- The fan's power write hardcoded /power/vs/0 while is_on already read
/power/0 as a fallback -- a board reporting only the OCF resource
would show correct state but silently no-op on every turn-on/off.
Mirrors LocalThingsRangeHoodFan's existing _power_payload pattern:
target whichever power href the board actually reports.
- async_set_preset_mode fell off the loop silently on an unmatched
mode with no log and no error, unlike the rest of this codebase's
write-rejection handling. Logs a warning now.
- Deduplicated HEPA_FILTER's usage-percent calculation, which was an
inline reimplementation of airconditioner._filter_usage_percent;
promoted the shared logic to common.filter_usage_percent and pointed
both families at it.
- Gave air_purifier.SOUND_MODE its own translation_key instead of
defaulting to the same catalog entry laundry.SOUND_MODE uses. That
entry's state table is {voice, tone, mute}; this board's is
{mute, buzzer} -- sharing it left 'buzzer' with no label.
Marc Billow
f37c9ec4ef