增加历史会话功能（目前历史会话保存到本地）

lib/home_page.dart

-import 'package:allen/feature_box.dart';
 import 'package:allen/openai_service.dart';
 import 'package:allen/pallete.dart';
 import 'package:animate_do/animate_do.dart';
@@ -6,18 +5,12 @@ import 'package:flutter/material.dart';
 import 'package:flutter_tts/flutter_tts.dart';
 import 'package:speech_to_text/speech_recognition_result.dart';
 import 'package:speech_to_text/speech_to_text.dart';
-import 'dart:io' show Platform;
 import 'package:flutter/foundation.dart' show kIsWeb;
-
-class ChatMessage {
-  final String text;
-  final bool isUserMessage;
-
-  ChatMessage({
-    required this.text,
-    required this.isUserMessage,
-  });
-}
+import 'package:uuid/uuid.dart';
+import 'models/conversation.dart';
+import 'services/storage_service.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+import 'models/chat_message.dart';
 
 class HomePage extends StatefulWidget {
   const HomePage({super.key});
@@ -37,19 +30,63 @@ class _HomePageState extends State<HomePage> {
   int delay = 200;
   final TextEditingController _messageController = TextEditingController();
   String currentStreamedContent = '';
-  final List<ChatMessage> messages = [];
+  List<ChatMessage> messages = [];
   bool _isLoading = false;
   bool _isVoiceMode = true;
   bool _isListeningPressed = false;
   String _currentVoiceText = '';
+  late StorageService _storageService;
+  late Conversation _currentConversation;
+  List<Conversation> _conversations = [];
 
   @override
   void initState() {
     super.initState();
+    _initializeStorage();
     initSpeechToText();
     _initTts();
   }
 
+  Future<void> _initializeStorage() async {
+    final prefs = await SharedPreferences.getInstance();
+    _storageService = StorageService(prefs);
+    _conversations = await _storageService.getConversations();
+    if (_conversations.isEmpty) {
+      _createNewConversation();
+    } else {
+      _currentConversation = _conversations.first;
+      setState(() {
+        messages = _currentConversation.messages;
+      });
+    }
+  }
+
+  Future<void> _createNewConversation() async {
+    final newConversation = Conversation(
+      id: const Uuid().v4(),
+      title: '新会话 ${_conversations.length + 1}',
+      createdAt: DateTime.now(),
+      messages: [],
+    );
+
+    await _storageService.addConversation(newConversation);
+    setState(() {
+      _conversations.insert(0, newConversation);
+      _currentConversation = newConversation;
+      messages = [];
+    });
+  }
+
+  Future<void> _updateCurrentConversation() async {
+    _currentConversation = Conversation(
+      id: _currentConversation.id,
+      title: _currentConversation.title,
+      createdAt: _currentConversation.createdAt,
+      messages: messages,
+    );
+    await _storageService.updateConversation(_currentConversation);
+  }
+
   Future<void> _initTts() async {
     if (!kIsWeb) {
       await flutterTts.setSharedInstance(true);
@@ -128,6 +165,7 @@ class _HomePageState extends State<HomePage> {
         });
       }
       await systemSpeak(fullResponse);
+      await _updateCurrentConversation();
     } catch (e) {
       setState(() {
         messages.add(ChatMessage(
@@ -164,6 +202,7 @@ class _HomePageState extends State<HomePage> {
         });
       }
       await systemSpeak(fullResponse);
+      await _updateCurrentConversation();
     } catch (e) {
       setState(() {
         messages.add(ChatMessage(
@@ -296,16 +335,101 @@ class _HomePageState extends State<HomePage> {
     );
   }
 
