The firmware actually running on the deployed TRVs (SHTRV-01 v2.2.4,
confirmed against live hardware) publishes a combined status blob on
shellies/<id>/status, not the per-field shellies/<id>/thermostat/0/target_t
topic handleStatus() was written against — so current_target_temp was
permanently NULL and the dashboard modal always showed "—".
Adds handleStatusBlob() to parse the real payload shape and populate
current_target_temp/current_room_temp/battery_pct. This firmware also has
no guest-vs-automation 'source' field, so guest detection is redesigned to
diff an incoming target_t against a new last_commanded_target_t column,
stamped by publishTarget() right before every command is sent. A mismatch
means the guest changed it via the dial; a match means it's an echo of our
own automation.
Old handleStatus()/topicMatchesStatus() path left in place, dormant —
harmless if some future firmware does use per-field topics.
TRV command topic (shellies/<id>/thermostat/0/command/target_t) is still
unverified against live hardware — flagged in code comments.
jtricerolph
807a27ca1b