修复：告警通知显示真实区域名称，从 IoT 平台查询 area_id 对应的 areaName

- edge_compat 上报时传入 area_id 到通知流水线
- notify_dispatch 优先从 IoT 平台 API 查区域名（带缓存+token缓存）
- 演示模式下如果已有真实区域名则不覆盖为"演示区域"

app/routers/edge_compat.py

@@ -56,6 +56,7 @@ async def edge_alarm_report(
             "event_time": alarm.event_time,
             "alarm_level": alarm.alarm_level,
             "snapshot_url": alarm.snapshot_url,
+            "area_id": alarm.area_id,
         }
         asyncio.create_task(process_alarm_notification(notify_data))
     except Exception as e:

app/services/notify_dispatch.py

@@ -23,6 +23,7 @@ from app.models import (
 from app.config import settings
 from app.services.vlm_service import get_vlm_service
 from app.services.wechat_service import get_wechat_service, ALARM_TYPE_NAMES, ALARM_LEVEL_NAMES
+from app.services.camera_name_service import get_camera_name_service
 from app.services.work_order_client import get_work_order_client
 from app.utils.logger import logger
 from app.utils.timezone import beijing_now
@@ -42,6 +43,7 @@ async def process_alarm_notification(alarm_data: Dict):
     snapshot_url = alarm_data.get("snapshot_url", "")
     alarm_level = alarm_data.get("alarm_level", 2)
     event_time = alarm_data.get("event_time", "")
+    area_id = alarm_data.get("area_id")
 
     logger.info(f"开始处理告警通知: {alarm_id}")
 
@@ -51,8 +53,10 @@ async def process_alarm_notification(alarm_data: Dict):
         camera_name = alarm_data.get("camera_name", device_id)
         scene_id = alarm_data.get("scene_id", "")
 
-        # 查找区域名称用于 VLM prompt（比 UUID 更有意义）
-        area_name_for_vlm, _, _ = _get_notify_persons(device_id, alarm_level)
+        # 查找区域名称：优先从 IoT 平台查 area_id，降级到通知三表
+        area_name_for_vlm = await _get_area_name_from_iot(area_id) if area_id else ""
+        if not area_name_for_vlm:
+            area_name_for_vlm, _, _ = _get_notify_persons(device_id, alarm_level)
         roi_name = area_name_for_vlm if area_name_for_vlm != "未知区域" else scene_id
 
         # snapshot_url 可能是 COS object key，需转为可访问的预签名URL
@@ -89,7 +93,8 @@ async def process_alarm_notification(alarm_data: Dict):
             test_uids = [uid.strip() for uid in settings.wechat.test_uids.split(",") if uid.strip()]
             if test_uids:
                 persons = [{"person_name": "测试用户", "wechat_uid": uid, "role": "TEST"} for uid in test_uids]
-                area_name = "演示区域"
+                if not area_name or area_name == "未知区域":
+                    area_name = "演示区域"
                 logger.info(f"演示模式: 使用测试用户 {test_uids}")
 
         if not persons:
@@ -284,6 +289,59 @@ def _get_notify_persons(camera_id: str, alarm_level: int) -> tuple:
         db.close()
 
 
+# 区域名称缓存（area_id → area_name），避免重复查询
+_area_name_cache: Dict[int, str] = {}
+_iot_token_cache: Dict[str, str] = {"token": "", "expire": 0}
+
+
+async def _get_area_name_from_iot(area_id: int) -> str:
+    """从 IoT 平台查询区域名称（带缓存）"""
+    if not area_id:
+        return ""
+    if area_id in _area_name_cache:
+        return _area_name_cache[area_id]
+    try:
+        import httpx
+        import time
+        base_url = settings.work_order.base_url
+        if not base_url:
+            return ""
+
+        # Token 缓存（有效期内复用）
+        now = time.time()
+        if not _iot_token_cache["token"] or now > _iot_token_cache["expire"]:
+            async with httpx.AsyncClient(timeout=5) as client:
+                login_resp = await client.post(
+                    f"{base_url}/admin-api/system/auth/login",
+                    json={"username": "admin", "password": "admin123", "tenantName": "默认"},
+                    headers={"tenant-id": "1"},
+                )
+                login_data = login_resp.json().get("data", {})
+                _iot_token_cache["token"] = login_data.get("accessToken", "")
+                # token 有效期约 30 分钟，这里缓存 20 分钟
+                _iot_token_cache["expire"] = now + 1200
+
+        token = _iot_token_cache["token"]
+        if not token:
+            return ""
+
+        async with httpx.AsyncClient(timeout=5) as client:
+            resp = await client.get(
+                f"{base_url}/admin-api/ops/area/get",
+                params={"id": area_id},
+                headers={"tenant-id": "1", "Authorization": f"Bearer {token}"},
+            )
+            data = resp.json()
+            if data.get("code") == 0 and data.get("data"):
+                name = data["data"].get("areaName", "")
+                if name:
+                    _area_name_cache[area_id] = name
+                    return name
+    except Exception as e:
+        logger.warning(f"查询IoT平台区域名失败: area_id={area_id}, error={e}")
+    return ""
+
+
 def _get_alarm_area_id(alarm_id: str) -> int:
     """从 alarm_event 表获取 area_id"""
     db = get_session()