revert: QR code is required for Native payment, weixin:// is not a web URL

Native payment code_url uses weixin:// protocol which is a WeChat deep link,
not openable in browsers. QR code is the standard approach - user scans
with WeChat and completes payment within the app.

wwwroot/recharge.dspy

@@ -1,15 +1,15 @@
+import urllib.parse
 params_kw.amount = float(params_kw.amount)
 debug(f'recharge.dspy: {params_kw=}')
 try:
 	code_url = await create_payment(request, params_kw)
-	# weixin://wxpay/bizpayurl?pr=xxx → https://wx.tenpay.com/f2f?pr=xxx
-	pay_url = code_url.replace('weixin://wxpay/bizpayurl', 'https://wx.tenpay.com/f2f')
+	qr_url = 'https://api.qrserver.com/v1/create-qr-code/?size=280x280&data=' + urllib.parse.quote(code_url, safe='')
 	return {
 		"widgettype":"NewWindow",
 		"options":{
-			"url": pay_url,
-			"height": "100%",
-			"width":"100%"
+			"url": qr_url,
+			"height": "340",
+			"width":"340"
 		}
 	}
 except Exception as e: