fix(settings): persist Online Inbox tab on settings save

src/ClaudeDo.Ui/ViewModels/Modals/Settings/OnlineInboxSettingsViewModel.cs

@@ -52,8 +52,9 @@ public sealed partial class OnlineInboxSettingsViewModel : ViewModelBase
         finally { IsBusy = false; }
     }
 
-    [RelayCommand]
-    private async Task Save()
+    // Persists the Online Inbox config. Exceptions propagate so callers (the modal's Apply)
+    // can surface and halt; the per-tab Save button wraps this and shows its own message.
+    public async Task SaveAsync()
     {
         IsBusy = true;
         StatusMessage = "";
@@ -69,13 +70,16 @@ public sealed partial class OnlineInboxSettingsViewModel : ViewModelBase
                 RedirectUri));
             StatusMessage = Loc.T("vm.onlineInbox.saved");
         }
-        catch (Exception ex)
-        {
-            StatusMessage = Loc.T("vm.onlineInbox.saveFailed", ex.Message);
-        }
         finally { IsBusy = false; }
     }
 
+    [RelayCommand]
+    private async Task Save()
+    {
+        try { await SaveAsync(); }
+        catch (Exception ex) { StatusMessage = Loc.T("vm.onlineInbox.saveFailed", ex.Message); }
+    }
+
     [RelayCommand]
     private async Task SignIn()
     {

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

@@ -100,6 +100,7 @@ public sealed partial class SettingsModalViewModel : ViewModelBase
                 Prime.DailyPrepMaxTasks);
             await _worker.UpdateAppSettingsAsync(dto);
             await Prime.SaveAsync();
+            await OnlineInbox.SaveAsync();
             CloseAction?.Invoke();
         }
         catch (Exception ex) { StatusMessage = Loc.T("vm.settingsModal.saveFailed", ex.Message); }