Fix training agent heartbeat status

crypto_spot_bot/training_coordination.py

@@ -206,9 +206,18 @@ class TrainingCoordinator:
         last_seen = _parse_time(str(worker.get("last_seen_at") or ""))
         active = self._active_job(state)
         latest = _latest_job(state)
+        recently_seen = bool(last_seen and datetime.now(UTC) - last_seen <= ONLINE_WINDOW)
+        agent_busy = bool(
+            active
+            and active.get("status") == "running"
+            and worker
+            and active.get("claimed_by") == worker.get("id")
+        )
         return {
             "available": True,
-            "agent_online": bool(last_seen and datetime.now(UTC) - last_seen <= ONLINE_WINDOW),
+            "agent_online": recently_seen or agent_busy,
+            "agent_recently_seen": recently_seen,
+            "agent_busy": agent_busy,
             "worker": worker,
             "active_job": active,
             "latest_job": latest,