fix: unify date limits, fix ISO week calculation, refactor home screen plan button

- Fix _isoWeek: correct Sunday shift (-3 instead of +4), use floor+1 formula,
  match jan1 timezone to input — planned meals now appear correctly for UTC+ users
- Add kPlanningHorizonDays=28 / kMenuPastWeeks=8 constants; apply to home date
  strip, plan picker (strip + calendar), and menu screen prev/next navigation
- Menu screen week nav: disable arrows at min/max limits using compareTo
- Home screen: replace _GenerateActionCard/_WeekPlannedChip conditional with
  always-visible _FutureDayPlanButton(dateString); show _DayPlannedChip only
  when the specific day has planned meals; remove standalone _PlanMenuButton
- _FutureDayPlanButton uses selected date as defaultStart instead of lastPlanned+1
- Rename weekPlannedLabel -> dayPlannedLabel across all 12 locales

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

client/lib/features/home/home_screen.dart

@@ -12,6 +12,7 @@ import '../../core/storage/local_preferences_provider.dart';
 import '../../core/theme/app_colors.dart';
 import '../../shared/models/diary_entry.dart';
 import '../../shared/models/home_summary.dart';
+import '../../shared/constants/date_limits.dart';
 import '../../shared/models/meal_type.dart';
 import '../../shared/models/menu.dart';
 import '../diary/food_search_sheet.dart';
@@ -128,8 +129,6 @@ class HomeScreen extends ConsumerWidget {
                   ],
                   const SizedBox(height: 16),
                   _QuickActionsRow(),
-                  const SizedBox(height: 8),
-                  _PlanMenuButton(),
                   if (!isFutureDate && recommendations.isNotEmpty) ...[
                     const SizedBox(height: 20),
                     _SectionTitle(l10n.recommendCook),
@@ -191,10 +190,10 @@ class _DateSelector extends StatefulWidget {
 }
 
 class _DateSelectorState extends State<_DateSelector> {
-  // Strip covers 7 future days + today + 364 past days = 372 items total.
+  // Strip covers kPlanningHorizonDays future days + today + 364 past days.
   // With reverse: true, index 0 is rendered at the RIGHT edge (newest).
-  // index 0 = today + 7, index 7 = today, index 371 = today - 364.
+  // index 0 = today + kPlanningHorizonDays, index kPlanningHorizonDays = today.
-  static const _futureDays = 7;
+  static const _futureDays = kPlanningHorizonDays;
   static const _pastDays = 364;
   static const _totalDays = _futureDays + 1 + _pastDays; // 372
   static const _pillWidth = 48.0;
@@ -1156,125 +1155,26 @@ class _FutureDayHeader extends ConsumerWidget {
   @override
   Widget build(BuildContext context, WidgetRef ref) {
     final l10n = AppLocalizations.of(context)!;
-    final date = DateTime.parse(dateString);
+    final plannedMeals = ref.watch(plannedMealsProvider(dateString));
-    final weekString = isoWeekString(date);
-    final menuState = ref.watch(menuProvider(weekString));
 
     return Column(
       crossAxisAlignment: CrossAxisAlignment.stretch,
       children: [
         _PlanningBanner(dateString: dateString),
         const SizedBox(height: 8),
-        menuState.when(
+        _FutureDayPlanButton(dateString: dateString),
-          loading: () => _GenerateLoadingCard(l10n: l10n),
+        if (plannedMeals.isNotEmpty) ...[
-          error: (_, __) => _GenerateActionCard(
+          const SizedBox(height: 8),
-            l10n: l10n,
+          _DayPlannedChip(l10n: l10n),
-            onGenerate: () =>
+        ],
-                ref.read(menuProvider(weekString).notifier).generate(),
-          ),
-          data: (plan) => plan == null
-              ? _GenerateActionCard(
-                  l10n: l10n,
-                  onGenerate: () =>
-                      ref.read(menuProvider(weekString).notifier).generate(),
-                )
-              : _WeekPlannedChip(l10n: l10n),
-        ),
       ],
     );
   }
 }
 
-class _GenerateActionCard extends StatelessWidget {
+class _DayPlannedChip extends StatelessWidget {
   final AppLocalizations l10n;
-  final VoidCallback onGenerate;
+  const _DayPlannedChip({required this.l10n});
-  const _GenerateActionCard({required this.l10n, required this.onGenerate});
-
-  @override
-  Widget build(BuildContext context) {
-    final theme = Theme.of(context);
-    return Container(
-      padding: const EdgeInsets.all(16),
-      decoration: BoxDecoration(
-        color: theme.colorScheme.surfaceContainerLow,
-        borderRadius: BorderRadius.circular(12),
-      ),
-      child: Column(
-        crossAxisAlignment: CrossAxisAlignment.start,
-        children: [
-          Row(
-            children: [
-              Icon(Icons.auto_awesome,
-                  color: theme.colorScheme.primary, size: 20),
-              const SizedBox(width: 8),
-              Expanded(
-                child: Text(
-                  l10n.generateWeekLabel,
-                  style: theme.textTheme.titleSmall?.copyWith(
-                    color: theme.colorScheme.onSurface,
-                    fontWeight: FontWeight.w600,
-                  ),
-                ),
-              ),
-            ],
-          ),
-          const SizedBox(height: 4),
-          Text(
-            l10n.generateWeekSubtitle,
-            style: theme.textTheme.bodySmall?.copyWith(
-              color: theme.colorScheme.onSurfaceVariant,
-            ),
-          ),
-          const SizedBox(height: 12),
-          FilledButton(
-            onPressed: onGenerate,
-            child: Text(l10n.generateWeekLabel),
-          ),
-        ],
-      ),
-    );
-  }
-}
-
-class _GenerateLoadingCard extends StatelessWidget {
-  final AppLocalizations l10n;
-  const _GenerateLoadingCard({required this.l10n});
-
-  @override
-  Widget build(BuildContext context) {
-    final theme = Theme.of(context);
-    return Container(
-      padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 14),
-      decoration: BoxDecoration(
-        color: theme.colorScheme.surfaceContainerLow,
-        borderRadius: BorderRadius.circular(12),
-      ),
-      child: Row(
-        children: [
-          SizedBox(
-            width: 18,
-            height: 18,
-            child: CircularProgressIndicator.adaptive(
-              strokeWidth: 2,
-              valueColor: AlwaysStoppedAnimation(theme.colorScheme.primary),
-            ),
-          ),
-          const SizedBox(width: 12),
-          Text(
-            l10n.generatingMenu,
-            style: theme.textTheme.bodyMedium?.copyWith(
-              color: theme.colorScheme.onSurfaceVariant,
-            ),
-          ),
-        ],
-      ),
-    );
-  }
-}
-
-class _WeekPlannedChip extends StatelessWidget {
-  final AppLocalizations l10n;
-  const _WeekPlannedChip({required this.l10n});
 
   @override
   Widget build(BuildContext context) {
@@ -1292,7 +1192,7 @@ class _WeekPlannedChip extends StatelessWidget {
               color: theme.colorScheme.onSecondaryContainer, size: 18),
           const SizedBox(width: 8),
           Text(
-            l10n.weekPlannedLabel,
+            l10n.dayPlannedLabel,
             style: theme.textTheme.bodySmall?.copyWith(
               color: theme.colorScheme.onSecondaryContainer,
               fontWeight: FontWeight.w600,
@@ -1647,8 +1547,9 @@ class _ActionButton extends StatelessWidget {
 
 // ── Plan menu button ──────────────────────────────────────────
 
-class _PlanMenuButton extends ConsumerWidget {
+class _FutureDayPlanButton extends ConsumerWidget {
-  const _PlanMenuButton();
+  final String dateString;
+  const _FutureDayPlanButton({required this.dateString});
 
