fix(agent): 修复图片查看器路径处理并优化交互体验

- 处理图片路径拼接逻辑，支持相对路径和完整路径
- 移除AppBar改为点击图片退出查看器
- 优化图片查看器的交互方式

lib/data/services/novice_guide_service.dart

@@ -12,7 +12,7 @@ class NoviceGuideService extends GetxService {
   StreamSubscription<dynamic>? _statusSubscription;
 
   bool isHomeGuide = true;
-  bool isAIGuide = false;
+  bool isAIGuide = true;
 
   RxBool isWakeup = false.obs;
 

lib/modules/agent/controllers/agent_controller.dart

@@ -1759,21 +1759,52 @@ class AgentController extends GetxController {
 
   // 打开图片查看器
   void openImageViewer(BuildContext context, String imagePath) {
+    // 构建完整的图片路径
+    String fullImagePath;
+    if (imagePath.startsWith('/')) {
+      // 如果是相对路径（以/开头），需要拼接AppDir.value
+      fullImagePath = '${AppDir.value}$imagePath';
+    } else {
+      // 如果已经是完整路径，直接使用
+      fullImagePath = imagePath;
+    }
+
     Navigator.push(
       context,
       MaterialPageRoute(
         builder: (context) => Scaffold(
-          appBar: AppBar(
-            backgroundColor: Colors.black,
-            iconTheme: IconThemeData(color: Colors.white),
-          ),
+          // appBar: AppBar(
+          //   backgroundColor: Colors.black,
+          //   leading: IconButton(
+          //     icon: Icon(Icons.arrow_back_ios, color: Colors.white),
+          //     onPressed: () => Navigator.of(context).pop(),
+          //   ),
+          //   iconTheme: IconThemeData(color: Colors.white),
+          //   //title: Text('图片预览', style: TextStyle(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),
+            child: GestureDetector(
+              onTap: () => Navigator.of(context).pop(), // 点击退出
+
+              child: PhotoView(
+                imageProvider: FileImage(File(fullImagePath)),
+                minScale: PhotoViewComputedScale.contained,
+                maxScale: PhotoViewComputedScale.covered * 2,
+                backgroundDecoration: BoxDecoration(color: Colors.black),
+                // errorBuilder: (context, error, stackTrace) {
+                //   return const Center(
+                //     child: Column(
+                //       mainAxisAlignment: MainAxisAlignment.center,
+                //       children: [
+                //         Icon(Icons.error, color: Colors.white, size: 64),
+                //         SizedBox(height: 16),
+                //         Text('图片加载失败', style: TextStyle(color: Colors.white)),
+                //       ],
+                //     ),
+                //   );
+                // },
+              ),
             ),
           ),
         ),