fix(ui): Import-Erfolgsmeldung nicht mehr als Fehler einfaerben

Der Footer-Strip trug schon immer ein Level, es gab nur keinen
Einstiegspunkt jenseits von FlashFooterError. "3 neue Tasks" in Rot
liest sich als Fehlschlag.

src/ClaudeDo.Ui/ViewModels/Islands/ListsIslandViewModel.cs

@@ -33,6 +33,9 @@ public sealed partial class ListsIslandViewModel : ViewModelBase, IDisposable
     // mirrors TasksIslandViewModel.ErrorReported — surfaces modal-owned failures in the footer strip.
     public event Action<string>? ErrorReported;
 
+    // Same strip, but for an action that succeeded and has a result worth showing.
+    public event Action<string>? SuccessReported;
+
     public IDialogService? Dialogs { get; set; }
 
     [RelayCommand]
@@ -528,10 +531,7 @@ public sealed partial class ListsIslandViewModel : ViewModelBase, IDisposable
         try
         {
             var result = await _worker.ImportTicketsAsync(rawId);
-            // No FlashFooterInfo variant exists in this project — the footer strip only has an
-            // error channel (ErrorReported -> IslandsShellViewModel.FlashFooterError). A silent
-            // success is the worse option, so the result reuses the same channel.
-            ErrorReported?.Invoke(Loc.T("lists.importTicketsResult", result.Examined, result.Created));
+            SuccessReported?.Invoke(Loc.T("lists.importTicketsResult", result.Examined, result.Created));
         }
         catch (Exception ex)
         {

src/ClaudeDo.Ui/ViewModels/IslandsShellViewModel.cs

@@ -190,10 +190,17 @@ public sealed partial class IslandsShellViewModel : ViewModelBase, IDisposable
 
     // Surfaces a UI-originated failure in the footer status strip (same line as the
     // worker log), color-coded as an error and auto-cleared by _clearTimer.
-    public void FlashFooterError(string message)
+    public void FlashFooterError(string message) => FlashFooter(message, WorkerLogLevel.Error);
+
+    // Same strip, for an action that succeeded and has something to report ("3 new tasks").
+    // The strip has always carried a level — routing a success through FlashFooterError would
+    // paint a good outcome red, which reads as a failure.
+    public void FlashFooterSuccess(string message) => FlashFooter(message, WorkerLogLevel.Success);
+
+    private void FlashFooter(string message, WorkerLogLevel level)
     {
         WorkerLogText = $"{DateTime.Now:HH:mm} · {message}";
-        WorkerLogLevel = WorkerLogLevel.Error;
+        WorkerLogLevel = level;
         IsWorkerLogVisible = true;
         _clearTimer.Stop();
         _clearTimer.Start();
@@ -337,6 +344,7 @@ public sealed partial class IslandsShellViewModel : ViewModelBase, IDisposable
         Tasks.PrepRequested += () => Details.ShowPrep();
         Tasks.ErrorReported += FlashFooterError;
         Lists.ErrorReported += FlashFooterError;
+        Lists.SuccessReported += FlashFooterSuccess;
         Tasks.OpenConPtySessionRequested += taskId =>
         {
             OpenMissionControl();