feat: Teams MessageCard

refer to https://learn.microsoft.com/en-us/microsoftteams/platform/webhooks-and-connectors/how-to/connectors-using\?tabs\=cURL\#example-of-connector-message

backend/utils/webhook.py

+import json
+
 import requests
+from config import VERSION
 
 
 def post_webhook(url: str, message: str, event_data: dict) -> bool:
@@ -9,6 +12,27 @@ def post_webhook(url: str, message: str, event_data: dict) -> bool:
             payload["text"] = message
         elif "https://discord.com/api/webhooks" in url:
             payload["content"] = message
+        elif "webhook.office.com" in url:
+            action = event_data.get("action", "undefined")
+            facts = [
+                {"name": name, "value": value}
+                for name, value in json.loads(event_data.get("user", {})).items()
+            ]
+            payload = {
+                "@type": "MessageCard",
+                "@context": "http://schema.org/extensions",
+                "themeColor": "0076D7",
+                "summary": message,
+                "sections": [
+                    {
+                        "activityTitle": message,
+                        "activitySubtitle": f"Open WebUI ({VERSION}) - {action}",
+                        "activityImage": "https://openwebui.com/favicon.png",
+                        "facts": facts,
+                        "markdown": True,
+                    }
+                ],
+            }
         else:
             payload = {**event_data}