chore: 清理冗余代码并补全私信/搜索/故事/通知功能

- 删除未使用的空组件目录、死代码导出(clearAuth/calcDistance/COLORS/
  AVATAR_GRADIENTS/Message/TabBarItem/deletePost/uploadImage/getFileURL/
  _initLogin)，确保程序仍可正常运行
- 新增 8 个云函数并补全对应页面逻辑：getMessages/sendMessage(私信聊天)、
  getHotTopics/searchPosts/searchUsers(搜索)、getStory(故事，复用 posts
  集合)、getNotifications/markAllRead(基于点赞评论聚合的通知系统)
- 在 cloudbaserc.json 中注册全部新云函数，并通过 --deployMode zip 完成部署

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

cloudfunctions/searchPosts/index.js

@@ -0,0 +1,52 @@
+const cloud = require('wx-server-sdk')
+cloud.init({ env: cloud.DYNAMIC_CURRENT_ENV })
+const db = cloud.database()
+const _ = db.command
+const RESULT_LIMIT = 20
+
+function escapeRegExp(s) {
+  return String(s).replace(/[.*+?^${}()|[\]\\]/g, '\\$&')
+}
+
+exports.main = async (event, context) => {
+  const { OPENID } = cloud.getWXContext()
+  const keyword = String((event && event.keyword) || '').trim()
+  if (!keyword) return { code: 0, data: [] }
+
+  try {
+    const re = db.RegExp({ regexp: escapeRegExp(keyword), options: 'i' })
+    const postsRes = await db.collection('posts')
+      .where(_.or([{ content: re }, { hashtags: keyword }]))
+      .orderBy('createdAt', 'desc')
+      .limit(RESULT_LIMIT)
+      .get()
+
+    const posts = postsRes.data
+    if (posts.length === 0) return { code: 0, data: [] }
+
+    const authorIds = [...new Set(posts.map(p => p.authorId))]
+    const authorsRes = await db.collection('users')
+      .where({ openid: _.in(authorIds) })
+      .field({ nickName: true, avatarUrl: true, openid: true, pets: true, location: true })
+      .get()
+    const authorMap = {}
+    authorsRes.data.forEach(u => { authorMap[u.openid] = u })
+
+    const postIds = posts.map(p => p._id)
+    const likesRes = await db.collection('likes')
+      .where({ userId: OPENID, postId: _.in(postIds) })
+      .field({ postId: true })
+      .get()
+    const likedSet = new Set(likesRes.data.map(l => l.postId))
+
+    const enriched = posts.map(p => ({
+      ...p,
+      author: authorMap[p.authorId] || null,
+      isLiked: likedSet.has(p._id),
+    }))
+
+    return { code: 0, data: enriched }
+  } catch (e) {
+    return { code: -1, message: e.message }
+  }
+}

cloudfunctions/searchPosts/package.json

@@ -0,0 +1 @@
+{ "name": "searchPosts", "version": "1.0.0", "main": "index.js", "dependencies": { "wx-server-sdk": "~2.1.2" } }