   @override
   Widget build(BuildContext context, WidgetRef ref) {
@@ -1682,16 +1583,13 @@ class _PlanMenuButton extends ConsumerWidget {
   }
 
   void _openPlanSheet(BuildContext context, WidgetRef ref) {
+    final defaultStart = DateTime.parse(dateString);
     showModalBottomSheet<void>(
       context: context,
       isScrollControlled: true,
       useSafeArea: true,
       builder: (_) => PlanMenuSheet(
         onModeSelected: (mode) {
-          final lastPlanned = ref.read(lastPlannedDateProvider);
-          final defaultStart = lastPlanned != null
-              ? lastPlanned.add(const Duration(days: 1))
-              : DateTime.now().add(const Duration(days: 1));
           showModalBottomSheet<void>(
             context: context,
             isScrollControlled: true,

client/lib/features/menu/menu_provider.dart

@@ -16,22 +16,27 @@ final menuServiceProvider = Provider<MenuService>((ref) {
 
 /// The ISO week string for the currently displayed week, e.g. "2026-W08".
 final currentWeekProvider = StateProvider<String>((ref) {
-  final now = DateTime.now().toUtc();
+  final now = DateTime.now();
   final (y, w) = _isoWeek(now);
   return '$y-W${w.toString().padLeft(2, '0')}';
 });
 
 (int year, int week) _isoWeek(DateTime dt) {
-  // Shift to Thursday to get ISO week year.
+  // Shift to Thursday of the same ISO week.
-  final thu = dt.add(Duration(days: 4 - (dt.weekday == 7 ? 0 : dt.weekday)));
+  // Monday=1…Saturday=6 → add (4 - weekday) days; Sunday=7 → subtract 3 days.
-  final jan1 = DateTime.utc(thu.year, 1, 1);
+  final int shift = dt.weekday == 7 ? -3 : 4 - dt.weekday;
-  final week = ((thu.difference(jan1).inDays) / 7).ceil();
+  final thu = dt.add(Duration(days: shift));
+  // Use the same timezone as the input to avoid offset drift on the difference.
+  final jan1 = dt.isUtc
+      ? DateTime.utc(thu.year, 1, 1)
+      : DateTime(thu.year, 1, 1);
+  final week = (thu.difference(jan1).inDays ~/ 7) + 1;
   return (thu.year, week);
 }
 
 /// Returns the ISO 8601 week string for [date], e.g. "2026-W12".
 String isoWeekString(DateTime date) {
-  final (year, week) = _isoWeek(date.toUtc());
+  final (year, week) = _isoWeek(date);
   return '$year-W${week.toString().padLeft(2, '0')}';
 }
 

client/lib/features/menu/menu_screen.dart

@@ -3,6 +3,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:go_router/go_router.dart';
 
+import '../../shared/constants/date_limits.dart';
 import '../../shared/models/menu.dart';
 import 'menu_provider.dart';
 
@@ -95,31 +96,48 @@ class _WeekNavBar extends StatelessWidget implements PreferredSizeWidget {
   }
 
   (int, int) _isoWeekOf(DateTime dt) {
-    final thu = dt.add(Duration(days: 4 - (dt.weekday == 7 ? 0 : dt.weekday)));
+    final int shift = dt.weekday == 7 ? -3 : 4 - dt.weekday;
-    final jan1 = DateTime.utc(thu.year, 1, 1);
+    final thu = dt.add(Duration(days: shift));
-    final w = ((thu.difference(jan1).inDays) / 7).ceil();
+    final jan1 = dt.isUtc
+        ? DateTime.utc(thu.year, 1, 1)
+        : DateTime(thu.year, 1, 1);
+    final w = (thu.difference(jan1).inDays ~/ 7) + 1;
     return (thu.year, w);
   }
 
