The web interface runs headless, so every privileged systemctl call must be
covered by a NOPASSWD rule in /etc/sudoers.d/ledmatrix_web. The sudo command
matches the command line exactly, but the code called 'systemctl start
ledmatrix' while configure_web_sudo.sh grants 'systemctl start
ledmatrix.service'. The rule never matched, so start/stop/enable/disable/
restart fell back to a password prompt and failed with 'a terminal is
required to read the password'.
Align all privileged systemctl calls on the fully-qualified unit names the
sudoers grants use. Add a regression test that cross-checks api_v3.py calls
against the grants in configure_web_sudo.sh.
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
When a live-priority plugin (e.g. live sports, flights overhead) preempted
the rotation, the controller overwrote current_mode_index with the live
plugin's index. Once live priority ended, rotation continued from after the
live plugin's mode, skipping every mode between the interrupted position and
the live plugin. With a live plugin late in the order, modes just before it
were starved indefinitely.
Save the rotation position on the initial live-priority switch and restore it
when live priority ends, in a new _apply_live_priority() helper. Add
regression tests covering resume, no-double-save during the hold, and the
idle no-op.
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
