fix(claude-do): Fix: Statuswechsel schlägt in Task-Row und Detail-Pane erst

## Problem (vom Nutzer bestätigt am 2026-08-05)
Wechselt ein Task den Status, bleiben zwei Stellen stehen, bis man die Liste wechselt und zurückwechselt:

1. **Task-Row in der offenen Liste** (mittlere Insel) — Status-Chip und Gruppen-Einordnung aktualisieren sich nicht.
2. **Detail-Pane des ausgewählten Tasks** (rechte Insel) — Status, Review-Buttons und Header-Bar zeigen weiter den alten Zustand

ClaudeDo-Task: 181d4abf368046b99bd57d5e2a7ab97a

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

@@ -363,6 +363,10 @@ public sealed partial class DetailsIslandViewModel : ViewModelBase, IDisposable
         {
             if (Task?.IsPlanningParent == true) _ = RefreshPlanningChildAsync(taskId);
             _ = RefreshChildOutcomeAsync(taskId);
+            // The bound row's own status can change from outside (worker run, MCP tool, another
+            // session) — refresh it directly instead of relying on TasksIslandViewModel mutating
+            // the same instance, so the detail pane stays correct even if that row was replaced.
+            if (Task?.Id == taskId) _ = RefreshBoundTaskAsync(taskId);
         };
         _worker.TaskUpdatedEvent += _workerTaskUpdatedHandler;
 
@@ -764,6 +768,27 @@ public sealed partial class DetailsIslandViewModel : ViewModelBase, IDisposable
         catch { /* best-effort */ }
     }
 
+    // Refreshes the bound row itself (status, planning phase, worktree/branch mirrors, etc.) from
+    // the DB. Kept independent of TasksIslandViewModel's own handler: the row instance backing
+    // Task may have been replaced by a full list reload, so this must not assume it stayed live.
+    private async System.Threading.Tasks.Task RefreshBoundTaskAsync(string taskId)
+    {
+        try
+        {
+            await using var ctx = await _dbFactory.CreateDbContextAsync();
+            var entity = await ctx.Tasks
+                .AsNoTracking()
+                .Include(t => t.Worktree)
+                .Include(t => t.List)
+                .FirstOrDefaultAsync(t => t.Id == taskId);
+            if (entity is null || Task?.Id != taskId) return;
+            Task.UpdateFromEntity(entity);
+            OnPropertyChanged(nameof(CanPickUpInTerminal));
+            OnPropertyChanged(nameof(CanAcceptDrop));
+        }
+        catch { /* best-effort */ }
+    }
+
     private async System.Threading.Tasks.Task RefreshWorktreeAsync(string taskId)
     {
         try