feat: redesign home screen date selector with navigation controls

Replace static 7-day ListView with a scrollable strip (365 days back,
today at the right edge) and a header row with:
- chevron buttons to step one day at a time
- selected date label ("Вт, 18 марта")
- "Сегодня" shortcut that appears when a past date is selected

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

client/lib/features/home/home_screen.dart

@@ -135,7 +135,7 @@ class _AppBar extends StatelessWidget {
 
 // ── Date selector ─────────────────────────────────────────────
 
-class _DateSelector extends StatelessWidget {
+class _DateSelector extends StatefulWidget {
   final DateTime selectedDate;
   final ValueChanged<DateTime> onDateSelected;
 
@@ -144,7 +144,101 @@ class _DateSelector extends StatelessWidget {
     required this.onDateSelected,
   });
 
+  @override
+  State<_DateSelector> createState() => _DateSelectorState();
+}
+
+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;
+  static const _pillSpacing = 6.0;
+
+  late final ScrollController _scrollController;
+
+  String _formatSelectedDate(DateTime date) {
+    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';
+  }
+
+  // Index in the reversed list: 0 = today, 1 = yesterday, …
+  int _indexForDate(DateTime date) {
+    final today = DateTime.now();
+    final todayNormalized = DateTime(today.year, today.month, today.day);
+    final dateNormalized = DateTime(date.year, date.month, date.day);
+    return todayNormalized.difference(dateNormalized).inDays.clamp(0, _totalDays - 1);
+  }
+
+  double _offsetForIndex(int index) => index * (_pillWidth + _pillSpacing);
+
+  void _selectPreviousDay() {
+    final previousDay = widget.selectedDate.subtract(const Duration(days: 1));
+    final previousDayNormalized =
+        DateTime(previousDay.year, previousDay.month, previousDay.day);
+    final today = DateTime.now();
+    final oldestAllowed = DateTime(today.year, today.month, today.day)
+        .subtract(const Duration(days: _totalDays - 1));
+    if (!previousDayNormalized.isBefore(oldestAllowed)) {
+      widget.onDateSelected(previousDayNormalized);
+    }
+  }
+
+  void _selectNextDay() {
+    final today = DateTime.now();
+    final todayNormalized = DateTime(today.year, today.month, today.day);
+    final nextDay = widget.selectedDate.add(const Duration(days: 1));
+    final nextDayNormalized =
+        DateTime(nextDay.year, nextDay.month, nextDay.day);
+    if (!nextDayNormalized.isAfter(todayNormalized)) {
+      widget.onDateSelected(nextDayNormalized);
+    }
+  }
+
+  void _jumpToToday() {
+    final today = DateTime.now();
+    widget.onDateSelected(DateTime(today.year, today.month, today.day));
+    if (_scrollController.hasClients) {
+      _scrollController.animateTo(
+        0,
+        duration: const Duration(milliseconds: 300),
+        curve: Curves.easeInOut,
+      );
+    }
+  }
+
+  @override
+  void initState() {
+    super.initState();
+    _scrollController = ScrollController();
+  }
+
+  @override
+  void didUpdateWidget(_DateSelector oldWidget) {
+    super.didUpdateWidget(oldWidget);
+    final oldIndex = _indexForDate(oldWidget.selectedDate);
+    final newIndex = _indexForDate(widget.selectedDate);
+    if (oldIndex != newIndex && _scrollController.hasClients) {
+      _scrollController.animateTo(
+        _offsetForIndex(newIndex),
+        duration: const Duration(milliseconds: 300),
+        curve: Curves.easeInOut,
+      );
+    }
+  }
+
+  @override
+  void dispose() {
+    _scrollController.dispose();
+    super.dispose();
+  }
 
