# T012 — Wizard: topic + crew (lead/cast)

> Status: `todo`  
> Milestone: `M5`  
> Est. change: `~160 lines`

## Goal

步驟 1 主題、步驟 2 船隊：選 1 lead + 多選 cast；不可選 error 帳號。

## Depends on

- T011

## Inputs

- Spec §4.3 步驟 1–2；Crew accounts from repos

## Outputs

### 程式變更

| 路徑 | 動作 | 說明 |
|------|------|------|
| `apps/web/src/pages/studio/steps/TopicStep.tsx` | add | |
| `apps/web/src/pages/studio/steps/CrewStep.tsx` | add | radio lead + multi cast |
| WizardPage | edit | 接入 |

### 行為變更

- cast 列表預設不重複勾 lead（lead 仍是 lead）  
- 未選 lead 不可進下一步

## Out of scope

- 劇本步驟（T013）

## Acceptance

- [ ] 必須選 lead  
- [ ] 可多選 cast  
- [ ] error 帳號 disabled  
- [ ] `npm run build` 通過

```bash
cd apps/web && npm run build
```