feat: 初始化考培练系统项目

- 从服务器拉取完整代码
- 按框架规范整理项目结构
- 配置 Drone CI 测试环境部署
- 包含后端(FastAPI)、前端(Vue3)、管理端

技术栈: Vue3 + TypeScript + FastAPI + MySQL

backend/app/services/ai/coze/exceptions.py

@@ -0,0 +1,101 @@
+"""
+Coze 服务异常定义
+"""
+
+from typing import Optional, Dict, Any
+
+
+class CozeException(Exception):
+    """Coze 服务基础异常"""
+
+    def __init__(
+        self,
+        message: str,
+        code: Optional[str] = None,
+        status_code: Optional[int] = None,
+        details: Optional[Dict[str, Any]] = None,
+    ):
+        super().__init__(message)
+        self.message = message
+        self.code = code
+        self.status_code = status_code
+        self.details = details or {}
+
+
+class CozeAuthError(CozeException):
+    """认证异常"""
+
+    pass
+
+
+class CozeAPIError(CozeException):
+    """API 调用异常"""
+
+    pass
+
+
+class CozeRateLimitError(CozeException):
+    """速率限制异常"""
+
+    pass
+
+
+class CozeTimeoutError(CozeException):
+    """超时异常"""
+
+    pass
+
+
+class CozeStreamError(CozeException):
+    """流式响应异常"""
+
+    pass
+
+
+def map_coze_error_to_exception(error: Exception) -> CozeException:
+    """
+    将 Coze SDK 错误映射为统一异常
+
+    Args:
+        error: 原始异常
+
+    Returns:
+        CozeException: 映射后的异常
+    """
+    error_message = str(error)
+
+    # 根据错误消息判断错误类型
+    if (
+        "authentication" in error_message.lower()
+        or "unauthorized" in error_message.lower()
+    ):
+        return CozeAuthError(
+            message="Coze 认证失败",
+            code="COZE_AUTH_ERROR",
+            status_code=401,
+            details={"original_error": error_message},
+        )
+
+    if "rate limit" in error_message.lower():
+        return CozeRateLimitError(
+            message="Coze API 速率限制",
+            code="COZE_RATE_LIMIT",
+            status_code=429,
+            details={"original_error": error_message},
+        )
+
+    if "timeout" in error_message.lower():
+        return CozeTimeoutError(
+            message="Coze API 调用超时",
+            code="COZE_TIMEOUT",
+            status_code=504,
+            details={"original_error": error_message},
+        )
+
+    # 默认映射为 API 错误
+    return CozeAPIError(
+        message="Coze API 调用失败",
+        code="COZE_API_ERROR",
+        status_code=500,
+        details={"original_error": error_message},
+    )