refactor: standardize pagination response structure and enhance cursor handling

- Update various services and hooks to replace 'items' with 'list' for consistency in pagination responses.
- Modify PostRepository, commentService, groupService, messageService, and postService to align with the new response structure.
- Enhance cursor pagination logic in hooks and components to ensure proper handling of pagination states.
- Refactor HomeScreen, PostDetailScreen, SearchScreen, and other components to utilize the updated pagination structure.

src/services/messageService.ts

@@ -573,11 +573,17 @@ class MessageService {
         '/conversations/cursor',
         { params }
       );
-      return response.data;
+      const raw = response.data;
+      return {
+        list: Array.isArray(raw?.list) ? raw.list : [],
+        next_cursor: raw?.next_cursor ?? null,
+        prev_cursor: raw?.prev_cursor ?? null,
+        has_more: raw?.has_more ?? false,
+      };
     } catch (error) {
       console.error('获取会话列表失败:', error);
       return {
-        items: [],
+        list: [],
         next_cursor: null,
         prev_cursor: null,
         has_more: false,
@@ -596,15 +602,21 @@ class MessageService {
     params: CursorPaginationRequest = {}
   ): Promise<CursorPaginationResponse<MessageResponse>> {
     try {
-      const response = await api.get<CursorPaginationResponse<MessageResponse>>(
+      const response = await api.get<any>(
         `/conversations/${encodeURIComponent(conversationId)}/messages/cursor`,
         { params }
       );
-      return response.data;
+      const raw = response.data;
+      return {
+        list: Array.isArray(raw?.list) ? raw.list : [],
+        next_cursor: raw?.next_cursor ?? null,
+        prev_cursor: raw?.prev_cursor ?? null,
+        has_more: raw?.has_more ?? false,
+      };
     } catch (error) {
       console.error('获取消息列表失败:', error);
       return {
-        items: [],
+        list: [],
         next_cursor: null,
         prev_cursor: null,
         has_more: false,
@@ -631,32 +643,36 @@ class MessageService {
       
       const data = response.data;
       
-      // 兼容两种 API 响应格式
+      // 游标或带 page/total_pages 的分页（统一为 CursorPaginationResponse：list）
       if (data && typeof data === 'object') {
-        // 游标分页格式
-        if (Array.isArray(data.items)) {
+        const list = Array.isArray(data.list) ? data.list : null;
+        if (list) {
+          const isPageShape =
+            typeof data.page === 'number' &&
+            typeof data.total_pages === 'number' &&
+            data.next_cursor === undefined &&
+            data.prev_cursor === undefined;
+          if (isPageShape) {
+            const currentPage = data.page || 1;
+            const totalPages = data.total_pages || 1;
+            return {
+              list,
+              next_cursor: currentPage < totalPages ? String(currentPage + 1) : null,
+              prev_cursor: currentPage > 1 ? String(currentPage - 1) : null,
+              has_more: currentPage < totalPages,
+            };
+          }
           return {
-            items: data.items,
+            list,
             next_cursor: data.next_cursor ?? null,
             prev_cursor: data.prev_cursor ?? null,
             has_more: data.has_more ?? false,
           };
         }
-        // 传统分页格式 - 转换为游标格式
-        if (Array.isArray(data.list)) {
-          const currentPage = data.page || 1;
-          const totalPages = data.total_pages || 1;
-          return {
-            items: data.list,
-            next_cursor: currentPage < totalPages ? String(currentPage + 1) : null,
-            prev_cursor: currentPage > 1 ? String(currentPage - 1) : null,
-            has_more: currentPage < totalPages,
-          };
-        }
       }
-      
+
       return {
-        items: [],
+        list: [],
         next_cursor: null,
         prev_cursor: null,
         has_more: false,
@@ -664,7 +680,7 @@ class MessageService {
     } catch (error) {
       console.error('获取系统消息列表失败:', error);
       return {
-        items: [],
+        list: [],
         next_cursor: null,
         prev_cursor: null,
         has_more: false,