fix: return a dictionary from get_config method in ConfigService

Author: vastsa

apps/admin/services.py

@@ -70,7 +70,7 @@ async def share_local_file(self, item):
 
 class ConfigService:
     def get_config(self):
-        return settings.items()
+        return dict(settings.items())
 
     async def update_config(self, data: dict):
         admin_token = data.get("admin_token")