refactor(.umirc.ts): change proxy and request in dev mode and production mode

README.md

@@ -1,3 +1,36 @@
 # README
 
 `@umijs/max` 模板项目，更多功能参考 [Umi Max 简介](https://umijs.org/docs/max/introduce)
+
+## Language Switching
+
+- Lang toggle components (`src/components/switch/LangSwitches.tsx`, `src/components/LanguageSwitcher/index.tsx`) call Umi `setLocale(newLocale, false)` so content re-renders instantly without refreshing the page.
+- Both components listen for the browser `languagechange` event to keep their UI state in sync when another part of the app switches languages.
+- Strings are translated via `useTranslation`/`useIntl`; ensure new labels have entries in `src/locales/en-US.ts` and `src/locales/vi-VN.ts`.
+
+## Proxy & Request Profiles
+
+- Project uses two sets of configs under `config/`:
+  - `proxy.ts` + `Request.ts` for local development API targets.
+  - `proxy_prod.ts` + `request_prod.ts` for production-like targets.
+- The runtime selects configs automatically:
+  - `pnpm run dev` / any dev server run ⇒ `NODE_ENV=development` ⇒ uses dev proxy/request.
+  - `pnpm run build` (and other production builds) ⇒ `NODE_ENV=production` ⇒ uses prod proxy/request.
+- Override the environment by exporting `REACT_APP_ENV` before running commands (values: `dev`, `test`, `prod`). Example:
+
+```bash
+# Use test upstreams in a dev session
+REACT_APP_ENV=test pnpm run dev
+
+# Build with testing endpoints
+NODE_ENV=production REACT_APP_ENV=test pnpm run build
+```
+
+- `config/proxy_prod.ts` resolves targets dynamically based on the current hostname; adjust rules there if deployment hosts change.
+- `config/request_prod.ts` prepends the API base URL from `ApiConfigService`, while the dev file leaves relative paths untouched.
+
+## Verifying Builds
+
+- After switching language, confirm UI updates immediately and check console for `languagechange` events.
+- For proxy changes, inspect network requests in devtools to ensure they hit the expected environment.
+- Run `pnpm run build && pnpm serve` (or your hosting preview) to validate prod settings before deploying.