fix: 修复评论/资料/导航胶囊/宠物档案/定位等多处问题，补全相关云函数

- 新增 addComment/getComments/getFollowList/followUser/getUser/updateProfile/updatePet/deletePet 云函数并完成部署
- 统一通过 app.globalData.navBarInfo 避让系统胶囊按钮（编辑资料/编辑宠物等页面保存按钮被遮挡问题）
- 编辑资料页所在城市改为省份 picker 选择
- 修复"我的"页动态为空（getUserPosts 应传 openid 而非数据库 _id）
- 重构编辑宠物页：品种改用 picker 滚轮（替代有数量上限的 actionSheet），标签改用 selectedTagSet 映射 + 自定义标签输入（5字以内、仅中英文/数字、最多8个）
- 接通宠物保存/删除真实云函数调用并同步本地缓存
- 移除 feed 页对不存在的 getStories 云函数调用，修复模拟器卡死
- 移除 post 页对不存在的 wx.reverseGeocoder API 的调用
- 统一扩展 AppGlobalData 类型并修正所有 getApp 调用的泛型，解决 TS 报错

miniprogram/components/post-card/post-card.ts

@@ -14,6 +14,7 @@ Component({
     avatarGradient: '',
     timeText: '',
     likeCount: 0,
+    imageGridClass: 'post-img-grid-0',
   },
 
   observers: {
@@ -22,20 +23,25 @@ Component({
       this.setData({
         avatarGradient: getAvatarGradient(val.authorId || ''),
         timeText: formatTime(val.createdAt),
-        likeCount: val.likeCount,
+        likeCount: typeof val.likeCount === 'number' ? val.likeCount : 0,
+        imageGridClass: this.getImageGridClass(val.images),
       })
     },
   },
 
   methods: {
+    getImageGridClass(images?: string[]) {
+      if (!Array.isArray(images)) return 'post-img-grid-0'
+      return `post-img-grid-${images.length > 3 ? 'multi' : images.length}`
+    },
+
     onCardTap() {
       const post = this.data.post as Post
       if (!post) return
       wx.navigateTo({ url: `/pages/post-detail/post-detail?id=${post._id}` })
     },
 
-    onAuthorTap(e: WechatMiniprogram.CustomEvent) {
-      e.stopPropagation()
+    onAuthorTap() {
       const post = this.data.post as Post
       if (!post?.authorId) return
       wx.navigateTo({ url: `/pages/pet-detail/pet-detail?userId=${post.authorId}` })
@@ -50,8 +56,7 @@ Component({
       })
     },
 
-    async onLike(e: WechatMiniprogram.CustomEvent) {
-      e.stopPropagation()
+    async onLike() {
       const post = this.data.post as Post
       if (!post) return
       const wasLiked = post.isLiked
@@ -72,15 +77,13 @@ Component({
       }
     },
 
-    onComment(e: WechatMiniprogram.CustomEvent) {
-      e.stopPropagation()
+    onComment() {
       const post = this.data.post as Post
       if (!post) return
       wx.navigateTo({ url: `/pages/post-detail/post-detail?id=${post._id}&focus=comment` })
     },
 
-    onShare(e: WechatMiniprogram.CustomEvent) {
-      e.stopPropagation()
+    onShare() {
       wx.showShareMenu({ withShareTicket: true, menus: ['shareAppMessage', 'shareTimeline'] })
     },
   },