refactor(translation): 优化权限检查逻辑和悬浮按钮拖拽处理

修复Android 11+版本存储权限检查直接返回的问题
将悬浮按钮拖拽逻辑提取为独立方法并增加安全区域检查
在调试模式下显示opus解码测试选项

lib/modules/settings/views/settings_view.dart

@@ -515,22 +515,27 @@ class SettingsView extends GetView<SettingsController> {
                   //         ? Colors.white.withOpacity(0.1)
                   //         : Colors.grey[200]),
                   // //BLE测试
-                  // _buildSimpleNavigationSetting(
-                  //   title: 'opus解码测试',
-                  //   subtitle: '测试opus解码',
-                  //   icon: Icons.bluetooth_searching,
-                  //   iconBgColor: isDarkMode
-                  //       ? Colors.green[900]!.withOpacity(0.3)
-                  //       : Colors.green[100]!,
-                  //   iconColor:
-                  //       isDarkMode ? Colors.green[300]! : Colors.green[600]!,
-                  //   titleColor: isDarkMode ? Colors.white : null,
-                  //   subtitleColor: isDarkMode ? Colors.white70 : null,
-                  //   onTap: () {
-                  //     Get.toNamed(Routes.opusTest);
-                  //   },
-                  //   isDarkMode: isDarkMode,
-                  // ),
+
+                  Obx(() => controller.showDebugInfo.value
+                      ? _buildSimpleNavigationSetting(
+                          title: 'opus解码测试',
+                          subtitle: '测试opus解码',
+                          icon: Icons.bluetooth_searching,
+                          iconBgColor: isDarkMode
+                              ? Colors.green[900]!.withOpacity(0.3)
+                              : Colors.green[100]!,
+                          iconColor: isDarkMode
+                              ? Colors.green[300]!
+                              : Colors.green[600]!,
+                          titleColor: isDarkMode ? Colors.white : null,
+                          subtitleColor: isDarkMode ? Colors.white70 : null,
+                          onTap: () {
+                            Get.toNamed(Routes.opusTest);
+                          },
+                          isDarkMode: isDarkMode,
+                        )
+                      : const SizedBox.shrink()),
+
                   // Divider(
                   //     height: 1,
                   //     color: isDarkMode

lib/modules/translation/controllers/translation_list_controller.dart

@@ -104,7 +104,7 @@ class TranslationListController extends GetxController {
         // Android 11+ (API 30+) 不需要存储权限
         if (sdkVersion >= 30) {
           Logger.d("Permission", "Android 11+版本，无需请求存储权限");
-          //return true; // 直接返回true，表示可以使用存储
+          return; // 直接返回，表示可以使用存储
         }
       } catch (e) {
         Logger.e("Permission", "获取Android版本信息失败: $e");

lib/modules/translation/views/widgets/draggable_floating_button.dart

@@ -55,19 +55,7 @@ class DraggableFloatingButton extends StatelessWidget {
               ),
             ),
             onDragEnd: (details) {
-              // 计算新位置（相对于屏幕右下角）
-              final screenSize = MediaQuery.of(Get.context!).size;
-              final newRight = screenSize.width - details.offset.dx - 56.w;
-              final newBottom = screenSize.height - details.offset.dy - 56.w;
-
-              // 边界检查，确保按钮不会超出屏幕
-              final clampedRight = newRight.clamp(0.0, screenSize.width - 56.w);
-              final clampedBottom =
-                  newBottom.clamp(0.0, screenSize.height - 56.w);
-
-              // 保存新位置
-              controller.saveFloatingButtonPosition(
-                  Offset(clampedRight, clampedBottom));
+              _handleDragEnd(context, details);
             },
             child: GestureDetector(
               onTap: () => _showTranslationModeSelector(isDarkMode),
@@ -96,6 +84,28 @@ class DraggableFloatingButton extends StatelessWidget {
         ));
   }
 
+  /// 处理拖拽结束事件
+  void _handleDragEnd(BuildContext context, DraggableDetails details) {
+    final screenSize = MediaQuery.of(context).size;
+    final appBarHeight = Scaffold.of(context).appBarMaxHeight ?? kToolbarHeight;
+    final statusBarHeight = MediaQuery.of(context).padding.top;
+    final safeAreaTop = statusBarHeight + appBarHeight;
+
+    // 计算新位置（相对于屏幕右下角）
+    final newRight = screenSize.width - details.offset.dx - 56.w;
+    final newBottom = screenSize.height - details.offset.dy - 56.w;
+
+    // 边界检查，确保按钮不会超出屏幕或被AppBar遮盖
+    final clampedRight = newRight.clamp(0.0, screenSize.width - 56.w);
+    final clampedBottom = newBottom.clamp(
+      0.0, // 底部边界
+      screenSize.height - safeAreaTop - 56.w, // 顶部边界（避免被AppBar遮盖）
+    );
+
+    // 保存新位置
+    controller.saveFloatingButtonPosition(Offset(clampedRight, clampedBottom));
+  }
+
   /// 显示翻译模式选择器
   void _showTranslationModeSelector(bool isDarkMode) {
     TranslationModeSelector.show(isDarkMode);