Final-review hardening:
- discover_printer falls back to direct IP reachability when printer_mac is
empty (restores legacy behavior; avoids permanent unreachable on misconfig).
Keeps the MAC check when a MAC IS set so we never print to a wrong DHCP tenant.
- bridge subprocess decodes child stdout as utf-8 explicitly, so a LANG=C systemd
locale can't UnicodeDecodeError on the success checkmark and mis-report error.
- add tests for both no-MAC fallback paths (5 passed).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Subscribes to posbriefing/button/press; on PRESS runs pos_briefing.py as a
subprocess (debounced via a lock) and reports status/availability. Registers an
HA button via MQTT discovery. Pins paho CallbackAPIVersion.VERSION1 (paho 2.1.0
is installed for claude and warns on the implicit default).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Mortdecai