Dashboard Director

Assign any dashboard to Screen A / B / C. Pis pick it up within ~15 seconds.

Pi kiosk URLs:
Screen A → /kiosk.html?screen=a
Screen B → /kiosk.html?screen=b
Screen C → /kiosk.html?screen=c

Needs the local director server (so Save can write config). Phone on the same Wi‑Fi.