feat(team): add OpenFang Team API client and WebSocket events

API Client (lib/team-client.ts):
- Team CRUD: listTeams, getTeam, createTeam, updateTeam, deleteTeam
- Member management: addTeamMember, removeTeamMember, updateMemberRole
- Task management: addTeamTask, updateTaskStatus, assignTask, submitDeliverable
- Dev↔QA loops: startDevQALoop, submitReview, updateLoopState
- Metrics & Events: getTeamMetrics, getTeamEvents, subscribeToTeamEvents
- TeamAPIError class for error handling

WebSocket Events (lib/useTeamEvents.ts):
- useTeamEvents hook for subscribing to team events
- useTeamEventStream hook for specific team events
- useAllTeamEvents hook for all team events
- Real-time task status updates
- Real-time Dev↔QA loop state changes
- Auto-refresh on team/member updates

Event Types:
- team.created/updated/deleted
- member.added/removed/status_changed
- task.created/assigned/status_changed/completed
- loop.started/state_changed/completed
- review.submitted

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

docs/SYSTEM_ANALYSIS.md

@@ -446,7 +446,9 @@ ZCLAW 是基于 **OpenFang** (Rust Agent OS) 的 AI Agent 桌面客户端，核
     * ✅ Sidebar 添加 Team 标签
     * ✅ App.tsx 添加 Team 视图渲染
     * ✅ 团队选择和状态管理
+  * API 客户端:
+    * ✅ Team API 客户端 (`lib/team-client.ts`)
+    * ✅ WebSocket 事件订阅 (`lib/useTeamEvents.ts`)
   * 待完成:
-    * OpenFang Team API 客户端
-    * WebSocket 实时事件同步
-*下一步: OpenFang API 对接与实时同步*
+    * 与 OpenFang 后端 API 对接测试
+*下一步: 后端 API 对接测试与集成验证*