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/ai_decision_engine_test.dart

@@ -112,13 +112,18 @@ void main() {
   });
 
   group('tryForceTrigger', () {
-    test('returns ForceTriggerResult for "#tool:create_calendar_event {}"', () {
-      final result = engine.tryForceTrigger('#tool:create_calendar_event {}');
+    test(
+      'returns ForceTriggerResult for "#tool:front.navigate_to_route {}"',
+      () {
+        final result = engine.tryForceTrigger(
+          '#tool:front.navigate_to_route {}',
+        );
 
-      expect(result, isNotNull);
-      expect(result!.toolName, 'create_calendar_event');
-      expect(result.args, isEmpty);
-    });
+        expect(result, isNotNull);
+        expect(result!.toolName, 'front.navigate_to_route');
+        expect(result.args, isEmpty);
+      },
+    );
 
     test(
       'returns ForceTriggerResult with args for "#tool:custom {"key": "value"}"',