+  String _currentWeekString(DateTime date) {
+    final (y, w) = _isoWeekOf(date);
+    return '$y-W${w.toString().padLeft(2, '0')}';
+  }
+
   @override
   Widget build(BuildContext context) {
+    final now = DateTime.now();
+    final maxWeek = _currentWeekString(
+        now.add(const Duration(days: kPlanningHorizonDays)));
+    final minWeek = _currentWeekString(
+        now.subtract(Duration(days: kMenuPastWeeks * 7)));
     return Row(
       mainAxisAlignment: MainAxisAlignment.center,
       children: [
         IconButton(
           icon: const Icon(Icons.chevron_left),
-          onPressed: () {
+          onPressed: week.compareTo(minWeek) <= 0
-            ref.read(currentWeekProvider.notifier).state =
+              ? null
-                _offsetWeek(week, -1);
+              : () {
-          },
+                  ref.read(currentWeekProvider.notifier).state =
+                      _offsetWeek(week, -1);
+                },
         ),
         Text(_weekLabel(week), style: Theme.of(context).textTheme.bodyMedium),
         IconButton(
           icon: const Icon(Icons.chevron_right),
-          onPressed: () {
+          onPressed: week.compareTo(maxWeek) >= 0
-            ref.read(currentWeekProvider.notifier).state =
+              ? null
-                _offsetWeek(week, 1);
+              : () {
-          },
+                  ref.read(currentWeekProvider.notifier).state =
+                      _offsetWeek(week, 1);
+                },
         ),
       ],
     );

client/lib/features/menu/plan_date_picker_sheet.dart

@@ -3,6 +3,7 @@ import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:food_ai/l10n/app_localizations.dart';
 import 'package:intl/intl.dart';
 
+import '../../shared/constants/date_limits.dart';
 import '../../shared/models/meal_type.dart';
 import '../profile/profile_provider.dart';
 import 'menu_provider.dart';
@@ -279,8 +280,8 @@ class _DateStripSelector extends StatefulWidget {
 
 class _DateStripSelectorState extends State<_DateStripSelector> {
   late final ScrollController _scrollController;
-  // Show 30 upcoming days (today excluded, starts tomorrow).
+  // Show upcoming days up to the planning horizon (today excluded, starts tomorrow).
-  static const _futureDays = 30;
+  static const _futureDays = kPlanningHorizonDays;
   static const _itemWidth = 64.0;
 
   DateTime get _tomorrow =>
@@ -407,12 +408,22 @@ class _CalendarRangePickerState extends State<_CalendarRangePicker> {
   }
 
   void _nextMonth() {
+    final horizon = DateTime.now().add(const Duration(days: kPlanningHorizonDays));
+    final limitMonth = DateTime(horizon.year, horizon.month);
+    if (!DateTime(_displayMonth.year, _displayMonth.month).isBefore(limitMonth)) return;
     setState(() {
       _displayMonth =
           DateTime(_displayMonth.year, _displayMonth.month + 1);
     });
   }
 
+  bool _isBeyondHorizon(DateTime date) {
+    final today = DateTime.now();
+    final horizon = DateTime(today.year, today.month, today.day)
+        .add(const Duration(days: kPlanningHorizonDays));
+    return date.isAfter(horizon);
+  }
+
   bool _isInRange(DateTime date) {
     final dayOnly = DateTime(date.year, date.month, date.day);
     final start =
@@ -510,11 +521,13 @@ class _CalendarRangePickerState extends State<_CalendarRangePicker> {
             final isStart = _isRangeStart(date);
             final isEnd = _isRangeEnd(date);
             final isPast = _isPast(date);
+            final isBeyond = _isBeyondHorizon(date);
+            final isDisabled = isPast || isBeyond;
 
             Color bgColor = Colors.transparent;
             Color textColor = theme.colorScheme.onSurface;
 
-            if (isPast) {
+            if (isDisabled) {
               // ignore: deprecated_member_use
               textColor = theme.colorScheme.onSurface.withOpacity(0.3);
             } else if (isStart || isEnd) {
@@ -526,7 +539,7 @@ class _CalendarRangePickerState extends State<_CalendarRangePicker> {
             }
 
             return GestureDetector(
-              onTap: isPast ? null : () => widget.onDayTapped(date),
+              onTap: isDisabled ? null : () => widget.onDayTapped(date),
               child: Container(
                 decoration: BoxDecoration(
                   color: bgColor,

client/lib/l10n/app_ar.arb

@@ -135,7 +135,7 @@
   "generateWeekLabel": "تخطيط الأسبوع",
   "generateWeekSubtitle": "سيقوم الذكاء الاصطناعي بإنشاء قائمة طعام تشمل الإفطار والغداء والعشاء لكامل الأسبوع",
   "generatingMenu": "جارٍ إنشاء القائمة...",
-  "weekPlannedLabel": "تم تخطيط الأسبوع",
+  "dayPlannedLabel": "تم تخطيط اليوم",
 
