chore: 补全工程配置，部署云函数，建立数据库索引

- 新增 .gitignore（排除 node_modules、私有配置、编译产物）
- 新增 cloudbaserc.json，绑定云环境 cloud1-d4g697lte499543d8
- project.config.json：补 miniprogramRoot、开启 useCompilerPlugins typescript，修复预览报 app.json 找不到的问题
- tsconfig.json：移除无效 typeRoots，解除 TypeScript 编译阻断
- miniprogram/app.json：移除 glass-easel（需基础库 3.x，兼容性差）
- miniprogram/utils/constants.ts：填入真实云环境 ID
- cloudfunctions/updateLocation：位置字段改用 GeoPoint 以支持地理索引
- cloudfunctions/getNearbyPets：改用 geoNear 聚合管道，支持真实距离排序

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

cloudbaserc.json

@@ -0,0 +1,63 @@
+{
+  "$schema": "https://static.cloudbase.net/cli/cloudbaserc.schema.json",
+  "envId": "cloud1-d4g697lte499543d8",
+  "functionRoot": "cloudfunctions",
+  "functions": [
+    {
+      "name": "login",
+      "timeout": 10,
+      "runtime": "Nodejs20.19",
+      "handler": "index.main",
+      "description": "微信登录 & 用户注册"
+    },
+    {
+      "name": "createPost",
+      "timeout": 15,
+      "runtime": "Nodejs20.19",
+      "handler": "index.main",
+      "description": "发布帖子"
+    },
+    {
+      "name": "getPosts",
+      "timeout": 10,
+      "runtime": "Nodejs20.19",
+      "handler": "index.main",
+      "description": "获取信息流帖子列表"
+    },
+    {
+      "name": "getPost",
+      "timeout": 10,
+      "runtime": "Nodejs20.19",
+      "handler": "index.main",
+      "description": "获取单条帖子详情"
+    },
+    {
+      "name": "likePost",
+      "timeout": 10,
+      "runtime": "Nodejs20.19",
+      "handler": "index.main",
+      "description": "点赞 / 取消点赞"
+    },
+    {
+      "name": "getNearbyPets",
+      "timeout": 15,
+      "runtime": "Nodejs20.19",
+      "handler": "index.main",
+      "description": "附近宠物地理位置查询"
+    },
+    {
+      "name": "updateLocation",
+      "timeout": 10,
+      "runtime": "Nodejs20.19",
+      "handler": "index.main",
+      "description": "更新用户地理位置（GeoPoint）"
+    },
+    {
+      "name": "sendGreeting",
+      "timeout": 10,
+      "runtime": "Nodejs20.19",
+      "handler": "index.main",
+      "description": "打招呼 / 发起私信"
+    }
+  ]
+}