增加支付宝支付相关页面和程序

video-gen-api/app/schemas/payment.py

@@ -3,6 +3,7 @@ from pydantic import BaseModel
 
 class RechargeRequest(BaseModel):
     plan: str  # package id
+    method: str = "wechat"  # "wechat" or "alipay"
 
 
 class PaymentOrderOut(BaseModel):
@@ -12,5 +13,6 @@ class PaymentOrderOut(BaseModel):
     credits: float
     payment_method: str
     status: str
+    qr_url: str | None = None  # Alipay QR code URL (transient, not persisted)
 
     model_config = {"from_attributes": True}