perf(ui): stop polling snapshots from audio stats

apps/chanora_flutter/lib/main.dart

@@ -311,7 +311,6 @@ class _BetaHomeState extends State<_BetaHome> with WidgetsBindingObserver {
   final List<String> _uiDiagnostics = [];
   rust.BridgeAudioStats? _audioStats;
   Timer? _statsTimer;
-  int _statsTick = 0;
   bool _snapshotRefreshInFlight = false;
   bool _snapshotRefreshQueued = false;
   bool _snapshotRefreshQueuedRecordActivity = false;
@@ -815,18 +814,10 @@ class _BetaHomeState extends State<_BetaHome> with WidgetsBindingObserver {
         final s = await rust.audioStats();
         if (!mounted) return;
         setState(() => _audioStats = s);
-        _statsTick += 1;
-        if (_statsTick % 4 == 0) {
-          unawaited(_refreshSnapshotForVoiceStatus());
-        }
       } catch (_) {}
     });
   }
 
-  Future<void> _refreshSnapshotForVoiceStatus() async {
-    await _refreshSnapshot(recordActivity: true, reportErrors: false);
-  }
-
   @override
   void didChangeAppLifecycleState(AppLifecycleState state) {
     final stateName = state.name;
@@ -1390,7 +1381,6 @@ class _BetaHomeState extends State<_BetaHome> with WidgetsBindingObserver {
   Future<void> _finishDisconnect() async {
     _statsTimer?.cancel();
     _statsTimer = null;
-    _statsTick = 0;
     _snapshotRefreshInFlight = false;
     _snapshotRefreshQueued = false;
     _snapshotRefreshQueuedRecordActivity = false;