feat: add new assets, optimize list layout and重构个人中心页面

1. 新增fork/star/close等多个业务图标并配置到静态资源路径
2. 新增静态资源CDN配置常量
3. 优化帖子列表加载更多UI，无更多数据时显示提示文本
4. 重构我的页面布局，对齐Vue端实现，替换图标为CDN资源
5. 统一退出登录弹窗为公共组件，调整代码格式与缩进

lib/features/class/widgets/post_list_body.dart

@@ -34,7 +34,8 @@ class PostListBody extends ConsumerStatefulWidget {
     required int pageIndex,
     required int pageSize,
     required int prevPageId,
-  }) fetchPage;
+  })
+  fetchPage;
 
   final String emptyText;
   final bool removeOnUnlike;
@@ -233,16 +234,30 @@ class _PostListBodyState extends ConsumerState<PostListBody> {
         controller: _scrollController,
         physics: const AlwaysScrollableScrollPhysics(),
         padding: EdgeInsets.symmetric(horizontal: 14.w),
-        itemCount: _posts.length + (_hasMore ? 1 : 0),
+        itemCount: _posts.length + 1,
         itemBuilder: (context, index) {
           if (index >= _posts.length) {
+            if (_hasMore) {
+              return Padding(
+                padding: EdgeInsets.symmetric(vertical: 16.h),
+                child: const Center(
+                  child: SizedBox(
+                    width: 22,
+                    height: 22,
+                    child: CircularProgressIndicator(strokeWidth: 2.5),
+                  ),
+                ),
+              );
+            }
             return Padding(
-              padding: EdgeInsets.symmetric(vertical: 16.h),
-              child: const Center(
-                child: SizedBox(
-                  width: 22,
-                  height: 22,
-                  child: CircularProgressIndicator(strokeWidth: 2.5),
+              padding: EdgeInsets.symmetric(vertical: 20.h),
+              child: Center(
+                child: Text(
+                  '没有更多了',
+                  style: TextStyle(
+                    fontSize: 12.sp,
+                    color: const Color(0xFFB4C2E0),
+                  ),
                 ),
               ),
             );
@@ -262,4 +277,4 @@ class _PostListBodyState extends ConsumerState<PostListBody> {
       ),
     );
   }
-}
+}