feat: HA tab — filter scenes/media_player, nightly full resync cron, remove JS polling

- ha.php skipDomains: added media_player, scene
- ha.php skipKeywords: konnected, energy/power/voltage/current, full camera list
- stats_cache.php: same filter updates, removed scene/media_player from sync
- Removed JS setInterval polling; entity state kept fresh by HA agent push
- Added nightly 3am cron for full HA entity resync

public_html/assets/js/jarvis-app.js

@@ -698,16 +698,6 @@ async function loadProxmox() {
 }
 
 // ── HOME ASSISTANT ────────────────────────────────────────────────────
-let _haRefreshTimer = null;
-function _startHARefresh() {
-  if (_haRefreshTimer) return;
-  _haRefreshTimer = setInterval(() => {
-    if (document.getElementById('tab-ha')?.classList.contains('active') ||
-        document.getElementById('tab-home')?.classList.contains('active')) {
-      loadHA();
-    }
-  }, 30000);
-}
 async function loadHA() {
   const data = await api('ha');
   const el = document.getElementById('ha-list');
@@ -733,7 +723,6 @@ async function loadHA() {
   }
 
   renderHATable(entities);
-  _startHARefresh();
 }
 
 const _domainIcon = {