fix: auto-wake after turn if pending messages exist, don't block on recv

hive-ag3nt/src/bin/hive-ag3nt.rs

@@ -165,6 +165,15 @@ async fn serve(
                 let outcome = turn::drive_turn(&prompt, files, &bus).await;
                 turn::emit_turn_end(&bus, &outcome);
                 bus.set_state(TurnState::Idle);
+
+                // After turn completes, check if there are pending messages waiting.
+                // If so, immediately process them instead of blocking on recv().
+                // This ensures messages queued during the turn are processed ASAP.
+                let pending = inbox_unread(socket).await;
+                if pending > 0 {
+                    tracing::info!(%pending, "pending messages after turn; fetching next");
+                    continue; // Loop back to recv() immediately instead of sleeping
+                }
             }
             Ok(AgentResponse::Empty) => {
                 // Idle: brief sleep before next poll to avoid busy-looping