refactor: 去掉"联调"阶段，新增"BUG"阶段胶囊

- Stage 类型去掉 integration，新增 bug
- 胶囊条：调研 → 产品设计 → UI设计 → 开发 → 测试 → BUG → 上线
- BUG 阶段进度 = 已关闭Bug / 总Bug
- 全部关闭 = done（绿色），有Bug未关闭 = active（蓝色）
- 版本列表/项目详情的阶段筛选同步去掉联调

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/web/lib/health.ts

@@ -17,8 +17,8 @@ const STAGE_ROLE_MAP: Record<string, Role[]> = {
   product_design: ['product'],
   ui_design: ['ui'],
   dev: ['frontend', 'backend'],
-  integration: ['frontend', 'backend'],
   testing: ['testing'],
+  bug: [],
   released: [],
 };