   @override
   Widget build(BuildContext context) {
@@ -152,60 +246,114 @@ class _DateSelector extends StatelessWidget {
     final today = DateTime.now();
     final todayNormalized = DateTime(today.year, today.month, today.day);
     final selectedNormalized = DateTime(
-        selectedDate.year, selectedDate.month, selectedDate.day);
+        widget.selectedDate.year, widget.selectedDate.month, widget.selectedDate.day);
+    final isToday = selectedNormalized == todayNormalized;
 
-    return SizedBox(
-      height: 64,
-      child: ListView.separated(
-        scrollDirection: Axis.horizontal,
-        itemCount: 7,
-        separatorBuilder: (_, __) => const SizedBox(width: 8),
-        itemBuilder: (context, index) {
-          final date = todayNormalized.subtract(Duration(days: 6 - index));
-          final isSelected = date == selectedNormalized;
-          final isToday = date == todayNormalized;
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.start,
+      children: [
+        // ── Header row ──────────────────────────────────────────
+        SizedBox(
+          height: 36,
+          child: Row(
+            children: [
+              IconButton(
+                icon: const Icon(Icons.chevron_left),
+                iconSize: 20,
+                visualDensity: VisualDensity.compact,
+                onPressed: _selectPreviousDay,
+              ),
+              Expanded(
+                child: Text(
+                  _formatSelectedDate(widget.selectedDate),
+                  style: theme.textTheme.labelMedium
+                      ?.copyWith(fontWeight: FontWeight.w600),
+                  textAlign: TextAlign.center,
+                ),
+              ),
+              if (!isToday)
+                TextButton(
+                  onPressed: _jumpToToday,
+                  style: TextButton.styleFrom(
+                    visualDensity: VisualDensity.compact,
+                    padding: const EdgeInsets.symmetric(horizontal: 8),
+                  ),
+                  child: Text(
+                    'Сегодня',
+                    style: theme.textTheme.labelMedium
+                        ?.copyWith(color: theme.colorScheme.primary),
+                  ),
+                )
+              else
+                IconButton(
+                  icon: const Icon(Icons.chevron_right),
+                  iconSize: 20,
+                  visualDensity: VisualDensity.compact,
+                  onPressed: null,
+                ),
+            ],
+          ),
+        ),
+        const SizedBox(height: 8),
+        // ── Day strip ────────────────────────────────────────────
+        SizedBox(
+          height: 56,
+          // reverse: true → index 0 (today) sits at the right edge
+          child: ListView.separated(
+            controller: _scrollController,
+            scrollDirection: Axis.horizontal,
+            reverse: true,
+            itemCount: _totalDays,
+            separatorBuilder: (_, __) => const SizedBox(width: _pillSpacing),
+            itemBuilder: (listContext, index) {
+              final date = todayNormalized.subtract(Duration(days: index));
+              final isSelected = date == selectedNormalized;
+              final isDayToday = date == todayNormalized;
 
-          return GestureDetector(
-            onTap: () => onDateSelected(date),
-            child: AnimatedContainer(
-              duration: const Duration(milliseconds: 150),
-              width: 44,
-              decoration: BoxDecoration(
-                color: isSelected
-                    ? theme.colorScheme.primary
-                    : theme.colorScheme.surfaceContainerHighest,
-                borderRadius: BorderRadius.circular(12),
-              ),
-              child: Column(
-                mainAxisAlignment: MainAxisAlignment.center,
-                children: [
-                  Text(
-                    _weekDayShort[date.weekday - 1],
-                    style: theme.textTheme.labelSmall?.copyWith(
-                      color: isSelected
-                          ? theme.colorScheme.onPrimary
-                          : theme.colorScheme.onSurfaceVariant,
-                    ),
+              return GestureDetector(
+                onTap: () => widget.onDateSelected(date),
+                child: AnimatedContainer(
+                  duration: const Duration(milliseconds: 150),
+                  width: _pillWidth,
+                  decoration: BoxDecoration(
+                    color: isSelected
+                        ? theme.colorScheme.primary
+                        : theme.colorScheme.surfaceContainerHighest,
+                    borderRadius: BorderRadius.circular(12),
                   ),
-                  const SizedBox(height: 2),
-                  Text(
-                    '${date.day}',
-                    style: theme.textTheme.bodyMedium?.copyWith(
-                      fontWeight:
-                          isSelected || isToday ? FontWeight.w700 : FontWeight.normal,
-                      color: isSelected
-                          ? theme.colorScheme.onPrimary
-                          : isToday
-                              ? theme.colorScheme.primary
-                              : null,
-                    ),
+                  child: Column(
+                    mainAxisAlignment: MainAxisAlignment.center,
+                    children: [
+                      Text(
+                        _weekDayShort[date.weekday - 1],
+                        style: theme.textTheme.labelSmall?.copyWith(
+                          color: isSelected
+                              ? theme.colorScheme.onPrimary
+                              : theme.colorScheme.onSurfaceVariant,
+                        ),
+                      ),
+                      const SizedBox(height: 2),
+                      Text(
+                        '${date.day}',
+                        style: theme.textTheme.bodyMedium?.copyWith(
+                          fontWeight: isSelected || isDayToday
+                              ? FontWeight.w700
+                              : FontWeight.normal,
+                          color: isSelected
+                              ? theme.colorScheme.onPrimary
+                              : isDayToday
+                                  ? theme.colorScheme.primary
+                                  : null,
+                        ),
+                      ),
+                    ],
                   ),
-                ],
-              ),
-            ),
-          );
-        },
-      ),
+                ),
+              );
+            },
+          ),
+        ),
+      ],
     );
   }
 }

client/pubspec.lock

@@ -125,10 +125,10 @@ packages:
     dependency: transitive
     description:
       name: characters
-      sha256: f71061c654a3380576a52b451dd5532377954cf9dbd272a78fc8479606670803
+      sha256: faf38497bda5ead2a8c7615f4f7939df04333478bf32e4173fcb06d428b5716b
       url: "https://pub.dev"
     source: hosted
-    version: "1.4.0"
+    version: "1.4.1"
   checked_yaml:
     dependency: transitive
     description:
@@ -668,26 +668,26 @@ packages:
     dependency: transitive
     description:
       name: matcher
-      sha256: dc58c723c3c24bf8d3e2d3ad3f2f9d7bd9cf43ec6feaa64181775e60190153f2
+      sha256: dc0b7dc7651697ea4ff3e69ef44b0407ea32c487a39fff6a4004fa585e901861
       url: "https://pub.dev"
     source: hosted
-    version: "0.12.17"
+    version: "0.12.19"
   material_color_utilities:
     dependency: transitive
     description:
       name: material_color_utilities
-      sha256: f7142bb1154231d7ea5f96bc7bde4bda2a0945d2806bb11670e30b850d56bdec
+      sha256: "9c337007e82b1889149c82ed242ed1cb24a66044e30979c44912381e9be4c48b"
       url: "https://pub.dev"
     source: hosted
-    version: "0.11.1"
+    version: "0.13.0"
   meta:
     dependency: transitive
     description:
       name: meta
-      sha256: e3641ec5d63ebf0d9b41bd43201a66e3fc79a65db5f61fc181f04cd27aab950c
+      sha256: "23f08335362185a5ea2ad3a4e597f1375e78bce8a040df5c600c8d3552ef2394"
       url: "https://pub.dev"
     source: hosted
-    version: "1.16.0"
+    version: "1.17.0"
   mime:
     dependency: transitive
     description:
@@ -993,10 +993,10 @@ packages:
     dependency: transitive
     description:
       name: test_api
-      sha256: "522f00f556e73044315fa4585ec3270f1808a4b186c936e612cab0b565ff1e00"
+      sha256: "8161c84903fd860b26bfdefb7963b3f0b68fee7adea0f59ef805ecca346f0c7a"
       url: "https://pub.dev"
     source: hosted
-    version: "0.7.6"
+    version: "0.7.10"
   typed_data:
     dependency: transitive
     description: