feat(web): 工单页与升级面板，修掉视图竞态与标签缺失导致的崩溃

- 新增 /w/:wsId/tickets：派给我的 / 我发起的、状态过滤、列表内联快操作
- 详情抽屉按角色显示受理/开工/提交/验收/驳回/改派/取消；任务态底部可升级成工单
- 导航抽成 WorkspaceNav，带未读角标（30 秒对齐，操作后立刻刷新）
- 修竞态：切视图/切 tab 连发请求时，慢的回包会把新结果盖掉（reqId 序号丢弃过期响应）
- 登录支持 ?next= 站内回跳，邀请链接不再'登录完掉回首页'
- e2e/tickets.mjs：双人双上下文的完整闭环，8 项断言全绿

web/src/pages/Board.tsx

@@ -1,7 +1,8 @@
 import { useCallback, useEffect, useMemo, useState } from "react";
-import { Link, useParams } from "react-router-dom";
+import { useParams } from "react-router-dom";
 import { Layout } from "../components/Layout";
 import { TaskDetail } from "../components/TaskDetail";
+import { WorkspaceNav } from "../components/WorkspaceNav";
 import { ApiError, api } from "../lib/client";
 import { PRIORITY_LABEL, STATUS_LABEL, canTransition } from "../lib/parse";
 import type { Item, ItemStatus } from "../lib/types";
@@ -24,7 +25,7 @@ interface BatchResult {
 }
 
 export function BoardPage() {
-  const { wsId } = useParams<{ wsId: string }>();
+  const { wsId = "" } = useParams<{ wsId: string }>();
   const [columns, setColumns] = useState<Record<string, Item[]>>({});
   const [selected, setSelected] = useState<Set<string>>(new Set());
   const [dragId, setDragId] = useState<string | null>(null);
@@ -143,14 +144,7 @@ export function BoardPage() {
             拖卡片改状态；勾选后可以批量移动。状态机不允许的组合会直接拒绝并说明原因。
           </p>
         </div>
-        <div className="flex items-center gap-3 text-sm">
-          <Link to={`/w/${wsId}`} className="text-ink-500 hover:text-ink-900">
-            列表
-          </Link>
-          <Link to={`/w/${wsId}/members`} className="text-ink-500 hover:text-ink-900">
-            成员
-          </Link>
-        </div>
+        <WorkspaceNav wsId={wsId} />
       </div>
 
       {selectedItems.length > 0 && (