feat(ui): add config override fields to TaskEditorView

Adds Model, SystemPrompt, and AgentPath override fields to TaskEditorViewModel and TaskEditorView. Wires agent loading from WorkerClient in TaskListViewModel before opening the editor dialog.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/ClaudeDo.Ui/ViewModels/TaskEditorViewModel.cs

@@ -1,4 +1,5 @@
 using ClaudeDo.Data.Models;
+using ClaudeDo.Ui.Services;
 using CommunityToolkit.Mvvm.ComponentModel;
 using CommunityToolkit.Mvvm.Input;
 using TaskStatus = ClaudeDo.Data.Models.TaskStatus;
@@ -13,6 +14,10 @@ public partial class TaskEditorViewModel : ViewModelBase
     [ObservableProperty] private string _statusChoice = "manual";
     [ObservableProperty] private string _tagsInput = "";
     [ObservableProperty] private string _windowTitle = "New Task";
+    [ObservableProperty] private string _modelChoice = "(list default)";
+    [ObservableProperty] private string? _systemPromptOverride;
+    [ObservableProperty] private AgentInfo? _selectedAgent;
+    public List<AgentInfo> AvailableAgents { get; set; } = [];
 
     private string? _editId;
     private string _listId = "";
@@ -21,12 +26,19 @@ public partial class TaskEditorViewModel : ViewModelBase
 
     public event Action? RequestClose;
 
+    public static string[] ModelChoices { get; } = ["(list default)", "Sonnet", "Opus", "Haiku"];
+
     public static string[] CommitTypes { get; } =
         ["chore", "feat", "fix", "refactor", "docs", "test", "perf", "style", "build", "ci"];
 
     public static string[] StatusChoices { get; } =
         ["manual", "queued"];
 
+    public async Task LoadAgentsAsync(WorkerClient worker)
+    {
+        AvailableAgents = await worker.GetAgentsAsync();
+    }
+
     public IReadOnlyList<string> SelectedTagNames =>
         TagsInput.Split(',', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries)
             .Distinct()
@@ -56,6 +68,13 @@ public partial class TaskEditorViewModel : ViewModelBase
             _ => entity.Status.ToString().ToLowerInvariant(),
         };
         TagsInput = string.Join(", ", taskTags.Select(t => t.Name));
+        ModelChoice = entity.Model is not null
+            ? ListEditorViewModel.ModelIdToDisplay(entity.Model)
+            : "(list default)";
+        SystemPromptOverride = entity.SystemPrompt;
+        SelectedAgent = entity.AgentPath is not null
+            ? AvailableAgents.FirstOrDefault(a => a.Path == entity.AgentPath)
+            : null;
         WindowTitle = $"Edit Task: {entity.Title}";
     }
 
@@ -78,6 +97,11 @@ public partial class TaskEditorViewModel : ViewModelBase
             CommitType = CommitType,
             CreatedAt = _createdAt,
         };
+        entity.Model = ModelChoice != "(list default)"
+            ? ListEditorViewModel.ModelDisplayToId(ModelChoice)
+            : null;
+        entity.SystemPrompt = string.IsNullOrWhiteSpace(SystemPromptOverride) ? null : SystemPromptOverride.Trim();
+        entity.AgentPath = SelectedAgent?.Path;
         _tcs.TrySetResult(entity);
         RequestClose?.Invoke();
     }

src/ClaudeDo.Ui/ViewModels/TaskListViewModel.cs

@@ -146,6 +146,7 @@ public partial class TaskListViewModel : ViewModelBase
         var defaultCommitType = list?.DefaultCommitType ?? "chore";
 
         var editor = _editorFactory();
+        await editor.LoadAgentsAsync(_worker);
         editor.InitForCreate(CurrentListId, defaultCommitType);
 
         var window = new TaskEditorView { DataContext = editor };
@@ -191,6 +192,7 @@ public partial class TaskListViewModel : ViewModelBase
 
         var taskTags = await _taskRepo.GetTagsAsync(entity.Id);
         var editor = _editorFactory();
+        await editor.LoadAgentsAsync(_worker);
         editor.InitForEdit(entity, taskTags);
 
         var window = new TaskEditorView { DataContext = editor };