feat(services): 新增标准 IMAP 邮箱服务支持（Gmail/QQ/163等）

- 新增 EmailServiceType.IMAP_MAIL 枚举值和默认配置
- 新建 ImapMailService（imaplib 标准库，强制直连）
- 注册路由新增 imap_mail 分支和 available-services 键
- 邮箱服务路由新增 imap_mail stats 统计和类型描述
- accounts 路由 _build_inbox_config 支持 imap_mail
- 前端表单/列表/编辑完整支持 IMAP 子类型
- 无新增依赖

src/web/routes/accounts.py

@@ -1002,6 +1002,7 @@ def _build_inbox_config(db, service_type, email: str) -> dict:
         EST.TEMP_MAIL: "temp_mail",
         EST.DUCK_MAIL: "duck_mail",
         EST.FREEMAIL: "freemail",
+        EST.IMAP_MAIL: "imap_mail",
         EST.OUTLOOK: "outlook",
     }
     db_type = type_map.get(service_type)

src/web/routes/email.py

@@ -146,6 +146,7 @@ async def get_email_services_stats():
             'temp_mail_count': 0,
             'duck_mail_count': 0,
             'freemail_count': 0,
+            'imap_mail_count': 0,
             'tempmail_available': True,  # 临时邮箱始终可用
             'enabled_count': enabled_count
         }
@@ -161,6 +162,8 @@ async def get_email_services_stats():
                 stats['duck_mail_count'] = count
             elif service_type == 'freemail':
                 stats['freemail_count'] = count
+            elif service_type == 'imap_mail':
+                stats['imap_mail_count'] = count
 
         return stats
 
@@ -231,6 +234,18 @@ async def get_service_types():
                     {"name": "admin_token", "label": "Admin Token", "required": True, "secret": True},
                     {"name": "domain", "label": "邮箱域名", "required": False, "placeholder": "example.com"},
                 ]
+            },
+            {
+                "value": "imap_mail",
+                "label": "IMAP 邮箱",
+                "description": "标准 IMAP 协议邮箱（Gmail/QQ/163等），仅用于接收验证码，强制直连",
+                "config_fields": [
+                    {"name": "host", "label": "IMAP 服务器", "required": True, "placeholder": "imap.gmail.com"},
+                    {"name": "port", "label": "端口", "required": False, "default": 993},
+                    {"name": "use_ssl", "label": "使用 SSL", "required": False, "default": True},
+                    {"name": "email", "label": "邮箱地址", "required": True},
+                    {"name": "password", "label": "密码/授权码", "required": True, "secret": True},
+                ]
             }
         ]
     }

src/web/routes/registration.py

@@ -372,6 +372,20 @@ def _run_sync_registration_task(task_uuid: str, email_service_type: str, proxy:
                         logger.info(f"使用数据库 Freemail 服务: {db_service.name}")
                     else:
                         raise ValueError("没有可用的 Freemail 邮箱服务，请先在邮箱服务页面添加服务")
+                elif service_type == EmailServiceType.IMAP_MAIL:
+                    from ...database.models import EmailService as EmailServiceModel
+
+                    db_service = db.query(EmailServiceModel).filter(
+                        EmailServiceModel.service_type == "imap_mail",
+                        EmailServiceModel.enabled == True
+                    ).order_by(EmailServiceModel.priority.asc()).first()
+
+                    if db_service and db_service.config:
+                        config = _normalize_email_service_config(service_type, db_service.config, actual_proxy_url)
+                        crud.update_registration_task(db, task_uuid, email_service_id=db_service.id)
+                        logger.info(f"使用数据库 IMAP 邮箱服务: {db_service.name}")
+                    else:
+                        raise ValueError("没有可用的 IMAP 邮箱服务，请先在邮箱服务中添加")
                 else:
                     config = email_service_config or {}
 
@@ -1110,6 +1124,11 @@ async def get_available_email_services():
             "available": False,
             "count": 0,
             "services": []
+        },
+        "imap_mail": {
+            "available": False,
+            "count": 0,
+            "services": []
         }
     }
 
@@ -1219,6 +1238,25 @@ async def get_available_email_services():
         result["freemail"]["count"] = len(freemail_services)
         result["freemail"]["available"] = len(freemail_services) > 0
 
+        imap_mail_services = db.query(EmailServiceModel).filter(
+            EmailServiceModel.service_type == "imap_mail",
+            EmailServiceModel.enabled == True
+        ).order_by(EmailServiceModel.priority.asc()).all()
+
+        for service in imap_mail_services:
+            config = service.config or {}
+            result["imap_mail"]["services"].append({
+                "id": service.id,
+                "name": service.name,
+                "type": "imap_mail",
+                "email": config.get("email"),
+                "host": config.get("host"),
+                "priority": service.priority
+            })
+
+        result["imap_mail"]["count"] = len(imap_mail_services)
+        result["imap_mail"]["available"] = len(imap_mail_services) > 0
+
     return result