-  @override
-  Widget build(BuildContext context) {
-    return Scaffold(
-      appBar: AppBar(
+  AppBar _buildAppBar() {
+    return AppBar(
       title: BounceInDown(
         child: const Text('快际新云'),
       ),
-        leading: const Icon(Icons.menu),
+      leading: Builder(
+        builder: (context) => IconButton(
+          icon: const Icon(Icons.menu),
+          onPressed: () => Scaffold.of(context).openDrawer(),
+        ),
+      ),
       centerTitle: true,
+    );
+  }
+
+  Widget _buildDrawer() {
+    return Drawer(
+      child: Column(
+        children: [
+          DrawerHeader(
+            decoration: BoxDecoration(
+              color: Pallete.firstSuggestionBoxColor,
             ),
+            child: const Center(
+              child: Text(
+                '会话列表',
+                style: TextStyle(
+                  color: Colors.white,
+                  fontSize: 24,
+                ),
+              ),
+            ),
+          ),
+          ListTile(
+            leading: const Icon(Icons.add),
+            title: const Text('新建会话'),
+            onTap: () {
+              _createNewConversation();
+              Navigator.pop(context);
+            },
+          ),
+          Expanded(
+            child: ListView.builder(
+              itemCount: _conversations.length,
+              itemBuilder: (context, index) {
+                final conversation = _conversations[index];
+                return ListTile(
+                  leading: const Icon(Icons.chat),
+                  title: Text(conversation.title),
+                  subtitle: Text(
+                    conversation.messages.isEmpty
+                        ? '暂无消息'
+                        : conversation.messages.last.text,
+                    maxLines: 1,
+                    overflow: TextOverflow.ellipsis,
+                  ),
+                  selected: _currentConversation.id == conversation.id,
+                  onTap: () {
+                    setState(() {
+                      _currentConversation = conversation;
+                      messages = conversation.messages;
+                    });
+                    Navigator.pop(context);
+                  },
+                  trailing: IconButton(
+                    icon: const Icon(Icons.delete),
+                    onPressed: () async {
+                      await _storageService.deleteConversation(conversation.id);
+                      setState(() {
+                        _conversations.removeAt(index);
+                        if (_currentConversation.id == conversation.id) {
+                          if (_conversations.isEmpty) {
+                            _createNewConversation();
+                          } else {
+                            _currentConversation = _conversations.first;
+                            messages = _currentConversation.messages;
+                          }
+                        }
+                      });
+                    },
+                  ),
+                );
+              },
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: _buildAppBar(),
+      drawer: _buildDrawer(),
       body: Column(
         children: [
           Expanded(

lib/models/chat_message.dart

+class ChatMessage {
+  final String text;
+  final bool isUserMessage;
+  final DateTime timestamp;
+
+  ChatMessage({
+    required this.text,
+    required this.isUserMessage,
+    DateTime? timestamp,
+  }) : timestamp = timestamp ?? DateTime.now();
+
+  Map<String, dynamic> toJson() => {
+        'text': text,
+        'isUserMessage': isUserMessage,
+        'timestamp': timestamp.toIso8601String(),
+      };
+
+  factory ChatMessage.fromJson(Map<String, dynamic> json) => ChatMessage(
+        text: json['text'],
+        isUserMessage: json['isUserMessage'],
+        timestamp: DateTime.parse(json['timestamp']),
+      );
+} 
\ No newline at end of file

lib/models/conversation.dart

+import 'chat_message.dart';
+
+class Conversation {
+  final String id;
+  final String title;
+  final DateTime createdAt;
+  final List<ChatMessage> messages;
+
+  Conversation({
+    required this.id,
+    required this.title,
+    required this.createdAt,
+    required this.messages,
+  });
+
+  Map<String, dynamic> toJson() => {
+        'id': id,
+        'title': title,
+        'createdAt': createdAt.toIso8601String(),
+        'messages': messages.map((msg) => msg.toJson()).toList(),
+      };
+
+  factory Conversation.fromJson(Map<String, dynamic> json) => Conversation(
+        id: json['id'],
+        title: json['title'],
+        createdAt: DateTime.parse(json['createdAt']),
+        messages: (json['messages'] as List)
+            .map((msg) => ChatMessage.fromJson(msg))
+            .toList(),
+      );
+} 
\ No newline at end of file

