Merge branch 'refactor/backend-architecture' into development

api/app/features/payment/payment_exceptions.py

@@ -0,0 +1,28 @@
+"""支付模块异常定义（从 payment 迁入 app）"""
+
+
+class PaymentError(Exception):
+    def __init__(self, message: str = "支付异常", code: str = "PAYMENT_ERROR"):
+        self.message = message
+        self.code = code
+        super().__init__(self.message)
+
+
+class PaymentConfigError(PaymentError):
+    def __init__(self, message: str = "支付配置错误"):
+        super().__init__(message=message, code="PAYMENT_CONFIG_ERROR")
+
+
+class PaymentCreateError(PaymentError):
+    def __init__(self, message: str = "创建支付订单失败"):
+        super().__init__(message=message, code="PAYMENT_CREATE_ERROR")
+
+
+class PaymentNotifyError(PaymentError):
+    def __init__(self, message: str = "支付回调处理失败"):
+        super().__init__(message=message, code="PAYMENT_NOTIFY_ERROR")
+
+
+class PaymentQueryError(PaymentError):
+    def __init__(self, message: str = "查询支付状态失败"):
+        super().__init__(message=message, code="PAYMENT_QUERY_ERROR")