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>

server.mjs

@@ -1097,7 +1097,9 @@ app.post('/auth/billing/recharge-orders', jsonBody, async (req, res) => {
   const me = await userAuth.getMe(userToken(req));
   if (!me) return res.status(401).json({ message: '未登录' });
   const amountCents = Number(req.body?.amountCents);
-  const payScene = req.body?.payScene === 'h5' ? 'h5' : 'native';
+  const payScene = ['native', 'h5', 'jsapi'].includes(req.body?.payScene)
+    ? req.body.payScene
+    : 'native';
   const result = await rechargeService.createOrder({
     userId: me.id,
     amountCents,