feat: 補齊規格缺漏（狀態列顯示思考程度、動漫層與主題色、萃取角色包可啟動）

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

hooks/extractCommand.ts

@@ -95,6 +95,14 @@ async function buildPlan($: Engine, p: Pending): Promise<Plan | string> {
     lines.push(`- 角色 ${p.workSlug}-${slug}（${c.name}）：${m.action}，${m.detail}${m.conflicts.length ? `，${m.conflicts.length} 項衝突待確認` : ''}`)
     conflicts.push(...m.conflicts)
   }
+  // 索引讓啟動時能找到角色包（外掛更新後 characters/ 在外掛目錄內）。
+  const indexPath = `${p.root}/characters/index.json`
+  const index = (await readJson<{ packs: { work: string; workName: string; slug: string }[] }>($, indexPath)) ?? { packs: [] }
+  for (const c of p.extracted.characters) {
+    const slug = p.slugs[slugKey(c)]!
+    if (!index.packs.some(x => x.work === p.workSlug && x.slug === slug)) index.packs.push({ work: p.workSlug, workName: p.extracted.work.name, slug })
+  }
+  files.push({ path: indexPath, json: index })
   if (errors.length) return `角色包 schema 驗證失敗，尚未寫入任何檔案：\n${errors.map(e => `- ${e}`).join('\n')}`
   return { files, lines, conflicts, workSlug: p.workSlug, workName: p.extracted.work.name }
 }