fix(#1643): filter destroyed-agent targets from dashboard schedule view

hive-c0re/src/dashboard/schedules.rs

@@ -18,12 +18,24 @@ use super::{AppState, error_response};
 /// so the frontend can render without an extra translation layer.
 pub(super) async fn api_schedules(State(state): State<AppState>) -> Response {
     match state.coord.scheduled_prompts.list() {
-        Ok(rows) => axum::Json(
-            rows.into_iter()
+        Ok(rows) => {
+            let mut wire: Vec<hive_sh4re::WireSchedule> = rows
+                .into_iter()
                 .map(crate::manager_server::schedule_to_wire_public)
-                .collect::<Vec<_>>(),
-        )
-        .into_response(),
+                .collect();
+            // Drop ghost targets (agents that no longer exist) so the
+            // table never shows dead columns. Uses the reliable async
+            // roster snapshot here on the request path.
+            let live: std::collections::HashSet<String> = state
+                .coord
+                .containers_snapshot()
+                .await
+                .into_iter()
+                .map(|c| c.name)
+                .collect();
+            crate::manager_server::filter_ghost_schedule_targets(&mut wire, &live);
+            axum::Json(wire).into_response()
+        }
         Err(e) => error_response(&format!("scheduled_prompts list: {e:#}")),
     }
 }