feat: 添加图片消息点击查看功能

在消息气泡中点击图片时，打开全屏图片查看器。新增 `photo_view` 依赖并实现 `openImageViewer` 方法，提升用户体验。

lib/modules/agent/controllers/agent_controller.dart

@@ -15,6 +15,7 @@ import 'package:permission_handler/permission_handler.dart';
 import 'package:app_settings/app_settings.dart';
 import 'package:deep_voice/core/utils/logger.dart';
 import 'package:path_provider/path_provider.dart';
+import 'package:photo_view/photo_view.dart';
 
 class Message {
   final bool isUser; //标识信息是否来自用户还是AI
@@ -959,4 +960,28 @@ class AgentController extends GetxController {
   void openNavigation(String start, String end, String ntype) {
     _navigationManager.open(start, end, ntype);
   }
+
+  // 打开图片查看器
+  void openImageViewer(BuildContext context, String imagePath) {
+    Navigator.push(
+      context,
+      MaterialPageRoute(
+        builder: (context) => Scaffold(
+          appBar: AppBar(
+            backgroundColor: Colors.black,
+            iconTheme: IconThemeData(color: Colors.white),
+          ),
+          body: Container(
+            color: Colors.black,
+            child: PhotoView(
+              imageProvider: FileImage(File(imagePath)),
+              minScale: PhotoViewComputedScale.contained,
+              maxScale: PhotoViewComputedScale.covered * 2,
+              backgroundDecoration: BoxDecoration(color: Colors.black),
+            ),
+          ),
+        ),
+      ),
+    );
+  }
 }

lib/modules/agent/views/message_bubble.dart

@@ -215,13 +215,20 @@ class MessageBubble extends GetView<AgentController> {
       if (message == '[图片]') {
         return Container(
           padding: const EdgeInsets.all(8),
-          child: ClipRRect(
-            borderRadius: BorderRadius.circular(12),
-            child: Image.file(
-              File(imagePath!),
-              width: 200,
-              height: 200,
-              fit: BoxFit.cover,
+          child: GestureDetector(
+            onTap: () {
+              // 点击图片时打开图片查看器
+              Get.find<AgentController>()
+                  .openImageViewer(context, imagePath ?? '');
+            },
+            child: ClipRRect(
+              borderRadius: BorderRadius.circular(12),
+              child: Image.file(
+                File(imagePath!),
+                width: 200,
+                height: 200,
+                fit: BoxFit.cover,
+              ),
             ),
           ),
         );
@@ -241,13 +248,20 @@ class MessageBubble extends GetView<AgentController> {
             ),
           ),
           const SizedBox(height: 8),
-          ClipRRect(
-            borderRadius: BorderRadius.circular(12),
-            child: Image.file(
-              File(imagePath!),
-              width: 200,
-              height: 200,
-              fit: BoxFit.cover,
+          GestureDetector(
+            onTap: () {
+              // 点击图片时打开图片查看器
+              Get.find<AgentController>()
+                  .openImageViewer(context, imagePath ?? '');
+            },
+            child: ClipRRect(
+              borderRadius: BorderRadius.circular(12),
+              child: Image.file(
+                File(imagePath!),
+                width: 200,
+                height: 200,
+                fit: BoxFit.cover,
+              ),
             ),
           ),
         ],

pubspec.yaml

@@ -37,6 +37,7 @@ dependencies:
   file_picker: ^10.1.5
   haptic_feedback: ^0.5.1+1
   tencentcloud_cos_sdk_plugin: ^1.2.3
+  photo_view: ^0.15.0
 
   window_size:
     git: