fix: ensure aggregate presence change flushes queue

src/service/presence/pipeline.rs

@@ -98,6 +98,7 @@ impl Service {
 		refresh_window_ms: Option<u64>,
 	) -> Result {
 		let now = tuwunel_core::utils::millis_since_unix_epoch();
+		// 1) Capture per-device presence snapshot for aggregation.
 		debug!(
 			?user_id,
 			?device_key,
@@ -118,6 +119,7 @@ impl Service {
 			)
 			.await;
 
+		// 2) Compute the aggregated presence across all devices.
 		let aggregated = self
 			.device_presence
 			.aggregate(user_id, now, self.idle_timeout, self.offline_timeout)
@@ -131,17 +133,23 @@ impl Service {
 			"Presence aggregate computed"
 		);
 
+		// 3) Load the last persisted presence to decide whether to skip or merge.
 		let last_presence = self.db.get_presence(user_id).await;
 		let (last_count, last_event) = match last_presence {
 			| Ok((count, event)) => (Some(count), Some(event)),
 			| Err(_) => (None, None),
 		};
 
+		let last_state = last_event
+			.as_ref()
+			.map(|event| event.content.presence.clone());
+
 		let state_changed = match &last_event {
 			| Some(event) => event.content.presence != aggregated.state,
 			| None => true,
 		};
 
+		// 4) For rapid pings with no state change, skip writes and reschedule.
 		if !state_changed
 			&& let Some((count, last_last_active_ago)) =
 				Self::refresh_skip_decision(refresh_window_ms, last_event.as_ref(), last_count)
@@ -163,6 +171,25 @@ impl Service {
 			return Ok(());
 		}
 
+		// 5) If we just transitioned away from online, flush suppressed pushes.
+		if matches!(last_state, Some(PresenceState::Online))
+			&& aggregated.state != PresenceState::Online
+		{
+			debug!(
+				?user_id,
+				from = ?PresenceState::Online,
+				to = ?aggregated.state,
+				"Presence went inactive; flushing suppressed pushes"
+			);
+			self.services
+				.sending
+				.schedule_flush_suppressed_for_user(
+					user_id.to_owned(),
+					"presence->inactive (aggregate)",
+				);
+		}
+
+		// 6) Persist the aggregated presence, preserving last non-empty status.
 		let fallback_status = last_event
 			.and_then(|event| event.content.status_msg)
 			.filter(|msg| !msg.is_empty());

src/service/sending/sender.rs

@@ -938,6 +938,7 @@ impl Service {
 			return;
 		}
 
+		let mut sent = 0_usize;
 		debug!(?user_id, pushkey, rooms = rooms.len(), "Flushing suppressed pushes ({reason})");
 
 		for (room_id, pdu_ids) in rooms {
@@ -984,9 +985,13 @@ impl Service {
 						requeued,
 						"Failed to send suppressed push notification"
 					);
+				} else {
+					sent = sent.saturating_add(1);
 				}
 			}
 		}
+
+		debug!(?user_id, pushkey, sent, "Flushed suppressed push notifications");
 	}
 
 	async fn flush_suppressed_for_pushkey(