feat(wechat): switch from H5 to Native payment (QR code scan)

- Change API endpoint from /v3/pay/transactions/h5 to /v3/pay/transactions/native
- Remove scene_info (not needed for native mode)
- Return code_url instead of h5_url
- recharge.dspy: display QR code image via api.qrserver.com
- user_recharge.dspy: return both code_url and qr_url

unipay/providers/wechat.py

@@ -143,7 +143,7 @@ class WechatGateway(Gateway):
 	# -----------------------------------------------------
 	async def create_payment(self, payload: Dict[str, Any]) -> str:
 		"""
-		H5 下单（默认 H5，可改为 jsapi/native）
+		Native 下单（扫码支付）
 		"""
 		body = {
 			"appid": self.appid,
@@ -154,15 +154,11 @@ class WechatGateway(Gateway):
 			"amount": {
 				"total": int(payload["amount"]),
 				"currency": payload.get("currency", "CNY")
-			},
-			"scene_info": {
-				"payer_client_ip": payload.get("client_ip", "127.0.0.1"),
-				"h5_info": {"type": "Wap"}
 			}
 		}
 		body_str = json.dumps(body, ensure_ascii=False)
 
-		url_path = "/v3/pay/transactions/h5"
+		url_path = "/v3/pay/transactions/native"
 		url = WECHAT_API_BASE + url_path
 		auth = self._sign("POST", url_path, body_str)
 
@@ -176,10 +172,10 @@ class WechatGateway(Gateway):
 					err_code = ret.get("code", "UNKNOWN")
 					err_msg = ret.get("message", str(ret))
 					raise Exception(f"WeChat API error (HTTP {resp.status}): [{err_code}] {err_msg}")
-				h5_url = ret.get("h5_url")
-				if not h5_url:
-					raise Exception(f"WeChat API response missing h5_url: {json.dumps(ret, ensure_ascii=False)}")
-				return h5_url
+				code_url = ret.get("code_url")
+				if not code_url:
+					raise Exception(f"WeChat Native API response missing code_url: {json.dumps(ret, ensure_ascii=False)}")
+				return code_url
 
 	# -----------------------------------------------------
 	async def refund(self, payload: Dict[str, Any]) -> Dict[str, Any]:

wwwroot/recharge.dspy

@@ -1,13 +1,15 @@
+import urllib.parse
 params_kw.amount = float(params_kw.amount)
 debug(f'recharge.dspy: {params_kw=}')
 try:
-	url = await create_payment(request, params_kw)
+	code_url = await create_payment(request, params_kw)
+	qr_img_url = 'https://api.qrserver.com/v1/create-qr-code/?size=280x280&data=' + urllib.parse.quote(code_url, safe='')
 	return {
 		"widgettype":"NewWindow",
 		"options":{
-			"url": url,
-			"height": "100%",
-			"width":"100%"
+			"url": qr_img_url,
+			"height": "340",
+			"width":"340"
 		}
 	}
 except Exception as e:

wwwroot/user_recharge.dspy

@@ -1,3 +1,4 @@
+import urllib.parse
 if params_kw.amount is None:
 	return {
 		"status": "error",
@@ -20,14 +21,16 @@ if params_kw.currency != 'CNY':
 		}
 	}
 params_kw.amount = float(params_kw.amount)
-debug(f'recharge.dspy: {params_kw=}')
+debug(f'user_recharge.dspy: {params_kw=}')
 
 try:
 	url = await create_payment(request, params_kw)
+	qr_url = 'https://api.qrserver.com/v1/create-qr-code/?size=280x280&data=' + urllib.parse.quote(url, safe='')
 	return {
 		"status": "ok",
 		"data": {
-			"url": url
+			"code_url": url,
+			"qr_url": qr_url
 		}
 	}
 except Exception as e: