:title
request_query_route

:sig
DValue request_query_route(Request& context, String default_path = "index")

:see
request_query_path
request_context_params
route_path_sanitize
request_script_url

:content
Builds a small route tree from the first keyless query-string segment.

Fields:

- `raw_path`: normalized but untrusted route input, for diagnostics only
- `l_path`: sanitized full route path, or empty string when input was rejected
- `page`: first path segment of `l_path`, or empty string when input was rejected
- `valid`: boolean; true when `l_path` is safe

```cpp
DValue route = request_query_route(context);
if(route["valid"].to_bool())
    print("route=", route["l_path"].to_string());
```

This supports front-controller apps that use URLs such as `/?dashboard` or `/?workspace/projects` while still allowing ordinary named query parameters alongside the route. The returned `l_path` is already sanitized for composing under an application-controlled route root.