feat(ui): wählbares Listen-Icon und aufgeräumter Task-Detail-Header

Listen bekommen eine Icon-Spalte (Migration AddListIcon) und einen Icon-Picker
in den Listeneinstellungen; 34 kuratierte Geometrien aus der Icon-Bibliothek,
Fallback auf "Folder" bei unbekanntem Key.

Der Metadata-Footer im Task-Detail entfällt; created-at wandert in die
Header-Zeile neben das ID-Badge, der Close-Button (und CloseDetailsCommand)
fällt weg.

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

@@ -295,7 +295,7 @@ public sealed partial class DetailsIslandViewModel : ViewModelBase, IDisposable
     private bool _suppressTitleSave;
     private CancellationTokenSource? _titleSaveCts;
 
-    // Set by shell so CloseDetailCommand can clear SelectedTask
+    // Set by shell so deleting a task can clear SelectedTask
     public Action? CloseDetail { get; set; }
 
     // Set by shell so DeleteTaskCommand can remove from list
@@ -1008,9 +1008,6 @@ public sealed partial class DetailsIslandViewModel : ViewModelBase, IDisposable
         }
     }
 
-    [RelayCommand]
-    private void CloseDetails() => CloseDetail?.Invoke();
-
     [RelayCommand]
     private async System.Threading.Tasks.Task ToggleStarAsync()
     {

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

@@ -24,6 +24,6 @@ public sealed partial class ListNavItemViewModel : ViewModelBase
     // Set while a dragged task hovers over this row as a move target — distinct from
     // DropHintAbove/Below, which mark an insertion point for list reordering.
     [ObservableProperty] private bool _isTaskDropTarget;
-    public string? IconKey { get; init; }
-    public string? DotColorKey { get; init; }
+    // Settable (not init) so a list-settings icon change refreshes the row in place.
+    [ObservableProperty] private string? _iconKey;
 }

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

@@ -54,7 +54,7 @@ public sealed partial class ListsIslandViewModel : ViewModelBase, IDisposable
         if (row is null || Dialogs is null || _services is null) return;
         var rawId = row.Id.StartsWith("user:", StringComparison.Ordinal) ? row.Id["user:".Length..] : row.Id;
         var vm = _services.GetRequiredService<ListSettingsModalViewModel>();
-        await vm.LoadAsync(rawId, row.Name, row.WorkingDir, row.DefaultCommitType, row.IsManual, row.FindingsTracked);
+        await vm.LoadAsync(rawId, row.Name, row.WorkingDir, row.DefaultCommitType, row.IsManual, row.FindingsTracked, row.IconKey);
         await Dialogs.ShowListSettingsAsync(vm);
         if (vm.Deleted) await LoadAsync();
         else await RefreshRowAsync(row.Id);
@@ -293,8 +293,6 @@ public sealed partial class ListsIslandViewModel : ViewModelBase, IDisposable
             await using var ctx = await _dbFactory.CreateDbContextAsync(ct);
             var lists = new ListRepository(ctx);
             var seedNames = new HashSet<string>(new[] { "My Day", "Important", "Planned" });
-            var dotColors = new[] { "Moss", "Peat", "Sage" };
-            int idx = 0;
             foreach (var l in await lists.GetAllAsync(ct))
             {
                 if (seedNames.Contains(l.Name)) continue;
@@ -304,8 +302,7 @@ public sealed partial class ListsIslandViewModel : ViewModelBase, IDisposable
                     Id = $"user:{l.Id}",
                     Name = l.Name,
                     Kind = ListKind.User,
-                    IconKey = "Folder",
-                    DotColorKey = dotColors[idx % dotColors.Length],
+                    IconKey = l.Icon ?? "Folder",
                     WorkingDir = l.WorkingDir,
                     DefaultCommitType = l.DefaultCommitType,
                     IsManual = l.IsManual,
@@ -314,7 +311,6 @@ public sealed partial class ListsIslandViewModel : ViewModelBase, IDisposable
                 };
                 Items.Add(item);
                 UserLists.Add(item);
-                idx++;
             }
             ok = true;
         }
@@ -395,7 +391,6 @@ public sealed partial class ListsIslandViewModel : ViewModelBase, IDisposable
             Name = entity.Name,
             Kind = ListKind.User,
             IconKey = "Folder",
-            DotColorKey = "Moss",
             WorkingDir = entity.WorkingDir,
             DefaultCommitType = entity.DefaultCommitType,
         };
@@ -407,7 +402,7 @@ public sealed partial class ListsIslandViewModel : ViewModelBase, IDisposable
         if (Dialogs is not null && _services is not null)
         {
             var vm = _services.GetRequiredService<ListSettingsModalViewModel>();
-            await vm.LoadAsync(entity.Id, entity.Name, entity.WorkingDir, entity.DefaultCommitType, entity.IsManual, entity.FindingsTracked);
+            await vm.LoadAsync(entity.Id, entity.Name, entity.WorkingDir, entity.DefaultCommitType, entity.IsManual, entity.FindingsTracked, entity.Icon);
             await Dialogs.ShowListSettingsAsync(vm);
             if (vm.Deleted) await LoadAsync();
             else await RefreshRowAsync(item.Id);
@@ -507,6 +502,7 @@ public sealed partial class ListsIslandViewModel : ViewModelBase, IDisposable
             row.DefaultCommitType = entity.DefaultCommitType;
             row.IsManual = entity.IsManual;
             row.FindingsTracked = entity.FindingsTracked;
+            row.IconKey = entity.Icon ?? "Folder";
             row.HasTicketProject = hasTicketProject;
             RecomputeHasNoLinkedRepo();
         }
@@ -547,14 +543,12 @@ public sealed partial class ListsIslandViewModel : ViewModelBase, IDisposable
     /// </summary>
     private async Task AddRowAsync(ListRepository lists, ListEntity entity, bool hasTicketProject = false)
     {
-        var dotColors = new[] { "Moss", "Peat", "Sage" };
         var item = new ListNavItemViewModel
         {
             Id = $"user:{entity.Id}",
             Name = entity.Name,
             Kind = ListKind.User,
-            IconKey = "Folder",
-            DotColorKey = dotColors[UserLists.Count % dotColors.Length],
+            IconKey = entity.Icon ?? "Folder",
             WorkingDir = entity.WorkingDir,
             DefaultCommitType = entity.DefaultCommitType,
             IsManual = entity.IsManual,