LocalSitePlannerAvailable

Whether the Site Planner coverage-estimate flow is available (Google flavor only, backed by the official hosted planner). Gates the "Estimate coverage" action on the node detail screen; the map's own control is gated equivalently in the Google MapView. Defaults to false so F-Droid/release never surface a dead action.

Flavor-injected feature availability, mirroring the other Local*Provider seams in this package (all baselined for this rule); a plain boolean local is the lightest way to gate a commonMain UI action on a flavor capability.