feat: enhance permission handling and user feedback for Gmail and Google Calendar tools

- Implemented logic to persist authentication expiration status for connectors when insufficient permissions are detected, improving error handling and user experience.
- Updated messages to guide users to re-authenticate in connector settings for Gmail, Google Calendar, and Google Drive tools.
- Added InsufficientPermissionsResult type and corresponding UI components to display permission-related messages consistently across Gmail and Google Calendar tools.

surfsense_backend/app/routes/google_calendar_add_connector_route.py

@@ -34,7 +34,7 @@ logger = logging.getLogger(__name__)
 
 router = APIRouter()
 
-SCOPES = ["https://www.googleapis.com/auth/calendar.readonly"]
+SCOPES = ["https://www.googleapis.com/auth/calendar.events"]
 REDIRECT_URI = config.GOOGLE_CALENDAR_REDIRECT_URI
 
 # Initialize security utilities

surfsense_backend/app/routes/google_gmail_add_connector_route.py

@@ -73,7 +73,7 @@ def get_google_flow():
                 }
             },
             scopes=[
-                "https://www.googleapis.com/auth/gmail.readonly",
+                "https://www.googleapis.com/auth/gmail.modify",
                 "https://www.googleapis.com/auth/userinfo.email",
                 "https://www.googleapis.com/auth/userinfo.profile",
                 "openid",