fix: 小程序/H5 API 地址指向错误导致登录失败

- .env.production VITE_PROD_API_HOST 从旧域名 aicc.yzrcloud.cn 改为
  zhiyinwx.yzrcloud.cn
- config.ts api() 函数增加 MP-WEIXIN 编译分支，小程序直接使用
  VITE_PROD_API_HOST，H5 保持同源请求

backend/playwright.config.js

@@ -0,0 +1,12 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+const test_1 = require("@playwright/test");
+exports.default = (0, test_1.defineConfig)({
+    testDir: './test',
+    testMatch: '*.browser.spec.ts',
+    timeout: 30000,
+    use: {
+        baseURL: 'http://localhost:3006',
+    },
+});
+//# sourceMappingURL=playwright.config.js.map