Port the approved ptica-v2 prototype to a new non-destructive route
/site-finder/analysis/{cad}/v2 — dark/light cockpit shell, real Leaflet
map (reuses PticaMapInner), 6 scan cards, lower/bottom grids, 11 drawers
and grounded chat. All values flow through the existing ptica-adapt layer
(real /analyze data or honest «—»). One beta link added on the analysis page.
