feat(meezi_app): discovery screen parity — rich filters + taxonomy (code-only)

Brings the Flutter discover screen toward web-Koja parity. Unverified (pub blocked).

- DiscoverFilters is now a copyWith class so the many optional filters set safely.
- Adds an "open now" chip, rating chips, sort, and a taxonomy-driven filter sheet
  (themes/vibes/occasions/space-features as multi-select chips + price tier),
  feeding the rich discover() query. Active-filter badge + pull-to-refresh.
- Café cards show open/closed status.

mobile/meezi_app/lib/features/discover/discover_screen.dart

@@ -1,25 +1,95 @@
 import 'package:flutter/material.dart';
+import 'package:flutter/foundation.dart' show ValueGetter;
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:go_router/go_router.dart';
 
 import '../cart/cart_state.dart';
 
-typedef DiscoverFilters = ({String? q, double? minRating, String sort});
+/// Discovery filters. A class (not a record) so the many optional filters can be
+/// changed one at a time via copyWith without re-listing every field.
+class DiscoverFilters {
+  const DiscoverFilters({
+    this.q,
+    this.minRating,
+    this.sort = 'rating',
+    this.openNow = false,
+    this.priceTier,
+    this.themes = const [],
+    this.vibes = const [],
+    this.occasions = const [],
+    this.spaceFeatures = const [],
+  });
 
-final discoverFiltersProvider = StateProvider<DiscoverFilters>(
+  final String? q;
-  (_) => (q: null, minRating: null, sort: 'rating'),
+  final double? minRating;
-);
+  final String sort;
+  final bool openNow;
+  final String? priceTier;
+  final List<String> themes;
+  final List<String> vibes;
+  final List<String> occasions;
+  final List<String> spaceFeatures;
 
-final discoverProvider = FutureProvider.autoDispose<List<Map<String, dynamic>>>((ref) {
+  int get activeCount =>
-  final filters = ref.watch(discoverFiltersProvider);
+      (minRating != null ? 1 : 0) +
+      (openNow ? 1 : 0) +
+      (priceTier != null ? 1 : 0) +
+      themes.length +
+      vibes.length +
+      occasions.length +
+      spaceFeatures.length;
+
+  DiscoverFilters copyWith({
+    ValueGetter<String?>? q,
+    ValueGetter<double?>? minRating,
+    String? sort,
+    bool? openNow,
+    ValueGetter<String?>? priceTier,
+    List<String>? themes,
+    List<String>? vibes,
+    List<String>? occasions,
+    List<String>? spaceFeatures,
+  }) {
+    return DiscoverFilters(
+      q: q != null ? q() : this.q,
+      minRating: minRating != null ? minRating() : this.minRating,
+      sort: sort ?? this.sort,
+      openNow: openNow ?? this.openNow,
+      priceTier: priceTier != null ? priceTier() : this.priceTier,
+      themes: themes ?? this.themes,
+      vibes: vibes ?? this.vibes,
+      occasions: occasions ?? this.occasions,
+      spaceFeatures: spaceFeatures ?? this.spaceFeatures,
+    );
+  }
+}
+
+final discoverFiltersProvider =
+    StateProvider<DiscoverFilters>((_) => const DiscoverFilters());
+
+final discoverProvider =
+    FutureProvider.autoDispose<List<Map<String, dynamic>>>((ref) {
+  final f = ref.watch(discoverFiltersProvider);
   return ref.watch(publicApiProvider).discover(
         city: 'تهران',
-        q: filters.q,
+        q: f.q,
-        minRating: filters.minRating,
+        minRating: f.minRating,
-        sort: filters.sort,
+        sort: f.sort,
+        openNow: f.openNow,
+        priceTier: f.priceTier,
+        themes: f.themes,
+        vibes: f.vibes,
+        occasions: f.occasions,
+        spaceFeatures: f.spaceFeatures,
       );
 });
 
+/// Available themes/vibes/occasions/spaceFeatures for the filter sheet.
+final discoverTaxonomyProvider =
+    FutureProvider.autoDispose<Map<String, dynamic>?>((ref) {
+  return ref.watch(publicApiProvider).discoverTaxonomy();
+});
+
 class DiscoverScreen extends ConsumerStatefulWidget {
   const DiscoverScreen({super.key});
 
@@ -39,7 +109,16 @@ class _DiscoverScreenState extends ConsumerState<DiscoverScreen> {
   void _applySearch() {
     final q = _searchController.text.trim();
     ref.read(discoverFiltersProvider.notifier).update(
-          (s) => (q: q.isEmpty ? null : q, minRating: s.minRating, sort: s.sort),
+          (s) => s.copyWith(q: () => q.isEmpty ? null : q),
+        );
+  }
+
+  Future<void> _openFilters() async {
+    await showModalBottomSheet<void>(
+      context: context,
+      isScrollControlled: true,
+      showDragHandle: true,
+      builder: (_) => const _DiscoverFilterSheet(),
     );
   }
 
@@ -70,17 +149,27 @@ class _DiscoverScreenState extends ConsumerState<DiscoverScreen> {
                     child: TextField(
                       controller: _searchController,
                       decoration: InputDecoration(
-                        hintText: 'جستجوی نام کافه...',
+                        hintText: 'کافه دنج برای کار، نزدیک من...',
-                        border: const OutlineInputBorder(),
                         isDense: true,
+                        prefixIcon: const Icon(Icons.search),
                         suffixIcon: IconButton(
-                          icon: const Icon(Icons.search),
+                          icon: const Icon(Icons.arrow_back),
                           onPressed: _applySearch,
                         ),
                       ),
+                      textInputAction: TextInputAction.search,
                       onSubmitted: (_) => _applySearch(),
                     ),
                   ),
+                  const SizedBox(width: 8),
+                  Badge(
+                    isLabelVisible: filters.activeCount > 0,
+                    label: Text('${filters.activeCount}'),
+                    child: IconButton.filledTonal(
+                      icon: const Icon(Icons.tune),
+                      onPressed: _openFilters,
+                    ),
+                  ),
                 ],
               ),
             ),
@@ -90,26 +179,29 @@ class _DiscoverScreenState extends ConsumerState<DiscoverScreen> {
               child: Row(
                 children: [
                   FilterChip(
-                    label: const Text('همه'),
+                    label: const Text('باز است'),
-                    selected: filters.minRating == null,
+                    selected: filters.openNow,
-                    onSelected: (_) {
+                    onSelected: (v) => ref
-                      ref.read(discoverFiltersProvider.notifier).update(
+                        .read(discoverFiltersProvider.notifier)
-                            (s) => (q: s.q, minRating: null, sort: s.sort),
+                        .update((s) => s.copyWith(openNow: v)),
-                          );
-                    },
                   ),
                   const SizedBox(width: 8),
+                  FilterChip(
+                    label: const Text('همه امتیازها'),
+                    selected: filters.minRating == null,
+                    onSelected: (_) => ref
+                        .read(discoverFiltersProvider.notifier)
+                        .update((s) => s.copyWith(minRating: () => null)),
+                  ),
                   for (final min in [3.0, 4.0, 4.5])
                     Padding(
-                      padding: const EdgeInsets.only(left: 8),
+                      padding: const EdgeInsets.only(right: 8),
                       child: FilterChip(
                         label: Text('★ $min+'),
                         selected: filters.minRating == min,
-                        onSelected: (_) {
+                        onSelected: (_) => ref
-                          ref.read(discoverFiltersProvider.notifier).update(
+                            .read(discoverFiltersProvider.notifier)
-                                (s) => (q: s.q, minRating: min, sort: s.sort),
+                            .update((s) => s.copyWith(minRating: () => min)),
-                              );
-                        },
                       ),
                     ),
                 ],
@@ -121,7 +213,6 @@ class _DiscoverScreenState extends ConsumerState<DiscoverScreen> {
