feat(user): 新增收货地址管理及售后申请页面

- 新增地址类型定义，增强前端地址数据结构
- 新增地址编辑页面，支持地址智能识别和定位选点功能
- 地址编辑支持省市区选择及默认地址设置
- 新增地址列表页面，支持地址展示、删除、编辑和选择功能
- 实现售后申请页面，支持选择售后类型和退款原因
- 售后申请支持商品选择、退款金额计算和凭证上传
- 新增售后详情页面，支持售后状态展示及申请取消
- 优化页面加载和用户交互体验，增加错误提示和权限处理

src_bak/app.tsx

@@ -0,0 +1,56 @@
+import React, { useState } from 'react'
+import Taro, { useLaunch, useDidShow, useDidHide, getSystemInfoSync } from '@tarojs/taro'
+import { View } from '@tarojs/components'
+import { ConfigProvider } from '@nutui/nutui-react-taro'
+import zhCN from '@nutui/nutui-react-taro/dist/locales/zh-CN'
+import AppContext from './contexts/AppContext'
+import { UserProvider } from './contexts/UserContext'
+import { CartProvider } from './contexts/CartContext'
+import ErrorBoundary from './components/ErrorBoundary'
+import './app.scss'
+
+type AppProps = {
+  children?: React.ReactNode
+}
+
+function App(props: AppProps) {
+  const [theme, setTheme] = useState<'light' | 'dark'>('light')
+
+  useLaunch(() => {
+    const systemInfo = getSystemInfoSync()
+    const savedTheme = Taro.getStorageSync('app_theme')
+    if (savedTheme === 'light' || savedTheme === 'dark') {
+      setTheme(savedTheme)
+    }
+  })
+
+  useDidShow(() => {})
+
+  useDidHide(() => {})
+
+  const toggleTheme = () => {
+    setTheme(prev => {
+      const next = prev === 'light' ? 'dark' : 'light'
+      try { Taro.setStorageSync('app_theme', next) } catch { /* ignore */ }
+      return next
+    })
+  }
+
+  return (
+    <AppContext.Provider value={{ theme, toggleTheme }}>
+      <UserProvider>
+        <CartProvider>
+          <ConfigProvider locale={zhCN}>
+            <ErrorBoundary>
+              <View className={theme === 'dark' ? 'dark' : ''}>
+                {props.children}
+              </View>
+            </ErrorBoundary>
+          </ConfigProvider>
+        </CartProvider>
+      </UserProvider>
+    </AppContext.Provider>
+  )
+}
+
+export default App