feat(ui): Throttle-Stufen im Ausfuehrung-Tab sichtbar machen

Die vier UsageThrottle-Prozente waren nur per Gauge-Drag im Usage-Monitor
erreichbar und wurden im Settings-Modal unsichtbar durchgeschleift. Jetzt
read-only angezeigt plus Button in den Usage-Monitor. Der Button schliesst die
Settings absichtlich: Save() schreibt die beim Oeffnen gelesenen Throttle-Werte
zurueck und wuerde ein zwischenzeitliches Draggen ueberschreiben.

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

@@ -66,6 +66,18 @@ public sealed partial class SettingsModalViewModel : ViewModelBase
     [RelayCommand]
     private void OpenRepoImport() => RequestRepoImport?.Invoke();
 
+    // Same deal for the usage monitor, which owns the throttle-stage editor. It must *close* this
+    // modal rather than stack on top: Save() writes the throttle values it read at open, so a drag
+    // made while Settings is still open would be overwritten on save.
+    public Action? RequestUsageMonitor { get; set; }
+
+    [RelayCommand]
+    private void OpenUsageMonitor() => RequestUsageMonitor?.Invoke();
+
+    /// Read-only echo of the four throttle percentages, which are edited by dragging the
+    /// usage-monitor gauges — without this the Execution tab silently carries them through.
+    [ObservableProperty] private string _throttleSummary = "";
+
     [ObservableProperty] private string _validationError = "";
     [ObservableProperty] private bool _isBusy;
     [ObservableProperty] private string _statusMessage = "";
@@ -135,6 +147,9 @@ public sealed partial class SettingsModalViewModel : ViewModelBase
                 _throttleStages = (
                     dto.UsageThrottleFiveHourSoftPct, dto.UsageThrottleFiveHourHardPct,
                     dto.UsageThrottleSevenDaySoftPct, dto.UsageThrottleSevenDayHardPct);
+                ThrottleSummary = Loc.T("settings.general.throttleStagesValues",
+                    _throttleStages.FiveSoft, _throttleStages.FiveHard,
+                    _throttleStages.SevenSoft, _throttleStages.SevenHard);
                 Worktrees.WorktreeStrategy = dto.WorktreeStrategy ?? "sibling";
                 Worktrees.CentralWorktreeRoot = dto.CentralWorktreeRoot;
                 Worktrees.WorktreeAutoCleanupEnabled = dto.WorktreeAutoCleanupEnabled;
@@ -148,6 +163,7 @@ public sealed partial class SettingsModalViewModel : ViewModelBase
             }
             else StatusMessage = Loc.T("vm.settingsModal.workerOffline");
 
+            await Files.LoadClaudeBinAsync();
             await Prime.LoadAsync();
             await OnlineInbox.LoadAsync();
             await SessionSkills.LoadAsync(dto?.SessionSkills);