feat(agent): add voice input capability and standardize tool naming

- Add voice recording with transcribe endpoint (ASR) for multimodal input
- Android: add RECORD_AUDIO and INTERNET permissions
- Refactor tool naming: frontend tools use 'front.' prefix, backend tools use 'back.'
- Migrate calendar tools: create_calendar_event -> back.mutate/list/delete events
- Add calendar_event_list.v1 and calendar_operation.v1 UI card types
- Update all Flutter and Python tests to match new tool naming conventions
- Add record package dependency for voice recording

apps/test/features/chat/ui_schema_renderer_test.dart

@@ -94,6 +94,61 @@ void main() {
       expect(find.text('AI生成'), findsOneWidget);
     });
 
+    testWidgets('calendar_card.v1 renders agent generated tag', (tester) async {
+      final card = UiCard(
+        cardType: 'calendar_card.v1',
+        data: CalendarCardData(
+          id: 'evt_001',
+          title: 'Meeting',
+          startAt: '2026-03-01T10:00:00Z',
+          sourceType: 'agent_generated',
+        ).toJson(),
+      );
+
+      await tester.pumpWidget(
+        MaterialApp(home: Scaffold(body: UiSchemaRenderer.render(card))),
+      );
+
+      expect(find.text('AI生成'), findsOneWidget);
+    });
+
+    testWidgets('calendar_event_list.v1 renders list items', (tester) async {
+      final card = UiCard(
+        cardType: 'calendar_event_list.v1',
+        data: {
+          'items': [
+            {'id': 'evt_1', 'title': '晨会'},
+            {'id': 'evt_2', 'title': '评审'},
+          ],
+          'pagination': {'page': 1, 'total': 2},
+        },
+      );
+
+      await tester.pumpWidget(
+        MaterialApp(home: Scaffold(body: UiSchemaRenderer.render(card))),
+      );
+
+      expect(find.text('日程列表'), findsOneWidget);
+      expect(find.text('晨会'), findsOneWidget);
+      expect(find.text('评审'), findsOneWidget);
+    });
+
+    testWidgets('calendar_operation.v1 renders operation message', (
+      tester,
+    ) async {
+      final card = UiCard(
+        cardType: 'calendar_operation.v1',
+        data: {'operation': 'delete', 'ok': true, 'message': '日程已删除'},
+      );
+
+      await tester.pumpWidget(
+        MaterialApp(home: Scaffold(body: UiSchemaRenderer.render(card))),
+      );
+
+      expect(find.text('日程delete结果'), findsOneWidget);
+      expect(find.text('日程已删除'), findsOneWidget);
+    });
+
     testWidgets('error_card.v1 renders error message', (tester) async {
       final card = UiCard(
         cardType: 'error_card.v1',