feat(ui): show newest log entries first in Log Visualizer

Reverses row order in LogVisualizerViewModel.Apply() so the most recent
entry sits at index 0, matching the "what just happened" use case;
filtering and refresh are unaffected since the reversal happens after
the warn/error filter is applied.

src/ClaudeDo.Ui/ViewModels/Modals/LogVisualizerViewModel.cs

@@ -45,7 +45,7 @@ public sealed partial class LogVisualizerViewModel : ViewModelBase
         IEnumerable<WorkerLogEntry> items = WarnErrorOnly
             ? _all.Where(e => e.Level is WorkerLogLevel.Warn or WorkerLogLevel.Error)
             : _all;
-        foreach (var e in items)
+        foreach (var e in items.Reverse())
             Rows.Add(new LogVisualizerRow(e.TimestampUtc.ToLocalTime().ToString("HH:mm:ss"), e.Message, e.Level));
         StatusText = Rows.Count == 0
             ? Loc.T("modals.logVisualizer.empty")