lib/services/storage_service.dart

+import 'dart:convert';
+import 'package:shared_preferences/shared_preferences.dart';
+import '../models/conversation.dart';
+
+class StorageService {
+  static const String _conversationsKey = 'conversations';
+  final SharedPreferences _prefs;
+
+  StorageService(this._prefs);
+
+  Future<List<Conversation>> getConversations() async {
+    final String? data = _prefs.getString(_conversationsKey);
+    if (data == null) return [];
+
+    List<dynamic> jsonList = json.decode(data);
+    return jsonList.map((json) => Conversation.fromJson(json)).toList();
+  }
+
+  Future<void> saveConversations(List<Conversation> conversations) async {
+    final String data = json.encode(
+      conversations.map((conv) => conv.toJson()).toList(),
+    );
+    await _prefs.setString(_conversationsKey, data);
+  }
+
+  Future<void> addConversation(Conversation conversation) async {
+    final conversations = await getConversations();
+    conversations.insert(0, conversation);
+    await saveConversations(conversations);
+  }
+
+  Future<void> updateConversation(Conversation conversation) async {
+    final conversations = await getConversations();
+    final index =
+        conversations.indexWhere((conv) => conv.id == conversation.id);
+    if (index != -1) {
+      conversations[index] = conversation;
+      await saveConversations(conversations);
+    }
+  }
+
+  Future<void> deleteConversation(String id) async {
+    final conversations = await getConversations();
+    conversations.removeWhere((conv) => conv.id == id);
+    await saveConversations(conversations);
+  }
+}

macos/Flutter/GeneratedPluginRegistrant.swift

@@ -6,9 +6,11 @@ import FlutterMacOS
 import Foundation
 
 import flutter_tts
+import shared_preferences_foundation
 import speech_to_text_macos
 
 func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
   FlutterTtsPlugin.register(with: registry.registrar(forPlugin: "FlutterTtsPlugin"))
+  SharedPreferencesPlugin.register(with: registry.registrar(forPlugin: "SharedPreferencesPlugin"))
   SpeechToTextMacosPlugin.register(with: registry.registrar(forPlugin: "SpeechToTextMacosPlugin"))
 }

