refactor(图片资源): 替换默认耳机图片并优化图片显示逻辑

- 移除旧的headphone_new3.png和headphone_new4.png图片
- 新增defaultPicture.png和defaultPicture.jpg作为统一默认图片
- 修改图片显示逻辑，移除暗黑模式判断，使用统一图片
- 优化图片显示样式，使用cover模式并添加圆角
- 调整图片容器尺寸和间距

lib/modules/home/controllers/home_controller.dart

@@ -542,9 +542,7 @@ class HomeController extends GetxController {
     }
 
     // 使用默认耳机图片
-    return isDarkMode
+    return 'assets/images/defaultPicture.png';
-        ? 'assets/images/headphone_new3.png'
-        : 'assets/images/headphone_new4.png';
   }
 
   /// 判断是否为网络图片

lib/modules/home/views/home_view.dart

@@ -85,10 +85,12 @@ class HomeView extends GetView<HomeController> {
               // 顶部标题栏
               _buildAppBar(isDarkMode),
 
+              SizedBox(height: 10.h),
+
               // 顶部图片
               _buildEarbudsImage(),
 
-              SizedBox(height: 20.h),
+              SizedBox(height: 10.h),
 
               // 设备状态卡片
               IntroStepBuilder(
@@ -229,7 +231,7 @@ class HomeView extends GetView<HomeController> {
           Center(
             child: ClipRRect(
               // 添加 ClipRRect
-              borderRadius: BorderRadius.circular(16.r),
+              borderRadius: BorderRadius.circular(20.r),
               child: GetBuilder<HomeController>(
                 builder: (controller) {
                   final imagePath = controller.getDeviceImagePath(isDarkMode);
@@ -238,16 +240,16 @@ class HomeView extends GetView<HomeController> {
                   return isNetwork
                       ? Image.network(
                           imagePath,
+                          width: double.infinity,
                           height: 220.h,
-                          fit: BoxFit.contain,
+                          fit: BoxFit.cover,
                           errorBuilder: (context, error, stackTrace) {
                             // 网络图片加载失败时使用默认图片
                             return Image.asset(
-                              isDarkMode
+                              'assets/images/defaultPicture.png',
-                                  ? 'assets/images/headphone_new3.png'
+                              width: double.infinity,
-                                  : 'assets/images/headphone_new4.png',
                               height: 220.h,
-                              fit: BoxFit.contain,
+                              fit: BoxFit.cover,
                             );
                           },
                           loadingBuilder: (context, child, loadingProgress) {
@@ -268,16 +270,16 @@ class HomeView extends GetView<HomeController> {
                         )
                       : Image.asset(
                           imagePath,
+                          width: double.infinity,
                           height: 220.h,
-                          fit: BoxFit.contain,
+                          fit: BoxFit.cover,
                           errorBuilder: (context, error, stackTrace) {
                             // 本地图片加载失败时使用默认图片
                             return Image.asset(
-                              isDarkMode
+                              'assets/images/defaultPicture.png',
-                                  ? 'assets/images/headphone_new3.png'
+                              width: double.infinity,
-                                  : 'assets/images/headphone_new4.png',
                               height: 220.h,
-                              fit: BoxFit.contain,
+                              fit: BoxFit.cover,
                             );
                           },
                         );

lib/modules/ota_upgrade/views/ota_upgrade_view.dart

@@ -173,7 +173,7 @@ class OtaUpgradeView extends GetView<OtaUpgradeController> {
   // 设备图标
   Widget _buildDeviceIcon(bool isDarkMode) {
     return Container(
-      padding: EdgeInsets.all(16.w),
+      padding: EdgeInsets.all(6.w),
       decoration: BoxDecoration(
         color: isDarkMode
             ? Colors.white.withValues(alpha: 0.05)
@@ -191,20 +191,28 @@ class OtaUpgradeView extends GetView<OtaUpgradeController> {
           final imagePath = controller.lastConnectedDeviceImage;
 
           if (imagePath == null || imagePath.isEmpty) {
-            return Image.asset(
+            return ClipRRect(
-              isDarkMode
+              borderRadius: BorderRadius.circular(12.r),
-                  ? 'assets/images/headphone_new3.png'
+              child: SizedBox(
-                  : 'assets/images/headphone_new4.png',
+                width: 120.h,
-              height: 100.h,
+                height: 120.h,
-              fit: BoxFit.contain,
+                child: Image.asset(
+                  'assets/images/defaultPicture.jpg',
+                  fit: BoxFit.cover,
+                ),
+              ),
             );
           }
 
-          // 网络图片
+          // 网络图片（正方形裁剪）
-          return Image.network(
+          return ClipRRect(
-            imagePath,
+            borderRadius: BorderRadius.circular(16.r),
+            child: SizedBox(
+              width: 100.h,
               height: 100.h,
-            fit: BoxFit.contain,
+              child: Image.network(
+                imagePath,
+                fit: BoxFit.cover,
                 loadingBuilder: (context, child, loadingProgress) {
                   if (loadingProgress == null) return child;
                   return SizedBox(
@@ -222,15 +230,13 @@ class OtaUpgradeView extends GetView<OtaUpgradeController> {
                   );
                 },
                 errorBuilder: (context, error, stackTrace) {
-              // 网络图片加载失败时使用默认图片
                   return Image.asset(
-                isDarkMode
+                    'assets/images/defaultPicture.jpg',
-                    ? 'assets/images/headphone_new3.png'
+                    fit: BoxFit.cover,
-                    : 'assets/images/headphone_new4.png',
-                height: 100.h,
-                fit: BoxFit.contain,
                   );
                 },
+              ),
+            ),
           );
         },
       ),

pubspec.yaml

@@ -142,8 +142,8 @@ flutter:
     - assets/fonts/NotoSansSC-Regular.ttf
     - assets/lottie/
     - assets/js/
-    - assets/images/headphone_new4.png
+    - assets/images/defaultPicture.png
-    - assets/images/headphone_new3.png
+    - assets/images/defaultPicture.jpg
     - assets/images/qqmusic.png
     - assets/images/music.png
     - assets/weather/