Toggle routes silently no-opped when _marker_filter_bridges lacked the filter
name, so update_marker's enabled-only short-circuit succeeded without toggling
uBridge — the controller-layer enabled was set but the uBridge filter stayed on
and kept emitting signals. Now the toggle routes raise HTTPException 404
(FastAPI handles it directly, no ERROR log); the controller's except catches it
and falls back to self.update() (NIO rebuild, which applies the marker + off).
34b644a548