An ISOLATED app — its own config, event bus, storage and single-map guard, NOT the shared
default. This is what lets two independent widgets (e.g. a Google map and a Leaflet map) coexist
on one page: each mount({ isolated: true }) gets a fresh app, so the per-app "already-mounted"
guard does not collide. (The ambient DOM/config pointers are still last-writer-wins — fine for
bare maps; the layer subsystems are not yet fully isolated.)
An ISOLATED app — its own config, event bus, storage and single-map guard, NOT the shared default. This is what lets two independent widgets (e.g. a Google map and a Leaflet map) coexist on one page: each
mount({ isolated: true })gets a fresh app, so the per-app "already-mounted" guard does not collide. (The ambient DOM/config pointers are still last-writer-wins — fine for bare maps; the layer subsystems are not yet fully isolated.)