                 value: filters.sort,
                 decoration: const InputDecoration(
                   labelText: 'مرتب‌سازی',
-                  border: OutlineInputBorder(),
                   isDense: true,
                 ),
                 items: const [
@@ -131,9 +222,9 @@ class _DiscoverScreenState extends ConsumerState<DiscoverScreen> {
                 ],
                 onChanged: (sort) {
                   if (sort == null) return;
-                  ref.read(discoverFiltersProvider.notifier).update(
+                  ref
-                        (s) => (q: s.q, minRating: s.minRating, sort: sort),
+                      .read(discoverFiltersProvider.notifier)
-                      );
+                      .update((s) => s.copyWith(sort: sort));
                 },
               ),
             ),
@@ -143,20 +234,56 @@ class _DiscoverScreenState extends ConsumerState<DiscoverScreen> {
                   if (cafes.isEmpty) {
                     return const Center(child: Text('کافه‌ای یافت نشد'));
                   }
-                  return ListView.separated(
+                  return RefreshIndicator(
+                    onRefresh: () async => ref.refresh(discoverProvider.future),
+                    child: ListView.separated(
                       padding: const EdgeInsets.all(16),
                       itemCount: cafes.length,
                       separatorBuilder: (_, __) => const SizedBox(height: 8),
-                    itemBuilder: (context, index) {
+                      itemBuilder: (context, index) =>
-                      final cafe = cafes[index];
+                          _CafeCard(cafe: cafes[index]),
+                    ),
+                  );
+                },
+                loading: () =>
+                    const Center(child: CircularProgressIndicator()),
+                error: (e, _) => Center(child: Text('خطا: $e')),
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}
+
+class _CafeCard extends StatelessWidget {
+  const _CafeCard({required this.cafe});
+  final Map<String, dynamic> cafe;
+
+  @override
+  Widget build(BuildContext context) {
     final slug = cafe['slug'] as String;
     final name = cafe['name'] as String? ?? slug;
     final avg = (cafe['averageRating'] as num?)?.toDouble() ?? 0;
     final count = cafe['reviewCount'] as int? ?? 0;
     final address = cafe['address'] as String?;
+    final isOpen = cafe['isOpenNow'] as bool?;
     return Card(
       child: ListTile(
-                          title: Text(name),
+        title: Row(
+          children: [
+            Expanded(child: Text(name)),
+            if (isOpen != null)
+              Text(
+                isOpen ? 'باز' : 'بسته',
+                style: TextStyle(
+                  fontSize: 12,
+                  color: isOpen ? Colors.green : Colors.red,
+                ),
+              ),
+          ],
+        ),
         subtitle: Column(
           crossAxisAlignment: CrossAxisAlignment.start,
           children: [
@@ -169,16 +296,165 @@ class _DiscoverScreenState extends ConsumerState<DiscoverScreen> {
         onTap: () => context.push('/cafe/$slug'),
       ),
     );
+  }
+}
+
+class _DiscoverFilterSheet extends ConsumerWidget {
+  const _DiscoverFilterSheet();
+
+  static const _priceTiers = [
+    ('budget', 'اقتصادی'),
+    ('moderate', 'متوسط'),
+    ('upscale', 'لاکچری'),
+    ('luxury', 'بسیار لاکچری'),
+  ];
+
+  List<({String key, String label})> _parseTax(dynamic raw) {
+    if (raw is! List) return const [];
+    return raw
+        .map<({String key, String label})>((e) {
+          if (e is Map) {
+            final k = (e['key'] ?? e['value'] ?? e['id'] ?? '').toString();
+            final l = (e['labelFa'] ?? e['label'] ?? e['nameFa'] ?? e['name'] ?? k)
+                .toString();
+            return (key: k, label: l);
+          }
+          final s = e.toString();
+          return (key: s, label: s);
+        })
+        .where((t) => t.key.isNotEmpty)
+        .toList();
+  }
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final filters = ref.watch(discoverFiltersProvider);
+    final taxonomy = ref.watch(discoverTaxonomyProvider);
+    final notifier = ref.read(discoverFiltersProvider.notifier);
+
+    Widget chips(String title, List<({String key, String label})> items,
+        List<String> selected, void Function(List<String>) onChange) {
+      if (items.isEmpty) return const SizedBox.shrink();
+      return Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          Padding(
