refactor: 重构 Agent 模块为 AgentScope，删除旧版 CrewAI/LiteLLM 实现

apps/test/features/calendar/data/calendar_api_test.dart

@@ -78,6 +78,7 @@ void main() {
       final created = await api.create(
         ScheduleItemModel(
           id: 'evt_local',
+          ownerId: 'user-1',
           title: '评审',
           startAt: DateTime.utc(2026, 3, 11, 3),
           endAt: DateTime.utc(2026, 3, 11, 4),
@@ -118,6 +119,7 @@ void main() {
       final api = CalendarApi(client);
       final event = ScheduleItemModel(
         id: 'evt_3',
+        ownerId: 'user-1',
         title: '同步会',
         startAt: DateTime.utc(2026, 3, 11, 1),
         metadata: ScheduleMetadata.fromJson({

apps/test/features/calendar/ui/screens/calendar_event_detail_screen_test.dart

@@ -29,6 +29,7 @@ void main() {
       _FakeCalendarService(
         event: ScheduleItemModel(
           id: 'evt_1',
+          ownerId: 'user-1',
           title: '评审会',
           startAt: DateTime(2026, 3, 11, 15, 0),
           endAt: DateTime(2026, 3, 11, 16, 0),
@@ -57,6 +58,7 @@ void main() {
       _FakeCalendarService(
         event: ScheduleItemModel(
           id: 'evt_2',
+          ownerId: 'user-1',
           title: '同步会',
           startAt: DateTime(2026, 3, 12, 10, 0),
           metadata: ScheduleMetadata(version: 1),

apps/test/features/home/ui/screens/home_screen_test.dart

@@ -102,7 +102,7 @@ void main() {
 
       expect(fakeRecorder.started, true);
       expect(find.text('正在聆听...'), findsOneWidget);
-      expect(_inputActionIcon(tester), LucideIcons.square);
+      expect(_inputActionIcon(tester), LucideIcons.send);
     });
 
     testWidgets('tap send while recording transcribes and auto sends message', (