feat(client): name the Fleet task board in the harness's own terms

The card titled itself 任务看板 / Task Board while its empty state already
quoted the harness's agent-team UI verbatim (暂无共享任务，可以通过对话创建).
The title now carries the same term the harness's client-ui-agent-team
serves (共享任务 / Shared tasks), the two member-card tips follow
(在共享任务中…), and the subtitle describes the card as the agent team's
shared task list (智能体团队共享任务清单).

src/client/i18nEn.ts

@@ -254,12 +254,12 @@ export const DICT_EN = {
   'fleet.members.reply': 'Latest reply:',
   'fleet.members.tasks': '{n} active tasks',
   'fleet.members.noTasks': 'no active tasks',
-  'fleet.members.tasksTip': 'Show only this member on the task board',
-  'fleet.tasks.title': 'Task Board',
-  'fleet.tasks.sub': 'Shared tasks and dependencies · read-only',
+  'fleet.members.tasksTip': 'Show only this member in the shared tasks',
+  'fleet.tasks.title': 'Shared tasks',
+  'fleet.tasks.sub': 'The agent team\'s shared task list',
   'fleet.tasks.ownerTip': 'Pin this member in the inspector',
   'fleet.tasks.depTip': 'depends on {id} · click to locate',
-  'fleet.tasks.focusTip': 'Locate on the task board',
+  'fleet.tasks.focusTip': 'Locate in the shared tasks',
   'fleet.tasks.dependsOn': 'depends on',
   'fleet.tasks.noMatch': 'No tasks for this member',
   'fleet.taskCol.pending': 'Pending',

src/client/i18nZh.ts

@@ -252,12 +252,12 @@ export const DICT_ZH = {
   'fleet.members.reply': '最新回报',
   'fleet.members.tasks': '{n} 项进行中任务',
   'fleet.members.noTasks': '无进行中任务',
-  'fleet.members.tasksTip': '在任务看板中只看该成员',
-  'fleet.tasks.title': '任务看板',
-  'fleet.tasks.sub': '共享任务与依赖 · 只读',
+  'fleet.members.tasksTip': '在共享任务中只看该成员',
+  'fleet.tasks.title': '共享任务',
+  'fleet.tasks.sub': '智能体团队共享任务清单',
   'fleet.tasks.ownerTip': '在右侧详情中固定该成员',
   'fleet.tasks.depTip': '依赖 {id} · 点击定位',
-  'fleet.tasks.focusTip': '在任务看板中定位',
+  'fleet.tasks.focusTip': '在共享任务中定位',
   'fleet.tasks.dependsOn': '依赖',
   'fleet.tasks.noMatch': '该成员当前没有任务',
   'fleet.taskCol.pending': '待处理',