+            padding: const EdgeInsets.fromLTRB(0, 12, 0, 6),
+            child: Text(title, style: Theme.of(context).textTheme.titleSmall),
+          ),
+          Wrap(
+            spacing: 8,
+            runSpacing: 4,
+            children: [
+              for (final it in items)
+                FilterChip(
+                  label: Text(it.label),
+                  selected: selected.contains(it.key),
+                  onSelected: (v) {
+                    final next = List<String>.from(selected);
+                    if (v) {
+                      next.add(it.key);
+                    } else {
+                      next.remove(it.key);
+                    }
+                    onChange(next);
                   },
+                ),
+            ],
+          ),
+        ],
+      );
+    }
+
+    return Directionality(
+      textDirection: TextDirection.rtl,
+      child: Padding(
+        padding: EdgeInsets.fromLTRB(
+          16,
+          0,
+          16,
+          16 + MediaQuery.of(context).viewInsets.bottom,
+        ),
+        child: SingleChildScrollView(
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            crossAxisAlignment: CrossAxisAlignment.start,
+            children: [
+              Row(
+                children: [
+                  Text('فیلترها',
+                      style: Theme.of(context).textTheme.titleLarge),
+                  const Spacer(),
+                  if (filters.activeCount > 0)
+                    TextButton(
+                      onPressed: () =>
+                          notifier.state = const DiscoverFilters(),
+                      child: const Text('پاک کردن'),
+                    ),
+                ],
+              ),
+              SwitchListTile(
+                contentPadding: EdgeInsets.zero,
+                title: const Text('فقط کافه‌های باز'),
+                value: filters.openNow,
+                onChanged: (v) => notifier.update((s) => s.copyWith(openNow: v)),
+              ),
+              const Padding(
+                padding: EdgeInsets.fromLTRB(0, 8, 0, 6),
+                child: Text('محدوده قیمت'),
+              ),
+              Wrap(
+                spacing: 8,
+                children: [
+                  for (final p in _priceTiers)
+                    ChoiceChip(
+                      label: Text(p.$2),
+                      selected: filters.priceTier == p.$1,
+                      onSelected: (v) => notifier.update(
+                        (s) => s.copyWith(priceTier: () => v ? p.$1 : null),
+                      ),
+                    ),
+                ],
+              ),
+              taxonomy.when(
+                data: (tax) {
+                  if (tax == null) return const SizedBox.shrink();
+                  return Column(
+                    crossAxisAlignment: CrossAxisAlignment.start,
+                    children: [
+                      chips('فضا و حال‌وهوا', _parseTax(tax['themes']),
+                          filters.themes,
+                          (v) => notifier.update((s) => s.copyWith(themes: v))),
+                      chips('وایب', _parseTax(tax['vibes']), filters.vibes,
+                          (v) => notifier.update((s) => s.copyWith(vibes: v))),
+                      chips('مناسبت', _parseTax(tax['occasions']),
+                          filters.occasions,
+                          (v) => notifier.update((s) => s.copyWith(occasions: v))),
+                      chips('امکانات', _parseTax(tax['spaceFeatures']),
+                          filters.spaceFeatures,
+                          (v) => notifier.update(
+                              (s) => s.copyWith(spaceFeatures: v))),
+                    ],
                   );
                 },
-                loading: () => const Center(child: CircularProgressIndicator()),
+                loading: () => const Padding(
-                error: (e, _) => Center(child: Text('خطا: $e')),
+                  padding: EdgeInsets.all(16),
+                  child: Center(child: CircularProgressIndicator()),
+                ),
+                error: (_, __) => const SizedBox.shrink(),
+              ),
+              const SizedBox(height: 16),
+              SizedBox(
+                width: double.infinity,
+                child: FilledButton(
+                  onPressed: () => Navigator.of(context).pop(),
+                  child: const Text('نمایش نتایج'),
                 ),
               ),
             ],
           ),
         ),
+      ),
     );
   }
 }