v0.3.3

Fixed

• Coordinator: timezone-naive state.last_changed values are now guarded with .replace(tzinfo=timezone.utc) in both the staleness check and cooldown_start assignment — prevents comparison errors on systems where HA returns tz-naive datetimes
• Sensor: group_summary online count no longer over-reports when entities have not yet been processed by the coordinator — count now iterates over monitored_entities instead of device_states.values()
• Init: _card_installed flag moved from a module-level global to hass.data[DOMAIN] — prevents cross-instance state bleed when multiple HA instances run in the same process
• Card: CARD_VERSION constant corrected to 0.3.3 (was mismatched with integration version)

Changed

• Storage: unknown availability window strings now log a warning before falling back to 24 h

Documentation

• README sensor table now lists all four availability window sensors (today, 3d, 5d, 7d)
• Added dashboard example screenshot section to README