feat: split DA and API layers by domain, add parallel route docs

src/utils/store/keys.ts

@@ -0,0 +1,35 @@
+import Taro from '@tarojs/taro'
+
+/** 当前登录用户信息在 Storage 中的 key */
+export const USER_KEY = 'smart_user_info'
+/** 当前激活 openid 在 Storage 中的 key */
+export const ACTIVE_USER_KEY = 'smart_active_openid'
+
+/** 判断 openid 是否为历史版 mock 残留（形如 mock_xxx） */
+export function isMockOpenid(openid?: string | null): boolean {
+  return !!openid && (openid.startsWith('mock_') || openid.startsWith('mock-'))
+}
+
+/** 取当前用户 openid；没有登录态时回退 _guest_ 并缓存 */
+function getActiveOpenid(): string {
+  let user: any = null
+  try {
+    user = Taro.getStorageSync(USER_KEY)
+  } catch {
+    user = null
+  }
+  const openid = user?.openid || Taro.getStorageSync(ACTIVE_USER_KEY) || '_guest_'
+  Taro.setStorageSync(ACTIVE_USER_KEY, openid)
+  return openid
+}
+
+/** 按当前用户生成作用域 storage key */
+export function key(scope: string): string {
+  const prefix = getActiveOpenid()
+  return `${scope}_${prefix}`
+}
+
+/** 按指定 openid 生成作用域 storage key */
+export function keyFor(scope: string, openid: string): string {
+  return `${scope}_${openid}`
+}