chore(prod): 移除全部社区/社交相关前端代码（过审用）

- 删除页面：community（社区）、comments（评论）、user（他人主页）、relations（关注/粉丝）
- app.json 去掉四个页面注册与社区 tab；tabBar 只剩 首页/报告/我的
- bottom-sheet 移除发帖(createPost)与评论(comments)整块 UI 及对应 JS/数据/常量
- profile-head 移除帖子/关注/粉丝社交数与关注按钮
- mine 去掉「我的帖子」「别人眼里的我」及关注/粉丝跳转
- api.js 移除 posts/comments/follow/relations 等社区接口（保留 userCard 供我的页头部）

说明：后端社区接口未动（微信审核只看小程序包，前端已无任何引用）；
完整社区代码保留在 feat/dev 分支与 git 历史。

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

pets-fe/utils/api.js

@@ -125,27 +125,8 @@ const api = {
   healthSummary: (id) => request({ url: `/api/pets/${id}/health-summary` }),
   getPoster: (id) => request({ url: `/api/pets/${id}/poster` }),
 
-  // 社区
-  listPosts: (tab, page) =>
-    request({ url: `/api/posts?tab=${encodeURIComponent(tab || '')}&page=${page || 1}&page_size=10` }),
-  createPost: (body) => request({ url: '/api/posts', method: 'POST', data: body }),
-  likePost: (id) => request({ url: `/api/posts/${id}/like`, method: 'POST' }),
+  // 个人主页卡片（「我的」页头部用；社区/关注已下线）
   userCard: (userId) => request({ url: `/api/users/${userId}/profile` }),
-  userPosts: (userId, page) => request({ url: `/api/users/${userId}/posts?page=${page || 1}&page_size=10` }),
-  relations: (userId, kind, page) =>
-    request({ url: `/api/users/${userId}/relations?kind=${kind}&page=${page || 1}&page_size=20` }),
-  followUser: (userId) => request({ url: `/api/users/${userId}/follow`, method: 'POST' }),
-  unfollowUser: (userId) => request({ url: `/api/users/${userId}/follow`, method: 'DELETE' }),
-  deletePost: (id) => request({ url: `/api/posts/${id}`, method: 'DELETE' }),
-  deleteComment: (id) => request({ url: `/api/comments/${id}`, method: 'DELETE' }),
-  listComments: (id) => request({ url: `/api/posts/${id}/comments` }),
-  createComment: (id, content, images, parentId) =>
-    request({
-      url: `/api/posts/${id}/comments`,
-      method: 'POST',
-      data: { content, images: images || [], parent_id: parentId || '' },
-    }),
-  listReplies: (commentId) => request({ url: `/api/comments/${commentId}/replies` }),
 
   // 文章
   listArticles: () => request({ url: '/api/articles' }),