refactor: move import to module level and extract event handler

- Move ProgressType import to top-level in auth.py
- Extract suggestion link click handler into attachSuggestionLinkEvents() function
- Reuse handler after search results load

src/server/api/auth.py

@@ -16,6 +16,7 @@ from src.server.models.auth import (
 from src.server.models.config import AppConfig
 from src.server.services.auth_service import AuthError, LockedOutError, auth_service
 from src.server.services.config_service import get_config_service
+from src.server.services.progress_service import ProgressType
 
 logger = structlog.get_logger(__name__)
 
@@ -194,7 +195,6 @@ async def setup_auth(req: SetupRequest):
                 )
             except Exception as e:
                 # Send error event
-                from src.server.services.progress_service import ProgressType
                 await progress_service.start_progress(
                     progress_id="initialization_error",
                     progress_type=ProgressType.ERROR,