pubspec.lock

@@ -49,6 +49,14 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "1.18.0"
+  crypto:
+    dependency: transitive
+    description:
+      name: crypto
+      sha256: "1e445881f28f22d6140f181e07737b22f1e099a5e1ff94b0af2f9e4a463f4855"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "3.0.6"
   cupertino_icons:
     dependency: "direct main"
     description:
@@ -65,6 +73,30 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "1.3.1"
+  ffi:
+    dependency: transitive
+    description:
+      name: ffi
+      sha256: "16ed7b077ef01ad6170a3d0c57caa4a112a38d7a2ed5602e0aca9ca6f3d98da6"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.1.3"
+  file:
+    dependency: transitive
+    description:
+      name: file
+      sha256: a3b4f84adafef897088c160faf7dfffb7696046cb13ae90b508c2cbc95d3b8d4
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "7.0.1"
+  fixnum:
+    dependency: transitive
+    description:
+      name: fixnum
+      sha256: b6dc7065e46c974bc7c5f143080a6764ec7a4be6da1285ececdc37be96de53be
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.1.1"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -192,6 +224,30 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "1.9.0"
+  path_provider_linux:
+    dependency: transitive
+    description:
+      name: path_provider_linux
+      sha256: f7a1fe3a634fe7734c8d3f2766ad746ae2a2884abe22e241a8b301bf5cac3279
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.2.1"
+  path_provider_platform_interface:
+    dependency: transitive
+    description:
+      name: path_provider_platform_interface
+      sha256: "88f5779f72ba699763fa3a3b06aa4bf6de76c8e5de842cf6f29e2e06476c2334"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.1.2"
+  path_provider_windows:
+    dependency: transitive
+    description:
+      name: path_provider_windows
+      sha256: bd6f00dbd873bfb70d0761682da2b3a2c2fccc2b9e84c495821639601d81afe7
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.3.0"
   pedantic:
     dependency: transitive
     description:
@@ -200,6 +256,14 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "1.11.1"
+  platform:
+    dependency: transitive
+    description:
+      name: platform
+      sha256: "5d6b1b0036a5f331ebc77c850ebc8506cbc1e9416c27e59b439f917a902a4984"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "3.1.6"
   plugin_platform_interface:
     dependency: transitive
     description:
@@ -208,6 +272,62 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "2.1.8"
+  shared_preferences:
+    dependency: "direct main"
+    description:
+      name: shared_preferences
+      sha256: "746e5369a43170c25816cc472ee016d3a66bc13fcf430c0bc41ad7b4b2922051"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.3.2"
+  shared_preferences_android:
+    dependency: transitive
+    description:
+      name: shared_preferences_android
+      sha256: "3b9febd815c9ca29c9e3520d50ec32f49157711e143b7a4ca039eb87e8ade5ab"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.3.3"
+  shared_preferences_foundation:
+    dependency: transitive
+    description:
+      name: shared_preferences_foundation
+      sha256: "07e050c7cd39bad516f8d64c455f04508d09df104be326d8c02551590a0d513d"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.5.3"
+  shared_preferences_linux:
+    dependency: transitive
+    description:
+      name: shared_preferences_linux
+      sha256: "580abfd40f415611503cae30adf626e6656dfb2f0cee8f465ece7b6defb40f2f"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.4.1"
+  shared_preferences_platform_interface:
+    dependency: transitive
+    description:
+      name: shared_preferences_platform_interface
+      sha256: "57cbf196c486bc2cf1f02b85784932c6094376284b3ad5779d1b1c6c6a816b80"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.4.1"
+  shared_preferences_web:
+    dependency: transitive
+    description:
+      name: shared_preferences_web
+      sha256: d2ca4132d3946fec2184261726b355836a82c33d7d5b67af32692aff18a4684e
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.4.2"
+  shared_preferences_windows:
+    dependency: transitive
+    description:
+      name: shared_preferences_windows
+      sha256: "94ef0f72b2d71bc3e700e025db3710911bd51a71cefb65cc609dd0d9a982e3c1"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.4.1"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -245,6 +365,14 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "2.3.0"
+  sprintf:
+    dependency: transitive
+    description:
+      name: sprintf
+      sha256: "1fc9ffe69d4df602376b52949af107d8f5703b77cda567c4d7d86a0693120f23"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "7.0.0"
   stack_trace:
     dependency: transitive
     description:
@@ -293,6 +421,14 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "1.4.0"
+  uuid:
+    dependency: "direct main"
+    description:
+      name: uuid
+      sha256: a5be9ef6618a7ac1e964353ef476418026db906c4facdedaa299b7a2e71690ff
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "4.5.1"
   vector_math:
     dependency: transitive
     description:
@@ -309,6 +445,22 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "14.2.5"
+  web:
+    dependency: transitive
+    description:
+      name: web
+      sha256: cd3543bd5798f6ad290ea73d210f423502e71900302dde696f8bff84bf89a1cb
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.1.0"
+  xdg_directories:
+    dependency: transitive
+    description:
+      name: xdg_directories
+      sha256: "7a3f37b05d989967cdddcbb571f1ea834867ae2faa29725fd085180e0883aa15"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.1.0"
 sdks:
   dart: ">=3.5.0 <4.0.0"
-  flutter: ">=3.18.0-18.0.pre.54"
+  flutter: ">=3.24.0"

pubspec.yaml

@@ -39,6 +39,8 @@ dependencies:
   http: ^0.13.5
   flutter_tts: ^3.6.3
   animate_do: ^3.0.2
+  shared_preferences: ^2.2.2
+  uuid: ^4.3.3
 
 dev_dependencies:
   flutter_test: