feat(task): add 'creating' status to task interface and update UI components

[yashdev9274]

fix #1032

• Updated Task interface to include a new 'creating' status.
• Modified RightSidebar, TaskItem, and TaskTerminalPanel components to handle the new status.
• Enhanced TaskItem to display a Creating... message when the task is in the 'creating' state.
• Implemented optimistic UI updates in taskCreationService for immediate feedback during task creation.

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[greptile-apps]

Greptile Summary

Added creating status to the Task interface and implemented optimistic UI updates during task creation. When a single-agent task is created, an optimistic task with status: 'creating' is immediately added to the UI (showing a spinner and "Creating..." text), then replaced with the real task once worktree creation and DB persistence complete. This provides instant feedback during the 3-7 second worktree creation delay.

Key changes:

• Added 'creating' to task status union type across all components
• TaskItem displays spinner and "Creating..." text for tasks in creating state
• taskCreationService creates optimistic task with temporary ID before worktree creation
• Optimistic task is replaced with real task after successful creation

Issue found:

• Missing cleanup of optimistic task on error - if task creation fails, the optimistic task remains stuck in UI with "Creating..." status

Confidence Score: 4/5

• Safe to merge after fixing the error cleanup issue
• Implementation is solid and follows the existing multi-agent optimistic pattern, but needs error handling to remove orphaned optimistic tasks on failure
• src/renderer/lib/taskCreationService.ts requires error handling fix for optimistic task cleanup

Important Files Changed

Filename	Overview
src/renderer/types/chat.ts	Added 'creating' status to Task interface status union type
src/renderer/components/TaskItem.tsx	Updated to handle 'creating' status with spinner and "Creating..." text
src/renderer/lib/taskCreationService.ts	Implemented optimistic UI updates with 'creating' status; missing error cleanup for optimistic task

_{Last reviewed commit: ae1d1fc}

[greptile-apps]

_{5 files reviewed, 1 comment}

_{Edit Code Review Agent Settings | Greptile}

[greptile-apps]

Additional Comments (1)

src/renderer/lib/taskCreationService.ts
optimistic task cleanup missing on error

when task creation fails, the optimistic task with status: 'creating' remains in state and UI

  } catch (error) {
    const { log } = await import('./logger');
    log.error('Failed to create task:', error as any);

    // Remove optimistic task if it was created
    if (optimisticTaskId) {
      setProjects((prev) =>
        prev.map((project) =>
          project.id === selectedProject.id
            ? { ...project, tasks: project.tasks?.filter((t) => t.id !== optimisticTaskId) }
            : project
        )
      );
      setSelectedProject((prev) =>
        prev ? { ...prev, tasks: prev.tasks?.filter((t) => t.id !== optimisticTaskId) } : null
      );
      setActiveTask((current) => (current?.id === optimisticTaskId ? null : current));
    }

    callbacks.toast({
      title: 'Error',
      description:
        (error as Error)?.message || 'Failed to create task. Please check the console for details.',
    });
    return false;
  }

[yashdev9274]

@arnestrickmann @rabanspiegel I've raised PR for #1032 issue. do lmk if any changes needed