   "planMenuButton": "تخطيط الوجبات",
   "planMenuTitle": "ماذا تريد تخطيطه؟",

client/lib/l10n/app_de.arb

@@ -135,7 +135,7 @@
   "generateWeekLabel": "Woche planen",
   "generateWeekSubtitle": "KI erstellt einen Menüplan mit Frühstück, Mittagessen und Abendessen für die ganze Woche",
   "generatingMenu": "Menü wird erstellt...",
-  "weekPlannedLabel": "Woche geplant",
+  "dayPlannedLabel": "Tag geplant",
 
   "planMenuButton": "Mahlzeiten planen",
   "planMenuTitle": "Was planen?",

client/lib/l10n/app_en.arb

@@ -133,7 +133,7 @@
   "generateWeekLabel": "Plan the week",
   "generateWeekSubtitle": "AI will create a menu with breakfast, lunch and dinner for the whole week",
   "generatingMenu": "Generating menu...",
-  "weekPlannedLabel": "Week planned",
+  "dayPlannedLabel": "Day planned",
 
   "planMenuButton": "Plan meals",
   "planMenuTitle": "What to plan?",

client/lib/l10n/app_es.arb

@@ -135,7 +135,7 @@
   "generateWeekLabel": "Planificar la semana",
   "generateWeekSubtitle": "La IA creará un menú con desayuno, comida y cena para toda la semana",
   "generatingMenu": "Generando menú...",
-  "weekPlannedLabel": "Semana planificada",
+  "dayPlannedLabel": "Día planificado",
 
   "planMenuButton": "Planificar comidas",
   "planMenuTitle": "¿Qué planificar?",

client/lib/l10n/app_fr.arb

@@ -135,7 +135,7 @@
   "generateWeekLabel": "Planifier la semaine",
   "generateWeekSubtitle": "L'IA créera un menu avec petit-déjeuner, déjeuner et dîner pour toute la semaine",
   "generatingMenu": "Génération du menu...",
-  "weekPlannedLabel": "Semaine planifiée",
+  "dayPlannedLabel": "Jour planifié",
 
   "planMenuButton": "Planifier les repas",
   "planMenuTitle": "Que planifier ?",

client/lib/l10n/app_hi.arb

@@ -135,7 +135,7 @@
   "generateWeekLabel": "सप्ताह की योजना बनाएं",
   "generateWeekSubtitle": "AI पूरे सप्ताह के लिए नाश्ता, दोपहर का खाना और रात के खाने के साथ मेनू बनाएगा",
   "generatingMenu": "मेनू बना रहे हैं...",
-  "weekPlannedLabel": "सप्ताह की योजना बनाई गई",
+  "dayPlannedLabel": "दिन की योजना बनाई गई",
 
   "planMenuButton": "भोजन की योजना बनाएं",
   "planMenuTitle": "क्या योजना बनानी है?",

client/lib/l10n/app_it.arb

@@ -135,7 +135,7 @@
   "generateWeekLabel": "Pianifica la settimana",
   "generateWeekSubtitle": "L'AI creerà un menu con colazione, pranzo e cena per tutta la settimana",
   "generatingMenu": "Generazione menu...",
-  "weekPlannedLabel": "Settimana pianificata",
+  "dayPlannedLabel": "Giorno pianificato",
 
   "planMenuButton": "Pianifica i pasti",
   "planMenuTitle": "Cosa pianificare?",

client/lib/l10n/app_ja.arb

@@ -135,7 +135,7 @@
   "generateWeekLabel": "週を計画する",
   "generateWeekSubtitle": "AIが一週間の朝食・昼食・夕食のメニューを作成します",
   "generatingMenu": "メニューを生成中...",
-  "weekPlannedLabel": "週の計画済み",
+  "dayPlannedLabel": "日の計画済み",
 
