feat(#1591): surface pending-login + crashing-agent banner warnings

hive-c0re/src/dashboard.rs

@@ -463,6 +463,13 @@ where
     }
 }
 
+/// Window over which container crashes count toward the `agents_crashing`
+/// banner warning. Wide enough that a crash-looping container (restarted
+/// by `Restart=on-failure` every few seconds) keeps the warning lit
+/// between flaps, short enough that a single recovered crash clears within
+/// minutes.
+const CRASH_WARNING_WINDOW: std::time::Duration = std::time::Duration::from_mins(10);
+
 async fn api_state(headers: HeaderMap, State(state): State<AppState>) -> axum::Json<StateSnapshot> {
     let host = headers
         .get("host")
@@ -523,6 +530,18 @@ async fn api_state(headers: HeaderMap, State(state): State<AppState>) -> axum::J
     .map(QuestionView::from_question)
     .collect();
 
+    // Banner warnings: host probes (disk) + agent-state (pending logins,
+    // crashing agents). Built before the response struct because the
+    // agent-state producer borrows `containers`, which moves in below.
+    let server_warnings = {
+        let mut w = crate::host_stats::server_warnings();
+        w.extend(crate::host_stats::agent_state_warnings(
+            &containers,
+            &state.coord.recent_crash_counts(CRASH_WARNING_WINDOW),
+        ));
+        w
+    };
+
     axum::Json(StateSnapshot {
         seq,
         hostname,
@@ -564,7 +583,7 @@ async fn api_state(headers: HeaderMap, State(state): State<AppState>) -> axum::J
             .ok()
             .filter(|s| !s.is_empty()),
         peer_hives: parse_peer_hives(),
-        server_warnings: crate::host_stats::server_warnings(),
+        server_warnings,
     })
 }