fix(ui): sync role select to live role; mark RF chip unavailable on poll failure

payload/user/remote_access/pager-webui/www/js/app.js

@@ -527,11 +527,21 @@ const Live = (() => {
     }
   }
   function pollRfplan() {
-    fetch(App.apiBase + '/api/rfplan', { credentials: 'include' }).then((r) => r.json())
-      .then((d) => {
-        rfState = d && typeof d.role === 'string' ? d : null;
-        renderRfChip();
-      }).catch(() => {});
+    fetch(App.apiBase + '/api/rfplan', { credentials: 'include' }).then((r) => {
+      if (!r.ok) throw new Error('http ' + r.status);
+      return r.json();
+    }).then((d) => {
+      rfState = d && typeof d.role === 'string' ? d : null;
+      renderRfChip();
+    }).catch(() => {
+      rfState = null;
+      const el = document.getElementById('rf-chip');
+      if (el) {
+        el.textContent = 'PHY1: ?';
+        el.title = 'RF plan unavailable';
+        el.className = 'health-chip warn';
+      }
+    });
   }
   function renderRfChip() {
     const el = document.getElementById('rf-chip');