The two-channel rollout added releases/BETA + latest-beta, but the firmware
vhost only had exact-match handling for the old stable paths. Add:
- location = /releases/BETA -> serves releases/BETA/index.json at the no-slash
path the device requests when 'Get test builds (beta)' is on (mirrors TOUCH).
- location /latest-beta/ -> the beta web-flasher feed (was hitting the 404
catch-all).
Stable paths and all bins under /releases/ were already correct; this only wires
up the new beta directory-index + feed.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