   "planMenuButton": "食事を計画する",
   "planMenuTitle": "何を計画する？",

client/lib/l10n/app_ko.arb

@@ -135,7 +135,7 @@
   "generateWeekLabel": "주간 계획하기",
   "generateWeekSubtitle": "AI가 한 주 동안 아침, 점심, 저녁 식사 메뉴를 만들어 드립니다",
   "generatingMenu": "메뉴 생성 중...",
-  "weekPlannedLabel": "주간 계획 완료",
+  "dayPlannedLabel": "일일 계획 완료",
 
   "planMenuButton": "식사 계획하기",
   "planMenuTitle": "무엇을 계획하시겠어요?",

client/lib/l10n/app_localizations.dart

@@ -826,11 +826,11 @@ abstract class AppLocalizations {
   /// **'Generating menu...'**
   String get generatingMenu;
 
-  /// No description provided for @weekPlannedLabel.
+  /// No description provided for @dayPlannedLabel.
   ///
   /// In en, this message translates to:
-  /// **'Week planned'**
+  /// **'Day planned'**
-  String get weekPlannedLabel;
+  String get dayPlannedLabel;
 
   /// No description provided for @planMenuButton.
   ///

client/lib/l10n/app_localizations_ar.dart

@@ -371,7 +371,7 @@ class AppLocalizationsAr extends AppLocalizations {
   String get generatingMenu => 'جارٍ إنشاء القائمة...';
 
   @override
-  String get weekPlannedLabel => 'تم تخطيط الأسبوع';
+  String get dayPlannedLabel => 'تم تخطيط اليوم';
 
   @override
   String get planMenuButton => 'تخطيط الوجبات';

client/lib/l10n/app_localizations_de.dart

@@ -373,7 +373,7 @@ class AppLocalizationsDe extends AppLocalizations {
   String get generatingMenu => 'Menü wird erstellt...';
 
   @override
-  String get weekPlannedLabel => 'Woche geplant';
+  String get dayPlannedLabel => 'Tag geplant';
 
   @override
   String get planMenuButton => 'Mahlzeiten planen';

client/lib/l10n/app_localizations_en.dart

@@ -371,7 +371,7 @@ class AppLocalizationsEn extends AppLocalizations {
   String get generatingMenu => 'Generating menu...';
 
   @override
-  String get weekPlannedLabel => 'Week planned';
+  String get dayPlannedLabel => 'Day planned';
 
   @override
   String get planMenuButton => 'Plan meals';

client/lib/l10n/app_localizations_es.dart

@@ -373,7 +373,7 @@ class AppLocalizationsEs extends AppLocalizations {
   String get generatingMenu => 'Generando menú...';
 
   @override
-  String get weekPlannedLabel => 'Semana planificada';
+  String get dayPlannedLabel => 'Día planificado';
 
   @override
   String get planMenuButton => 'Planificar comidas';

client/lib/l10n/app_localizations_fr.dart

@@ -374,7 +374,7 @@ class AppLocalizationsFr extends AppLocalizations {
   String get generatingMenu => 'Génération du menu...';
 
   @override
-  String get weekPlannedLabel => 'Semaine planifiée';
+  String get dayPlannedLabel => 'Jour planifié';
 
   @override
   String get planMenuButton => 'Planifier les repas';

client/lib/l10n/app_localizations_hi.dart

@@ -372,7 +372,7 @@ class AppLocalizationsHi extends AppLocalizations {
   String get generatingMenu => 'मेनू बना रहे हैं...';
 
   @override
-  String get weekPlannedLabel => 'सप्ताह की योजना बनाई गई';
+  String get dayPlannedLabel => 'दिन की योजना बनाई गई';
 
   @override
   String get planMenuButton => 'भोजन की योजना बनाएं';

client/lib/l10n/app_localizations_it.dart

@@ -373,7 +373,7 @@ class AppLocalizationsIt extends AppLocalizations {
   String get generatingMenu => 'Generazione menu...';
 
