feat(route-builder): SAC-red trail + refit map on image drop

Trail polyline now uses the same SAC white-red-white red as the /hikes
overview and detail pages so the live preview reads as the final
published track. Dropping geolocated images now reframes the edit map
to the new bounds via a shared `mapView.fitTick` signal — covers GPX
imports too if they ever wire it up.

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "homepage",
-	"version": "1.77.1",
+	"version": "1.77.2",
 	"private": true,
 	"type": "module",
 	"scripts": {