refactor(translation): 优化语言选择对话框的UI和交互

- 使用GestureDetector替代ListTile提升点击体验
- 统一圆角尺寸和内边距保持设计一致性
- 改进选中状态视觉反馈，增加背景色和边框
- 优化暗黑模式下的颜色对比度
- 简化代码结构，移除冗余容器

lib/modules/translation/views/translation_view.dart

@@ -670,59 +670,47 @@ class TranslationView extends GetView<TranslationController> {
   void _showLanguageSelectionDialog(bool isSource, bool isDarkMode) {
   Get.dialog(
     Dialog(
+      backgroundColor: isDarkMode ? Colors.grey[900] : Colors.white,
       shape: RoundedRectangleBorder(
-          borderRadius: BorderRadius.circular(24.r),
+        borderRadius: BorderRadius.circular(16.r), // 统一圆角尺寸为16
       ),
       insetPadding: EdgeInsets.symmetric(horizontal: 20.w),
-        backgroundColor: isDarkMode ? AppColors.cardBackground : Colors.white,
+      child: Padding(  // 使用Padding替代Container的padding
-        child: Container(
+        padding: EdgeInsets.all(12.w),  // 统一内边距
-          width: 0.9.sw,
-          padding: EdgeInsets.only(top: 32.h, bottom: 16.h),
         child: Column(
           mainAxisSize: MainAxisSize.min,
           crossAxisAlignment: CrossAxisAlignment.start,
           children: [
+            // 标题区域
             Padding(
-                padding: EdgeInsets.symmetric(horizontal: 24.w),
+              padding: EdgeInsets.symmetric(horizontal: 8.w),
               child: Text(
                 isSource 
-                      ? 'selectSourceLanguage'.tr // 选择源语言
+                    ? 'selectSourceLanguage'.tr 
-                      : 'selectTargetLanguage'.tr, // 选择目标语言
+                    : 'selectTargetLanguage'.tr, // 保留源语言/目标语言区分
                 style: TextStyle(
-                    fontSize: 20.sp,
+                  fontSize: 18.sp,  // 调整字号
-                    fontWeight: FontWeight.bold,
+                  fontWeight: FontWeight.w600,  // 使用数字字重
-                    color: isDarkMode ? Colors.white : Colors.black,
+                  color: isDarkMode ? Colors.white : Colors.black87, // 优化文本颜色
                 ),
               ),
             ),
             SizedBox(height: 16.h),
+            
+            // 语言列表区域
             Container(
               constraints: BoxConstraints(maxHeight: 0.5.sh),
               child: SingleChildScrollView(
                 child: Column(
                   mainAxisSize: MainAxisSize.min,
-                    children:
+                  children: controller.supportedLanguages.keys.map((language) {
-                        controller.supportedLanguages.keys.map((language) {
+                    return Obx(() {
-                      return ListTile(
-                        title: Text(
-                          '${language}'.tr,
-                          style: TextStyle(
-                            color: isDarkMode ? Colors.white : Colors.black,
-                          ),
-                        ),
-                        trailing: Obx(() {
                       final currentLanguage = isSource
                           ? controller.sourceLanguage.value
                           : controller.targetLanguage.value;
-                          return currentLanguage == language
+                      final isSelected = currentLanguage == language;
-                              ? Icon(
+                      
-                                  Icons.check_circle,
+                      return GestureDetector(  // 改用手势检测器实现点击
-                                  color: isDarkMode
-                                      ? AppColors.primary
-                                      : Colors.blue,
-                                )
-                              : const SizedBox.shrink();
-                        }),
                         onTap: () {
                           if (isSource) {
                             controller.setSourceLanguage(language);
@@ -731,24 +719,87 @@ class TranslationView extends GetView<TranslationController> {
                           }
                           Get.back();
                         },
+                        child: Container(
+                          margin: EdgeInsets.only(bottom: 10.h),  // 添加项间距
+                          padding: EdgeInsets.all(10.w),  // 统一内边距
+                          decoration: BoxDecoration(
+                            color: isSelected  // 选中状态背景色
+                                ? (isDarkMode 
+                                    ? const Color(0xFF6200EE).withOpacity(0.2)
+                                    : Colors.blue.withOpacity(0.1))
+                                : (isDarkMode  // 未选中状态背景色
