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/types/dto.ts

@@ -489,7 +489,7 @@ export interface CursorPaginationRequest {
  */
 export interface CursorPaginationResponse<T> {
   /** 数据项列表 */
-  items: T[];
+  list: T[];
   /** 下一页游标 */
   next_cursor: string | null;
   /** 上一页游标 */