fix: correct community category migration rank

docs/sql/create_community_post_categories.sql

@@ -124,12 +124,12 @@ INNER JOIN (
       ROW_NUMBER() OVER (
         PARTITION BY post_tag.`post_id`
         ORDER BY tag.`sort` DESC, post_tag.`id` ASC
-      ) AS row_number
+      ) AS `post_rank`
     FROM `la_community_post_tag` post_tag
     INNER JOIN `la_community_tag` tag ON tag.`id` = post_tag.`tag_id`
     INNER JOIN `la_community_post_category` category ON category.`id` = post_tag.`tag_id`
   ) ranked
-  WHERE ranked.row_number = 1
+  WHERE ranked.`post_rank` = 1
 ) selected_category ON selected_category.`post_id` = post.`id`
 SET post.`category_id` = selected_category.`category_id`
 WHERE post.`category_id` = 0;

docs/superpowers/plans/2026-08-02-community-post-channels-and-categories.md

@@ -151,7 +151,7 @@ communityPostSetCategory({ id, category_id })
 
 检查管理端请求失败回滚、权限标识、选择器数值类型、分页筛选参数和用户端频道切换请求，确认不存在客户端分页内伪排序或未使用导入。
 
-- [ ] **Step 3: 提交源码**
+- [x] **Step 3: 提交源码**
 
 只暂存本任务文件，排除工作区原有 `AGENTS.md` 和共享文档混合改动，提交信息：
 
@@ -159,7 +159,7 @@ communityPostSetCategory({ id, category_id })
 feat: add community post categories and channels
 ```
 
-- [ ] **Step 4: 同步测试服并应用数据库初始化**
+- [x] **Step 4: 同步测试服并应用数据库初始化**
 
 先执行项目规定部署命令：