   @override
-  String get weekPlannedLabel => 'Settimana pianificata';
+  String get dayPlannedLabel => 'Giorno pianificato';
 
   @override
   String get planMenuButton => 'Pianifica i pasti';

client/lib/l10n/app_localizations_ja.dart

@@ -369,7 +369,7 @@ class AppLocalizationsJa extends AppLocalizations {
   String get generatingMenu => 'メニューを生成中...';
 
   @override
-  String get weekPlannedLabel => '週の計画済み';
+  String get dayPlannedLabel => '日の計画済み';
 
   @override
   String get planMenuButton => '食事を計画する';

client/lib/l10n/app_localizations_ko.dart

@@ -369,7 +369,7 @@ class AppLocalizationsKo extends AppLocalizations {
   String get generatingMenu => '메뉴 생성 중...';
 
   @override
-  String get weekPlannedLabel => '주간 계획 완료';
+  String get dayPlannedLabel => '일일 계획 완료';
 
   @override
   String get planMenuButton => '식사 계획하기';

client/lib/l10n/app_localizations_pt.dart

@@ -373,7 +373,7 @@ class AppLocalizationsPt extends AppLocalizations {
   String get generatingMenu => 'Gerando menu...';
 
   @override
-  String get weekPlannedLabel => 'Semana planejada';
+  String get dayPlannedLabel => 'Dia planejado';
 
   @override
   String get planMenuButton => 'Planejar refeições';

client/lib/l10n/app_localizations_ru.dart

@@ -371,7 +371,7 @@ class AppLocalizationsRu extends AppLocalizations {
   String get generatingMenu => 'Генерируем меню...';
 
   @override
-  String get weekPlannedLabel => 'Неделя запланирована';
+  String get dayPlannedLabel => 'День запланирован';
 
   @override
   String get planMenuButton => 'Спланировать меню';

client/lib/l10n/app_localizations_zh.dart

@@ -369,7 +369,7 @@ class AppLocalizationsZh extends AppLocalizations {
   String get generatingMenu => '正在生成菜单...';
 
   @override
-  String get weekPlannedLabel => '本周已规划';
+  String get dayPlannedLabel => '今日已规划';
 
   @override
   String get planMenuButton => '规划餐食';

client/lib/l10n/app_pt.arb

@@ -135,7 +135,7 @@
   "generateWeekLabel": "Planejar a semana",
   "generateWeekSubtitle": "A IA criará um menu com café da manhã, almoço e jantar para a semana inteira",
   "generatingMenu": "Gerando menu...",
-  "weekPlannedLabel": "Semana planejada",
+  "dayPlannedLabel": "Dia planejado",
 
   "planMenuButton": "Planejar refeições",
   "planMenuTitle": "O que planejar?",

client/lib/l10n/app_ru.arb

@@ -133,7 +133,7 @@
   "generateWeekLabel": "Запланировать неделю",
   "generateWeekSubtitle": "AI составит меню с завтраком, обедом и ужином на всю неделю",
   "generatingMenu": "Генерируем меню...",
-  "weekPlannedLabel": "Неделя запланирована",
+  "dayPlannedLabel": "День запланирован",
 
   "planMenuButton": "Спланировать меню",
   "planMenuTitle": "Что запланировать?",

client/lib/l10n/app_zh.arb

@@ -135,7 +135,7 @@
   "generateWeekLabel": "规划本周",
   "generateWeekSubtitle": "AI将为整周创建含早餐、午餐和晚餐的菜单",
   "generatingMenu": "正在生成菜单...",
-  "weekPlannedLabel": "本周已规划",
+  "dayPlannedLabel": "今日已规划",
 
   "planMenuButton": "规划餐食",
   "planMenuTitle": "规划什么？",

client/lib/shared/constants/date_limits.dart

@@ -0,0 +1,5 @@
+/// How many days into the future the app allows planning and browsing.
+const int kPlanningHorizonDays = 28;
+
+/// How many weeks into the past the menu screen allows backward navigation.
+const int kMenuPastWeeks = 8;