTheme.bodySmall?.copyWith(
                       color: theme.colorScheme.onSurfaceVariant,
                     ),
@@ -959,7 +965,7 @@ class _MealCard extends ConsumerWidget {
                 IconButton(
                   icon: const Icon(Icons.add, size: 20),
                   visualDensity: VisualDensity.compact,
-                  tooltip: 'Добавить блюдо',
+                  tooltip: l10n.addDish,
                   onPressed: () => _pickAndShowDishResult(
                       context, ref, mealTypeOption.id),
                 ),
@@ -990,6 +996,7 @@ class _DiaryEntryTile extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final l10n = AppLocalizations.of(context)!;
     final theme = Theme.of(context);
     final calories = entry.calories?.toInt();
     final hasProtein = (entry.proteinG ?? 0) > 0;
@@ -1016,7 +1023,7 @@ class _DiaryEntryTile extends StatelessWidget {
         children: [
           if (calories != null)
             Text(
-              '$calories ккал',
+              '$calories ${l10n.caloriesUnit}',
               style: theme.textTheme.bodySmall?.copyWith(
                 color: theme.colorScheme.onSurfaceVariant,
               ),
@@ -1095,6 +1102,7 @@ class _TodayJobsWidget extends ConsumerWidget {
 
   @override
   Widget build(BuildContext context, WidgetRef ref) {
+    final l10n = AppLocalizations.of(context)!;
     final theme = Theme.of(context);
     final visibleJobs = jobs.take(3).toList();
     final hasMore = jobs.length > 3;
@@ -1104,7 +1112,7 @@ class _TodayJobsWidget extends ConsumerWidget {
       children: [
         Row(
           children: [
-            Text('Распознавания', style: theme.textTheme.titleSmall),
+            Text(l10n.dishRecognition, style: theme.textTheme.titleSmall),
             const Spacer(),
             if (hasMore)
               TextButton(
@@ -1114,7 +1122,7 @@ class _TodayJobsWidget extends ConsumerWidget {
                   padding: const EdgeInsets.symmetric(horizontal: 8),
                 ),
                 child: Text(
-                  'Все',
+                  l10n.all,
                   style: theme.textTheme.labelMedium?.copyWith(
                     color: theme.colorScheme.primary,
                   ),
@@ -1139,6 +1147,7 @@ class _JobTile extends ConsumerWidget {
 
   @override
   Widget build(BuildContext context, WidgetRef ref) {
+    final l10n = AppLocalizations.of(context)!;
     final theme = Theme.of(context);
 
     final isDone = job.status == 'done';
@@ -1162,13 +1171,13 @@ class _JobTile extends ConsumerWidget {
     final dishName = job.result?.candidates.isNotEmpty == true
         ? job.result!.best.dishName
         : null;
-    final subtitle = dishName ?? (isFailed ? (job.error ?? 'Ошибка') : 'Обрабатывается…');
+    final subtitle = dishName ?? (isFailed ? (job.error ?? l10n.recognitionError) : l10n.recognizing);
 
     return Card(
       child: ListTile(
         leading: Icon(statusIcon, color: statusColor),
         title: Text(
-          dishName ?? (isProcessing ? 'Распознаётся…' : 'Ошибка'),
+          dishName ?? (isProcessing ? l10n.recognizing : l10n.recognitionError),
           style: theme.textTheme.bodyMedium,
         ),
         subtitle: Text(
@@ -1193,6 +1202,8 @@ class _JobTile extends ConsumerWidget {
                     dish: job.result!,
                     preselectedMealType: job.targetMealType,
                     jobId: job.id,
+                    targetDate: job.targetDate,
+                    createdAt: job.createdAt,
                     onAdded: () => Navigator.pop(sheetContext),
                   ),
                 );
@@ -1210,12 +1221,13 @@ class _QuickActionsRow extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final l10n = AppLocalizations.of(context)!;
     return Row(
       children: [
         Expanded(
           child: _ActionButton(
             icon: Icons.document_scanner_outlined,
-            label: 'Сканировать',
+            label: l10n.scanDish,
             onTap: () => context.push('/scan'),
           ),
         ),
@@ -1223,7 +1235,7 @@ class _QuickActionsRow extends StatelessWidget {
         Expanded(
           child: _ActionButton(
             icon: Icons.calendar_month_outlined,
-            label: 'Меню',
+            label: l10n.menu,
             onTap: () => context.push('/menu'),
           ),
         ),
@@ -1231,7 +1243,7 @@ class _QuickActionsRow extends StatelessWidget {
         Expanded(
           child: _ActionButton(
             icon: Icons.history,
-            label: 'История',
+            label: l10n.dishHistory,
             onTap: () => context.push('/scan/history'),
           ),
         ),
@@ -1309,6 +1321,7 @@ class _RecipeCard extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final l10n = AppLocalizations.of(context)!;
     final theme = Theme.of(context);
 
     return SizedBox(
@@ -1343,7 +1356,7 @@ class _RecipeCard extends StatelessWidget {
                 Padding(
                   padding: const EdgeInsets.fromLTRB(8, 0, 8, 6),
                   child: Text(
-                    '≈${recipe.calories!.toInt()} ккал',
+                    '≈${recipe.calories!.toInt()} ${l10n.caloriesUnit}',
                     style: theme.textTheme.labelSmall?.copyWith(
                         color: theme.colorScheme.onSurfaceVariant),
                   ),