refactor(translation): 优化翻译中间件视图布局结构

- 移除冗余的Padding和Column包装，直接使用GridView作为body
- 调整网格子项的内边距和宽高比例
- 优化卡片内部布局，使用Spacer替代固定间距

lib/modules/translation/middleware/views/translation_middleware_view.dart

@@ -15,6 +15,7 @@ class TranslationMiddlewareView
     final isDarkMode = Theme.of(context).brightness == Brightness.dark;
 
     return Scaffold(
+      //primary: false,
       backgroundColor: isDarkMode ? AppColors.darkBackground : Colors.grey[50],
       appBar: _buildAppBar(isDarkMode),
       body: _buildBody(isDarkMode),
@@ -49,29 +50,19 @@ class TranslationMiddlewareView
   /// 构建主体内容
   Widget _buildBody(bool isDarkMode) {
     return SafeArea(
-      child: Padding(
+      child: _buildTranslationOptionsGrid(isDarkMode),
-        padding: EdgeInsets.all(20.w),
-        child: Column(
-          crossAxisAlignment: CrossAxisAlignment.start,
-          children: [
-            // 翻译功能选项网格
-            Expanded(
-              child: _buildTranslationOptionsGrid(isDarkMode),
-            ),
-          ],
-        ),
-      ),
     );
   }
 
   /// 构建翻译选项网格
   Widget _buildTranslationOptionsGrid(bool isDarkMode) {
     return GridView.builder(
+      padding: EdgeInsets.all(20.w), // 将内边距应用于网格内容
       gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
         crossAxisCount: 2,
         crossAxisSpacing: 16.w,
         mainAxisSpacing: 16.h,
-        childAspectRatio: 0.85,
+        childAspectRatio: 1,
       ),
       itemCount: controller.translationOptions.length,
       itemBuilder: (context, index) {
@@ -120,9 +111,9 @@ class TranslationMiddlewareView
           ],
         ),
         child: Padding(
-          padding: EdgeInsets.all(20.w),
+          padding: EdgeInsets.fromLTRB(20.w, 28.h, 20.w, 20.h),
           child: Column(
-            mainAxisAlignment: MainAxisAlignment.center,
+            mainAxisAlignment: MainAxisAlignment.start,
             children: [
               // 图标
               Container(
@@ -138,7 +129,8 @@ class TranslationMiddlewareView
                   color: option.iconColor.withOpacity(isEnabled ? 1.0 : 0.5),
                 ),
               ),
-              SizedBox(height: 16.h),
+
+              const Spacer(),
 
               // 标题
               Text(