feat(usage): split throttle thresholds per bucket, add draggable gauge markers

src/ClaudeDo.Ui/Views/Modals/UsageMonitorModalView.axaml.cs

@@ -1,8 +1,36 @@
 using Avalonia.Controls;
+using Avalonia.Input;
+using Avalonia.Interactivity;
+using ClaudeDo.Ui.ViewModels.Modals;
 
 namespace ClaudeDo.Ui.Views.Modals;
 
 public partial class UsageMonitorModalView : Window
 {
     public UsageMonitorModalView() => InitializeComponent();
+
+    /// <summary>
+    /// Persists a stage typed into a gauge's legend box. `NumericUpDown` has no commit command, so
+    /// the box's <c>Tag</c> names the stage and the row's matching command does the clamp + save.
+    /// </summary>
+    private void OnStageBoxCommit(object? sender, RoutedEventArgs e)
+    {
+        if (sender is not Control { Tag: string stage, DataContext: UsageGaugeRowViewModel row }) return;
+
+        var command = stage switch
+        {
+            "soft" => row.CommitSoftCommand,
+            "hard" => row.CommitHardCommand,
+            _ => row.CommitGateCommand,
+        };
+
+        if (command.CanExecute(null)) command.Execute(null);
+    }
+
+    private void OnStageBoxKeyDown(object? sender, KeyEventArgs e)
+    {
+        if (e.Key != Key.Enter) return;
+        OnStageBoxCommit(sender, e);
+        e.Handled = true;
+    }
 }