- Fix build button being unclickable by properly handling disabled attribute
(only set when isBuilding is true, not undefined/false)
- Fix SSH host key mismatch errors in do_scp by cleaning stale known_hosts
entries from all possible locations (/root/.ssh, /.ssh, /overlay/upper/.ssh)
before transfers - prevents failures after device reflash
- Add cursor:pointer style to build button for better UX
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>