feat(email_service): Add dynamic email provider configuration support

- Import EMAIL_PROVIDER from config at runtime in unified functions to enable dynamic provider switching
- Update unified_generate_email() to fetch current provider configuration on each call
- Update unified_create_email() to fetch current provider configuration on each call
- Update unified_get_verification_code() to fetch current provider configuration on each call
- Update unified_fetch_emails() to fetch current provider configuration on each call
- Update fallback comments to reflect support for both KYX and Cloud Mail systems
- Allows email provider to be switched without restarting the application

email_service.py

@@ -632,7 +632,10 @@ def unified_generate_email() -> str:
     Returns:
         str: 邮箱地址
     """
-    if EMAIL_PROVIDER == "gptmail":
+    # 每次调用时重新获取配置，支持动态切换
+    from config import EMAIL_PROVIDER as current_provider
+    
+    if current_provider == "gptmail":
         # 生成随机前缀 + oaiteam 后缀，确保不重复
         random_str = ''.join(random.choices(string.ascii_lowercase + string.digits, k=8))
         prefix = f"{random_str}-oaiteam"
@@ -642,7 +645,7 @@ def unified_generate_email() -> str:
             return email
         log.warning(f"GPTMail 生成失败，回退到 KYX: {error}")
 
-    # 默认使用 KYX 系统
+    # 默认使用 KYX / Cloud Mail 系统
     return generate_random_email()
 
 
@@ -652,7 +655,10 @@ def unified_create_email() -> tuple[str, str]:
     Returns:
         tuple: (email, password)
     """
-    if EMAIL_PROVIDER == "gptmail":
+    # 每次调用时重新获取配置，支持动态切换
+    from config import EMAIL_PROVIDER as current_provider
+    
+    if current_provider == "gptmail":
         # 生成随机前缀 + oaiteam 后缀，确保不重复
         random_str = ''.join(random.choices(string.ascii_lowercase + string.digits, k=8))
         prefix = f"{random_str}-oaiteam"
@@ -663,7 +669,7 @@ def unified_create_email() -> tuple[str, str]:
             return email, DEFAULT_PASSWORD
         log.warning(f"GPTMail 生成失败，回退到 KYX: {error}")
 
-    # 默认使用 KYX 系统
+    # 默认使用 KYX / Cloud Mail 系统
     email = generate_random_email()
     success, msg = create_email_user(email, DEFAULT_PASSWORD)
     if success or "已存在" in msg:
@@ -682,10 +688,13 @@ def unified_get_verification_code(email: str, max_retries: int = None, interval:
     Returns:
         tuple: (code, error, email_time) - 验证码、错误信息、邮件时间
     """
-    if EMAIL_PROVIDER == "gptmail":
+    # 每次调用时重新获取配置，支持动态切换
+    from config import EMAIL_PROVIDER as current_provider
+    
+    if current_provider == "gptmail":
         return gptmail_service.get_verification_code(email, max_retries, interval)
 
-    # 默认使用 KYX 系统
+    # 默认使用 KYX / Cloud Mail 系统
     return get_verification_code(email, max_retries, interval)
 
 
@@ -698,9 +707,12 @@ def unified_fetch_emails(email: str) -> list:
     Returns:
         list: 邮件列表
     """
-    if EMAIL_PROVIDER == "gptmail":
+    # 每次调用时重新获取配置，支持动态切换
+    from config import EMAIL_PROVIDER as current_provider
+    
+    if current_provider == "gptmail":
         emails, error = gptmail_service.get_emails(email)
         return emails
 
-    # 默认使用 KYX 系统
+    # 默认使用 KYX / Cloud Mail 系统
     return fetch_email_content(email)