Update track_client_activity to handle missing rustdesk_id

- When rustdesk_id is not provided, update the most recent client for the API token
- This ensures user agents are updated even for clients not sending rustdesk_id
- Improves client reconnection handling

app/api/routes.py

@@ -810,37 +810,58 @@ def track_client_activity(api_token, rustdesk_id=None):
     try:
         if not api_token or not api_token.is_valid():
             return
-        
+
         from app.models import ClientActivity
         from flask import request
-        
+
         # Get client info
         ip_address = request.headers.get('X-Forwarded-For', request.remote_addr)
         user_agent = request.headers.get('User-Agent')
-        
-        # Check if client already exists
-        client = ClientActivity.query.filter_by(
-            api_token_id=api_token.id,
-            rustdesk_id=rustdesk_id or 'unknown'
-        ).first()
-        
-        if client:
-            # Update existing client
-            client.last_seen = datetime.utcnow()
-            client.ip_address = ip_address
-            client.user_agent = user_agent
-        else:
-            # Create new client
-            client = ClientActivity(
+
+        if rustdesk_id:
+            # If rustdesk_id is provided, use specific client
+            client = ClientActivity.query.filter_by(
                 api_token_id=api_token.id,
-                rustdesk_id=rustdesk_id or 'unknown',
-                ip_address=ip_address,
-                user_agent=user_agent
-            )
-            db.session.add(client)
-        
+                rustdesk_id=rustdesk_id
+            ).first()
+
+            if client:
+                # Update existing client
+                client.last_seen = datetime.utcnow()
+                client.ip_address = ip_address
+                client.user_agent = user_agent
+            else:
+                # Create new client
+                client = ClientActivity(
+                    api_token_id=api_token.id,
+                    rustdesk_id=rustdesk_id,
+                    ip_address=ip_address,
+                    user_agent=user_agent
+                )
+                db.session.add(client)
+        else:
+            # If no rustdesk_id provided, update the most recent client for this API token
+            client = ClientActivity.query.filter_by(
+                api_token_id=api_token.id
+            ).order_by(ClientActivity.last_seen.desc()).first()
+
+            if client:
+                # Update most recent client
+                client.last_seen = datetime.utcnow()
+                client.ip_address = ip_address
+                client.user_agent = user_agent
+            else:
+                # Create new client with unknown rustdesk_id
+                client = ClientActivity(
+                    api_token_id=api_token.id,
+                    rustdesk_id='unknown',
+                    ip_address=ip_address,
+                    user_agent=user_agent
+                )
+                db.session.add(client)
+
         db.session.commit()
-        
+
     except Exception as e:
         logger.error(f"Failed to track client activity: {str(e)}")