Method _fetch_mails_once

src/services/temp_mail.py:347–422

获取一次邮件列表，按新旧接口顺序回退: 1) /api/mails (Bearer jwt) 2) /user_api/mails (x-user-token) 3) /admin/mails (按地址过滤) 4) /admin/mails (不过滤，客户端二次筛选)

(self, email: str, jwt: Optional[str], email_id: Optional[str] = None)

        return target in text_blob

    def _fetch_mails_once(self, email: str, jwt: Optional[str], email_id: Optional[str] = None) -> List[Dict[str, Any]]:
        """
        获取一次邮件列表，按新旧接口顺序回退:
        1) /api/mails (Bearer jwt)
        2) /user_api/mails (x-user-token)
        3) /admin/mails (按地址过滤)
        4) /admin/mails (不过滤，客户端二次筛选)
        """
        attempts: List[Dict[str, Any]] = []
        admin_limit = self._normalize_admin_limit(self.config.get("admin_mails_limit", 50), default=50)
        if jwt:
            attempts.extend([
                {
                    "path": "/api/mails",
                    "params": {"limit": 50, "offset": 0},
                    "headers": {
                        "Authorization": f"Bearer {jwt}",
                        "Accept": "application/json",
                    },
                },
                {
                    "path": "/user_api/mails",
                    "params": {"limit": 50, "offset": 0},
                    "headers": {
                        "x-user-token": jwt,
                        "Accept": "application/json",
                    },
                },
            ])

        attempts.append({
            "path": "/admin/mails",
            "params": {"limit": admin_limit, "offset": 0, "address": email},
            "headers": {"Accept": "application/json"},
        })
        if email_id and email_id != email:
            attempts.append({
                "path": "/admin/mails",
                "params": {"limit": admin_limit, "offset": 0, "address": email_id},
                "headers": {"Accept": "application/json"},
            })
        attempts.append({
            "path": "/admin/mails",
            "params": {"limit": admin_limit, "offset": 0},
            "headers": {"Accept": "application/json"},
        })

        for attempt in attempts:
            path = attempt["path"]
            try:
                if path == "/admin/mails":
                    raw_params = dict(attempt["params"] or {})
                    preferred_limit = raw_params.pop("limit", admin_limit)
                    offset = raw_params.pop("offset", 0)
                    response = self._request_admin_mails_with_limit_fallback(
                        offset=offset,
                        extra_params=raw_params,
                        preferred_limit=preferred_limit,