TDS polish: lt-frame tables, lt-stats-grid link summary, settings-aware refresh

- links.html: replace custom link-summary-panel with lt-stats-grid/lt-stat-card
  showing total interfaces, ports down, errors, and PoE load
- suppressions.html: wrap active suppressions and history tables in lt-frame
  with lt-section-header labels
- inspector.html: wire auto-refresh to gandalfSettings (respects interval pill),
  fix updated timestamp to use locale time

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

templates/inspector.html

@@ -427,9 +427,10 @@ function renderInspector(data) {
   const main = document.getElementById('inspector-main');
   const switches = data.unifi_switches || {};
 
-  const upd = data.updated ? `Updated: ${data.updated}` : '';
   const updEl = document.getElementById('inspector-updated');
-  if (updEl) updEl.textContent = upd;
+  if (updEl && data.updated) {
+    updEl.textContent = 'Updated: ' + new Date(data.updated + (data.updated.includes('Z') ? '' : 'Z')).toLocaleTimeString();
+  }
 
   if (!Object.keys(switches).length) {
     main.innerHTML = '<p class="empty-state">No switch data available. Monitor may still be initialising.</p>';
@@ -465,7 +466,13 @@ async function loadInspector() {
 }
 
 loadInspector();
-lt.autoRefresh.start(loadInspector, 60000);
+var _inspInterval = (window.gandalfSettings && window.gandalfSettings.refreshInterval) || 60;
+if (_inspInterval > 0) lt.autoRefresh.start(loadInspector, Math.max(_inspInterval, 15) * 1000);
+
+window.onGandalfSettingsChanged = function(s) {
+  lt.autoRefresh.stop();
+  if (s.refreshInterval > 0) lt.autoRefresh.start(loadInspector, Math.max(s.refreshInterval, 15) * 1000);
+};
 lt.keys.on('Escape', () => {
   if (document.getElementById('inspector-panel').classList.contains('open')) closePanel();
 });