Migrate inspector and links pages to TDS lt.* APIs

- Add escHtml alias (lt.escHtml) to both pages so existing template strings work without touching 40+ call sites
- Replace raw fetch() with lt.api.get/post in loadInspector, loadLinks, runDiagnostic, pollDiagnostic
- Replace setInterval(load*, 60000) with lt.autoRefresh.start() for intelligent polling
- Add lt.toast.error() to catch blocks for user-visible error feedback

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

templates/links.html

@@ -20,6 +20,8 @@
 
 {% block scripts %}
 <script>
+const escHtml = s => lt.escHtml(s);
+
 // ── Formatting helpers ────────────────────────────────────────────
 function fmtRate(bytesPerSec) {
   if (bytesPerSec === null || bytesPerSec === undefined) return '–';
@@ -480,13 +482,7 @@ function checkLinksStale(updatedStr) {
 // ── Fetch + render ────────────────────────────────────────────────
 async function loadLinks() {
   try {
-    const resp = await fetch('/api/links');
-    if (!resp.ok) {
-      document.getElementById('links-container').innerHTML =
-        '<div class="error-state">Failed to load link statistics.</div>';
-      return;
-    }
-    const data = await resp.json();
+    const data = await lt.api.get('/api/links');
     if (!data.hosts && !data.unifi_switches) {
       document.getElementById('links-container').innerHTML =
         '<div class="link-no-data">No link data yet — monitor has not completed a full cycle.</div>';
@@ -501,10 +497,11 @@ async function loadLinks() {
   } catch (e) {
     document.getElementById('links-container').innerHTML =
       '<div class="error-state">Network error loading link statistics.</div>';
+    lt.toast.error('Failed to load link statistics');
   }
 }
 
 loadLinks();
-setInterval(loadLinks, 60000);
+lt.autoRefresh.start(loadLinks, 60000);
 </script>
 {% endblock %}