优化：企微通知时间只显示 MM-DD HH:MM，去掉年份和秒

app/services/notify_dispatch.py

@@ -107,10 +107,13 @@ async def process_alarm_notification(alarm_data: Dict):
             logger.info(f"企微未启用，跳过通知: {alarm_id}")
             return
 
-        event_time_str = (
-            event_time.strftime("%Y-%m-%d %H:%M:%S")
-            if isinstance(event_time, datetime) else str(event_time or "")
-        )
+        # 通知显示时间：只显示 MM-DD HH:MM（不含年份和秒）
+        if isinstance(event_time, datetime):
+            event_time_str = event_time.strftime("%m-%d %H:%M")
+        else:
+            # 字符串格式 "2026-03-19 10:54:24" → "03-19 10:54"
+            s = str(event_time or "")
+            event_time_str = s[5:16] if len(s) >= 16 else s
 
         user_ids = [p["wechat_uid"] for p in persons]
         group_chat_id = settings.wechat.group_chat_id