feat: 穿搭页增加场景选择（通勤/约会/聚会/运动），生成时作为依据传参

lib/features/outfit/outfit_page.dart

@@ -19,8 +19,11 @@ class OutfitPage extends ConsumerStatefulWidget {
 class _OutfitPageState extends ConsumerState<OutfitPage> {
   DateTimeRange? _dateRange;
   final _locationCtrl = TextEditingController();
+  String _occasion = '通勤';
   bool _submitting = false;
 
+  static const _occasions = ['通勤', '约会', '聚会', '运动'];
+
   @override
   void dispose() {
     _locationCtrl.dispose();
@@ -62,6 +65,7 @@ class _OutfitPageState extends ConsumerState<OutfitPage> {
           startDate: _fmt(range.start),
           endDate: _fmt(range.end),
           location: location,
+          occasion: _occasion,
         );
     if (!mounted) return;
     setState(() => _submitting = false);
@@ -115,6 +119,24 @@ class _OutfitPageState extends ConsumerState<OutfitPage> {
                       ),
                     ),
                     const SizedBox(height: 16),
+                    const Text('场景',
+                        style:
+                            TextStyle(fontSize: 13, fontWeight: FontWeight.w600)),
+                    const SizedBox(height: 8),
+                    Wrap(
+                      spacing: 8,
+                      children: [
+                        for (final o in _occasions)
+                          ChoiceChip(
+                            label: Text(o),
+                            selected: _occasion == o,
+                            onSelected: _submitting
+                                ? null
+                                : (_) => setState(() => _occasion = o),
+                          ),
+                      ],
+                    ),
+                    const SizedBox(height: 16),
                     if (gen.phase == GeneratePhase.running)
                       Padding(
                         padding: const EdgeInsets.only(bottom: 12),

lib/features/outfit/outfit_provider.dart

@@ -146,6 +146,7 @@ class GenerateNotifier extends Notifier<GenerateState> {
     required String startDate,
     required String endDate,
     required String location,
+    required String occasion,
   }) async {
     state =
         const GenerateState(phase: GeneratePhase.running, statusText: '任务创建中...');
@@ -154,6 +155,7 @@ class GenerateNotifier extends Notifier<GenerateState> {
       'start_date': startDate,
       'end_date': endDate,
       'location': location,
+      'occasion': occasion,
     });
     final taskId = (data['task_id'] as num).toInt();