refactor(teams): move workspace button from header to board toolbar

Move workspace button to toolbar (left of Kanban/List toggle) with
FolderOpen icon + text label for better discoverability.

ui/web/src/pages/teams/board/board-container.tsx

@@ -24,11 +24,12 @@ interface BoardContainerProps {
   getTeamTasks: (teamId: string, status?: string, channel?: string, chatId?: string) => Promise<{ tasks: TeamTaskData[]; count: number }>;
   getTaskDetail: (teamId: string, taskId: string) => Promise<{ task: TeamTaskData; comments: TeamTaskComment[]; events: TeamTaskEvent[]; attachments: TeamTaskAttachment[] }>;
   deleteTask?: (teamId: string, taskId: string) => Promise<void>;
+  onWorkspace?: () => void;
 }
 
 export const BoardContainer = memo(function BoardContainer({
   teamId, members, scopes, isTeamV2,
-  getTeamTasks, getTaskDetail, deleteTask,
+  getTeamTasks, getTaskDetail, deleteTask, onWorkspace,
 }: BoardContainerProps) {
   const { t } = useTranslation("teams");
   const viewMode = useBoardStore((s) => s.viewMode);
@@ -133,6 +134,7 @@ export const BoardContainer = memo(function BoardContainer({
         spinning={refreshing}
         onRefresh={handleRefresh}
         onCreateTask={handleCreateTask}
+        onWorkspace={onWorkspace}
       />
 
       <div className="flex flex-1 flex-col min-h-0 overflow-hidden">

ui/web/src/pages/teams/board/board-header.tsx

@@ -1,6 +1,6 @@
 import { Button } from "@/components/ui/button";
 import { Badge } from "@/components/ui/badge";
-import { ArrowLeft, Settings, Trash2, FolderOpen, Users } from "lucide-react";
+import { ArrowLeft, Settings, Trash2, Users } from "lucide-react";
 import { useTranslation } from "react-i18next";
 import type { TeamData, TeamMemberData, TeamAccessSettings } from "@/types/team";
 
@@ -11,11 +11,10 @@ interface BoardHeaderProps {
   onDelete: () => void;
   onSettings: () => void;
   onMembers: () => void;
-  onWorkspace: () => void;
   onV2Click?: () => void;
 }
 
-export function BoardHeader({ team, members, onBack, onDelete, onSettings, onMembers, onWorkspace, onV2Click }: BoardHeaderProps) {
+export function BoardHeader({ team, members, onBack, onDelete, onSettings, onMembers, onV2Click }: BoardHeaderProps) {
   const { t } = useTranslation("teams");
   const settings = (team.settings ?? {}) as TeamAccessSettings;
   const isV2 = (settings.version ?? 1) >= 2;
@@ -62,9 +61,6 @@ export function BoardHeader({ team, members, onBack, onDelete, onSettings, onMem
       <Button variant="ghost" size="icon" onClick={onMembers} className="shrink-0" title={t("members.title")}>
         <Users className="h-4 w-4" />
       </Button>
-      <Button variant="ghost" size="icon" onClick={onWorkspace} className="shrink-0" title={t("workspace.title")}>
-        <FolderOpen className="h-4 w-4" />
-      </Button>
       <Button variant="ghost" size="icon" onClick={onSettings} className="shrink-0" title={t("detail.tabs.settings")}>
         <Settings className="h-4 w-4" />
       </Button>

ui/web/src/pages/teams/board/board-toolbar.tsx

@@ -3,7 +3,7 @@ import { Button } from "@/components/ui/button";
 import {
   Select, SelectContent, SelectItem, SelectTrigger, SelectValue,
 } from "@/components/ui/select";
-import { RefreshCw, Plus, LayoutGrid, List } from "lucide-react";
+import { RefreshCw, Plus, LayoutGrid, List, FolderOpen } from "lucide-react";
 import { useTranslation } from "react-i18next";
 import { useBoardStore } from "../stores/use-board-store";
 import type { GroupBy } from "../stores/use-board-store";
@@ -20,6 +20,7 @@ interface BoardToolbarProps {
   spinning: boolean;
   onRefresh: () => void;
   onCreateTask: () => void;
+  onWorkspace?: () => void;
 }
 
 const STATUS_FILTERS: { value: StatusFilter; labelKey: string }[] = [
@@ -37,7 +38,7 @@ const GROUP_OPTIONS: { value: GroupBy; labelKey: string }[] = [
 export const BoardToolbar = memo(function BoardToolbar({
   statusFilter, onStatusFilter,
   scopes, selectedScope, onScopeChange,
-  spinning, onRefresh, onCreateTask,
+  spinning, onRefresh, onCreateTask, onWorkspace,
 }: BoardToolbarProps) {
   const { t } = useTranslation("teams");
   const { viewMode, setViewMode, groupBy, setGroupBy } = useBoardStore();
@@ -109,6 +110,14 @@ export const BoardToolbar = memo(function BoardToolbar({
       </div>
 
       <div className="flex items-center gap-2">
+        {/* Workspace */}
+        {onWorkspace && (
+          <Button variant="outline" size="sm" onClick={onWorkspace} className="gap-1.5 h-8 text-xs">
+            <FolderOpen className="h-3.5 w-3.5" />
+            {t("workspace.title")}
+          </Button>
+        )}
+
         {/* View toggle */}
         <div className="flex rounded-lg border bg-muted/50 p-0.5">
           <button

ui/web/src/pages/teams/team-detail-page.tsx

@@ -89,7 +89,6 @@ export function TeamDetailPage({ teamId, onBack }: TeamDetailPageProps) {
         onDelete={() => setDeleteOpen(true)}
         onSettings={() => setInfoOpen(true)}
         onMembers={() => setMembersOpen(true)}
-        onWorkspace={() => setWorkspaceOpen(true)}
         onV2Click={() => setVersionModalOpen(true)}
       />
 
@@ -101,6 +100,7 @@ export function TeamDetailPage({ teamId, onBack }: TeamDetailPageProps) {
         getTeamTasks={getTeamTasks}
         getTaskDetail={getTaskDetail}
         deleteTask={deleteTask}
+        onWorkspace={() => setWorkspaceOpen(true)}
       />
 
       {/* Team info + settings + members dialog */}