Add WeChat in-app JSAPI recharge for g2.tkmind.cn.

Use JSAPI with bound openid inside WeChat instead of QR long-press, and include related auth redirect and admin UX fixes.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/utils/wechatPay.ts

@@ -0,0 +1,49 @@
+import type { JsapiPayParams } from '../types';
+
+type WeixinJsBridge = {
+  invoke(
+    api: 'getBrandWCPayRequest',
+    params: JsapiPayParams,
+    callback: (result: { err_msg?: string }) => void,
+  ): void;
+};
+
+declare global {
+  interface Window {
+    WeixinJSBridge?: WeixinJsBridge;
+  }
+}
+
+export function isWeChatBrowser() {
+  return /MicroMessenger/i.test(navigator.userAgent);
+}
+
+export function invokeWechatJsapiPay(params: JsapiPayParams): Promise<'ok' | 'cancel'> {
+  return new Promise((resolve, reject) => {
+    const invoke = () => {
+      const bridge = window.WeixinJSBridge;
+      if (!bridge) {
+        reject(new Error('当前环境不支持微信支付，请在微信内打开'));
+        return;
+      }
+      bridge.invoke('getBrandWCPayRequest', params, (result) => {
+        const message = result.err_msg ?? '';
+        if (message === 'get_brand_wcpay_request:ok') {
+          resolve('ok');
+          return;
+        }
+        if (message === 'get_brand_wcpay_request:cancel') {
+          resolve('cancel');
+          return;
+        }
+        reject(new Error(message || '微信支付失败'));
+      });
+    };
+
+    if (typeof window.WeixinJSBridge === 'undefined') {
+      document.addEventListener('WeixinJSBridgeReady', invoke, { once: true });
+      return;
+    }
+    invoke();
+  });
+}