+                                    ? Colors.white.withOpacity(0.05)
+                                    : Colors.grey[200]!),
+                            borderRadius: BorderRadius.circular(12.r), // 项圆角
+                            border: Border.all(  // 选中状态边框
+                              color: isSelected
+                                  ? (isDarkMode 
+                                      ? const Color(0xFF6200EE)
+                                      : Colors.blue)
+                                  : (isDarkMode  // 未选中状态背景色
+                                    ? Colors.white.withOpacity(0.05)
+                                    : Colors.grey[200]!),
+                              width: 1,
+                            ),
+                          ),
+                          child: Row(
+                            children: [
+                              // 语言名称
+                              Expanded(
+                                child: Text(
+                                  language.tr,  
+                                  style: TextStyle(
+                                    fontSize: 16.sp,
+                                    fontWeight: FontWeight.w500,
+                                    color: isDarkMode 
+                                        ? Colors.white 
+                                        : Colors.black87,
+                                    overflow: TextOverflow.ellipsis,
+                                  ),
+                                ),
+                              ),
+                              // 选中指示器
+                              Container(
+                                width: 24.w,
+                                height: 24.w,
+                                decoration: BoxDecoration(
+                                  color: isSelected  // 动态颜色
+                                      ? (isDarkMode 
+                                          ? const Color(0xFF6200EE)
+                                          : Colors.blue)
+                                      : (isDarkMode 
+                                          ? Colors.white.withOpacity(0.1)
+                                          : Colors.grey[300]),
+                                  shape: BoxShape.circle,  // 圆形样式
+                                ),
+                                child: isSelected
+                                    ? Icon(  // 选中时显示对勾
+                                        Icons.check,
+                                        size: 16.w,
+                                        color: Colors.white,
+                                      )
+                                    : null,
+                              ),
+                            ],
+                          ),
+                        ),
                       );
+                    });
                   }).toList(),
                 ),
               ),
             ),
             SizedBox(height: 16.h),
+            
+            // 取消按钮
             Align(
               alignment: Alignment.centerRight,
-                child: Padding(
-                  padding: EdgeInsets.only(right: 24.w),
               child: TextButton(
                 onPressed: () => Get.back(),
                 child: Text(
-                      'cancel'.tr, // 取消
+                  'cancel'.tr,
                   style: TextStyle(
-                        color: isDarkMode ? AppColors.primary : Colors.blue,
+                    color: isDarkMode ? const Color(0xFF6200EE) : Colors.blue,
-                        fontSize: 16.sp,
-                      ),
                   ),
                 ),
               ),
@@ -758,7 +809,7 @@ class TranslationView extends GetView<TranslationController> {
       ),
     ),
   );
-  }
+}
 
   // 构建加载更多指示器
   Widget _buildLoadMoreIndicator() {
@@ -979,7 +1030,7 @@ class TranslationView extends GetView<TranslationController> {
 
       // 显示删除成功提示
       Get.snackbar(
-        '删除成功', // deleteSuccess
+        'success'.tr, // deleteSuccess
         '已删除该翻译记录', // deleteTranslationSuccess
         snackPosition: SnackPosition.BOTTOM,
         backgroundColor: Get.isDarkMode ? Colors.grey[800] : Colors.grey[200],
@@ -989,7 +1040,7 @@ class TranslationView extends GetView<TranslationController> {
     } catch (e) {
       // 显示删除失败提示
       Get.snackbar(
-        '删除失败', // deleteFailed
+        'error'.tr, // deleteFailed
         '删除翻译记录时发生错误: ${e.toString()}', // deleteTranslationError
         snackPosition: SnackPosition.BOTTOM,
         backgroundColor: Colors.red[400],