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/home/ui/screens/home_screen_test.dart

@@ -1,12 +1,36 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:lucide_icons/lucide_icons.dart';
+import 'package:social_app/core/api/api_exception.dart';
+import 'package:social_app/features/home/data/voice_recorder.dart';
 import 'package:social_app/features/home/ui/screens/home_screen.dart';
 
+class _FakeVoiceRecorder implements VoiceRecorder {
+  bool started = false;
+  String? stoppedPath;
+
+  @override
+  Future<void> start() async {
+    started = true;
+  }
+
+  @override
+  Future<String?> stop() async {
+    started = false;
+    stoppedPath = '/tmp/test-audio.wav';
+    return stoppedPath;
+  }
+
+  @override
+  Future<void> dispose() async {}
+}
+
 void main() {
   group('HomeScreen Widget Tests', () {
     testWidgets('displays input field', (WidgetTester tester) async {
-      await tester.pumpWidget(const MaterialApp(home: HomeScreen()));
+      await tester.pumpWidget(
+        const MaterialApp(home: HomeScreen(autoLoadHistory: false)),
+      );
       await tester.pumpAndSettle();
 
       expect(find.byType(TextField), findsOneWidget);
@@ -14,7 +38,9 @@ void main() {
     });
 
     testWidgets('displays header icons', (WidgetTester tester) async {
-      await tester.pumpWidget(const MaterialApp(home: HomeScreen()));
+      await tester.pumpWidget(
+        const MaterialApp(home: HomeScreen(autoLoadHistory: false)),
+      );
       await tester.pumpAndSettle();
 
       expect(find.byIcon(LucideIcons.settings), findsOneWidget);
@@ -25,10 +51,116 @@ void main() {
     testWidgets('displays send or mic icon based on input', (
       WidgetTester tester,
     ) async {
-      await tester.pumpWidget(const MaterialApp(home: HomeScreen()));
+      await tester.pumpWidget(
+        const MaterialApp(home: HomeScreen(autoLoadHistory: false)),
+      );
       await tester.pumpAndSettle();
 
       expect(find.byIcon(LucideIcons.mic), findsOneWidget);
     });
+
+    testWidgets('tap mic starts recording and shows listening state', (
+      WidgetTester tester,
+    ) async {
+      final fakeRecorder = _FakeVoiceRecorder();
+      await tester.pumpWidget(
+        MaterialApp(
+          home: HomeScreen(voiceRecorder: fakeRecorder, autoLoadHistory: false),
+        ),
+      );
+      await tester.pumpAndSettle();
+
+      await tester.tap(find.byIcon(LucideIcons.mic));
+      await tester.pump();
+
+      expect(fakeRecorder.started, true);
+      expect(find.text('正在聆听...'), findsOneWidget);
+      expect(find.byIcon(LucideIcons.square), findsOneWidget);
+      expect(find.byIcon(LucideIcons.send), findsOneWidget);
+    });
+
+    testWidgets('tap send while recording transcribes and auto sends message', (
+      WidgetTester tester,
+    ) async {
+      final fakeRecorder = _FakeVoiceRecorder();
+      String? sentTranscript;
+      await tester.pumpWidget(
+        MaterialApp(
+          home: HomeScreen(
+            voiceRecorder: fakeRecorder,
+            autoLoadHistory: false,
+            onTranscribeAudio: (filePath) async {
+              expect(filePath, '/tmp/test-audio.wav');
+              return '语音自动发送';
+            },
+            onAutoSendTranscript: (transcript) async {
+              sentTranscript = transcript;
+            },
+          ),
+        ),
+      );
+      await tester.pumpAndSettle();
+
+      await tester.tap(find.byIcon(LucideIcons.mic));
+      await tester.pump();
+      await tester.tap(find.byIcon(LucideIcons.send));
+      await tester.pumpAndSettle();
+
+      expect(sentTranscript, '语音自动发送');
+      expect(find.byIcon(LucideIcons.plus), findsOneWidget);
+    });
+
+    testWidgets('tap stop transcribes audio and fills input', (
+      WidgetTester tester,
+    ) async {
+      final fakeRecorder = _FakeVoiceRecorder();
+      await tester.pumpWidget(
+        MaterialApp(
+          home: HomeScreen(
+            voiceRecorder: fakeRecorder,
+            autoLoadHistory: false,
+            onTranscribeAudio: (filePath) async {
+              expect(filePath, '/tmp/test-audio.wav');
+              return '语音转文字结果';
+            },
+          ),
+        ),
+      );
+      await tester.pumpAndSettle();
+
+      await tester.tap(find.byIcon(LucideIcons.mic));
+      await tester.pump();
+      await tester.tap(find.byIcon(LucideIcons.square));
+      await tester.pumpAndSettle();
+
+      expect(find.text('语音转文字结果'), findsOneWidget);
+      expect(find.byIcon(LucideIcons.plus), findsOneWidget);
+    });
+
+    testWidgets('tap stop shows readable unauthorized message', (
+      WidgetTester tester,
+    ) async {
+      final fakeRecorder = _FakeVoiceRecorder();
+      await tester.pumpWidget(
+        MaterialApp(
+          home: HomeScreen(
+            voiceRecorder: fakeRecorder,
+            autoLoadHistory: false,
+            onTranscribeAudio: (_) async {
+              throw const UnauthorizedException();
+            },
+          ),
+        ),
+      );
+      await tester.pumpAndSettle();
+
+      await tester.tap(find.byIcon(LucideIcons.mic));
+      await tester.pump();
+      await tester.tap(find.byIcon(LucideIcons.square));
+      await tester.pumpAndSettle();
+
+      expect(find.text('请重新登录'), findsOneWidget);
+      await tester.pump(const Duration(seconds: 3));
+    });
   });
 }