refactor: migrate demo applications to playground (#4116)

* chore: detail adjustment

* refactor: Migrate demo applications to playground

* perf: logic optimization

* chore: update docs

* chore: update docs

playground/src/api/core/auth.ts

@@ -0,0 +1,33 @@
+import { requestClient } from '#/api/request';
+
+export namespace AuthApi {
+  /** 登录接口参数 */
+  export interface LoginParams {
+    password: string;
+    username: string;
+  }
+
+  /** 登录接口返回值 */
+  export interface LoginResult {
+    accessToken: string;
+    desc: string;
+    realName: string;
+    refreshToken: string;
+    userId: string;
+    username: string;
+  }
+}
+
+/**
+ * 登录
+ */
+export async function loginApi(data: AuthApi.LoginParams) {
+  return requestClient.post<AuthApi.LoginResult>('/auth/login', data);
+}
+
+/**
+ * 获取用户权限码
+ */
+export async function getAccessCodesApi() {
+  return requestClient.get<string[]>('/auth/codes');
+}