---
id: survey-app-shell
name: 应用外壳与折叠屏布局
area: rn-app
status: planned
---

## 概述

React Native (Expo SDK 52 + Expo Router) 应用骨架，实现 Z Fold 6 折叠/展开双形态布局切换。折叠时单栏显示，展开时左侧地图 + 右侧表单双栏并排。

## 任务卡

### 📋 Expo 应用骨架初始化
- status: todo
- complexity: M
- files: apps/property-survey/app.json, apps/property-survey/package.json, apps/property-survey/app/_layout.tsx, apps/property-survey/app/index.tsx, apps/property-survey/app/summary.tsx
- depends: local-data-layer
- acceptance: `pnpm --filter property-survey start` 能在 Expo Go 或开发构建中启动，底部导航可在「登记」和「汇总」两个页面间切换，SQLite 数据库在启动时完成初始化

### 📋 折叠屏状态感知 Hook
- status: todo
- complexity: S
- files: apps/property-survey/src/layout/useFoldState.ts
- acceptance: useFoldState 返回 `{ isUnfolded: boolean, windowWidth: number }`，以 720px 为断点区分折叠/展开状态，useWindowDimensions 变化时自动更新，在模拟器宽度调整时可观察到状态切换

### 📋 双栏/单栏自适应布局容器
- status: todo
- complexity: M
- files: apps/property-survey/src/layout/FoldableLayout.tsx
- depends: survey-app-shell
- acceptance: 展开时渲染左右两栏（左侧 flexGrow:1 地图区，右侧 380px 详情区），折叠时只渲染左侧（地图全屏），接受 `left` 和 `right` 两个 ReactNode 插槽

### 📋 楼层切换标签组件
- status: todo
- complexity: S
- files: apps/property-survey/src/layout/FloorTabs.tsx
- depends: survey-app-shell
- acceptance: 显示 1F / 2F / 3F 三个标签，选中项高亮，onChange 回调传出当前楼层数字（1/2/3），组件宽度自适应容器