fix(ui): don't leave an orphaned list behind on cancel

"New list" pre-creates the DB row before opening List Settings.
Cancelling or closing that modal left an untitled empty list behind;
CreateListAsync now rolls the row back unless the modal reports Saved.

Also moves the new-list/import-repo buttons up next to the "My Lists"
label instead of a row below the list, and puts Notes above Important
in the smart-list nav order.

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

@@ -26,6 +26,10 @@ public sealed partial class ListSettingsModalViewModel : ViewModelBase
     // True after the list was deleted, so the caller reloads the list nav instead of refreshing the row.
     public bool Deleted { get; private set; }
 
+    // False when the modal closed via Cancel or the window chrome — CreateListAsync uses this to
+    // roll the pre-created row back instead of leaving an untitled empty list behind.
+    public bool Saved { get; private set; }
+
     // Wired by the view to prompt yes/no before deleting and to surface a blocking-FK error.
     public Func<string, Task<bool>>? ConfirmAsync { get; set; }
     public Func<string, Task>? ShowErrorAsync { get; set; }
@@ -149,6 +153,7 @@ public sealed partial class ListSettingsModalViewModel : ViewModelBase
             string.IsNullOrWhiteSpace(VerifyCommand) ? null : VerifyCommand,
             ticketProjectId);
 
+        Saved = true;
         CloseAction?.Invoke();
     }