- messages_sent now increments when a message is queued (async_send_message),
not only when a delivery proof returns. LXMessage's delivery callback only
fires on a returned proof (LXMessage.py ~566), which many peers/methods never
send, so the "Messages sent" sensor was stuck at 0 for messages that were
actually delivered. The delivery callback now only emits the event.
- Implement the previously-inert "greeting" option: send it automatically the
first time each sender contacts HA (tracked per sender in RuntimeData).
- Clarify the notify entity (rename to "Send message" / "Отправить сообщение")
and document greeting + notify in strings/translations/README.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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