style: apply ruff auto-fix

- Auto-formatted code with ruff format
- Applied ruff linting fixes with --fix

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

app/main.py

@@ -418,9 +418,7 @@ async def http_exception_handler(request: Request, exc: HTTPException):
     # For frontend routes, return appropriate HTML templates
     # Handle 404 errors with a custom template
     if exc.status_code == 404:
-        return _error_templates.TemplateResponse(
-            request, "404.html", status_code=status.HTTP_404_NOT_FOUND
-        )
+        return _error_templates.TemplateResponse(request, "404.html", status_code=status.HTTP_404_NOT_FOUND)
 
     # For other HTTP errors, we could create specific templates or use a generic one
     # For now, return a simple error page