增加markdown的效果

lib/home_page.dart

@@ -12,6 +12,7 @@ import 'services/chat_service.dart';
 import 'models/chat_message.dart';
 import 'models/user.dart';
 import 'package:shared_preferences/shared_preferences.dart';
+import 'package:flutter_markdown/flutter_markdown.dart';
 
 class HomePage extends StatefulWidget {
   const HomePage({super.key});
@@ -635,15 +636,51 @@ class _HomePageState extends State<HomePage> {
                                 !message.isUserMessage ? Radius.zero : null,
                           ),
                         ),
-                        child: Text(
-                          message.text,
-                          style: TextStyle(
-                            color: message.isUserMessage
-                                ? Colors.white
-                                : Colors.black,
-                            fontSize: 16,
-                          ),
-                        ),
+                        child: message.isUserMessage
+                            ? Text(
+                                message.text,
+                                style: const TextStyle(
+                                  color: Colors.white,
+                                  fontSize: 16,
+                                ),
+                              )
+                            : MarkdownBody(
+                                data: message.text,
+                                selectable: true,
+                                styleSheet: MarkdownStyleSheet(
+                                  p: const TextStyle(
+                                    color: Colors.black,
+                                    fontSize: 16,
+                                  ),
+                                  code: const TextStyle(
+                                    color: Colors.white,
+                                    fontFamily: 'monospace',
+                                    fontSize: 14,
+                                    height: 1.5,
+                                    backgroundColor: Colors.transparent,
+                                  ),
+                                  codeblockPadding: const EdgeInsets.all(16),
+                                  codeblockDecoration: BoxDecoration(
+                                    color: const Color(0xFF1E1E1E),
+                                    borderRadius: BorderRadius.circular(8),
+                                  ),
+                                  blockquote: const TextStyle(
+                                    color: Colors.black87,
+                                    fontSize: 16,
+                                    height: 1.5,
+                                  ),
+                                  blockquoteDecoration: BoxDecoration(
+                                    border: Border(
+                                      left: BorderSide(
+                                        color: Colors.grey[300]!,
+                                        width: 4,
+                                      ),
+                                    ),
+                                  ),
+                                  listBullet:
+                                      const TextStyle(color: Colors.black87),
+                                ),
+                              ),
                       ),
                     ),
                     if (_isLoading &&

lib/models/chat_message.dart

@@ -2,22 +2,26 @@ class ChatMessage {
   final String text;
   final bool isUserMessage;
   final DateTime timestamp;
+  final bool isMarkdown;
 
   ChatMessage({
     required this.text,
     required this.isUserMessage,
     DateTime? timestamp,
+    this.isMarkdown = true,
   }) : timestamp = timestamp ?? DateTime.now();
 
   Map<String, dynamic> toJson() => {
         'text': text,
         'isUserMessage': isUserMessage,
         'timestamp': timestamp.toIso8601String(),
+        'isMarkdown': isMarkdown,
       };
 
   factory ChatMessage.fromJson(Map<String, dynamic> json) => ChatMessage(
         text: json['text'],
         isUserMessage: json['isUserMessage'],
         timestamp: DateTime.parse(json['timestamp']),
+        isMarkdown: json['isMarkdown'],
       );
-} 
+}
\ No newline at end of file

pubspec.lock

@@ -9,6 +9,14 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "3.3.4"
+  args:
+    dependency: transitive
+    description:
+      name: args
+      sha256: bf9f5caeea8d8fe6721a9c358dd8a5c1947b27f1cfaa18b39c301273594919e6
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.6.0"
   async:
     dependency: transitive
     description:
@@ -102,6 +110,14 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_highlight:
+    dependency: "direct main"
+    description:
+      name: flutter_highlight
+      sha256: "7b96333867aa07e122e245c033b8ad622e4e3a42a1a2372cbb098a2541d8782c"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.7.0"
   flutter_lints:
     dependency: "direct dev"
     description:
@@ -110,6 +126,14 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "2.0.3"
+  flutter_markdown:
+    dependency: "direct main"
+    description:
+      name: flutter_markdown
+      sha256: "04c4722cc36ec5af38acc38ece70d22d3c2123c61305d555750a091517bbe504"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.6.23"
   flutter_test:
     dependency: "direct dev"
     description: flutter
@@ -128,6 +152,14 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  highlight:
+    dependency: transitive
+    description:
+      name: highlight
+      sha256: "5353a83ffe3e3eca7df0abfb72dcf3fa66cc56b953728e7113ad4ad88497cf21"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.7.0"
   http:
     dependency: "direct main"
     description:
@@ -192,6 +224,14 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "2.1.1"
+  markdown:
+    dependency: "direct main"
+    description:
+      name: markdown
+      sha256: ef2a1298144e3f985cc736b22e0ccdaf188b5b3970648f2d9dc13efd1d9df051
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "7.2.2"
   matcher:
     dependency: transitive
     description:

pubspec.yaml

@@ -40,6 +40,9 @@ dependencies:
   animate_do: ^3.0.2
   shared_preferences: ^2.0.15
   uuid: ^4.3.3
+  flutter_markdown: ^0.6.18
+  flutter_highlight: ^0.7.0
+  markdown: ^7.1.1
 
 dev_dependencies:
   flutter_test: