feat(web-ui): add pinned sessions and live monitor in Chat (#118)

* feat: add single-page live session monitor and chat pinning

* fix: restore full test green after main merge

* fix: use Array.from instead of Set spread for ts-node compatibility

[...new Set()] requires downlevelIteration which isn't enabled in
ts-node dev mode, causing sonic-boom crash on startup.

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

---------

Co-authored-by: ekko <fqsy1416@gmail.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

packages/client/src/i18n/locales/zh.ts

@@ -86,6 +86,17 @@ export default {
     deleteSession: '确定删除此会话？',
     sessionDeleted: '会话已删除',
     rename: '重命名',
+    pin: '置顶',
+    unpin: '取消置顶',
+    pinned: '已置顶',
+    chatMode: '聊天',
+    liveMode: '实时',
+    liveSessions: '实时会话',
+    recentBadge: '最近',
+    linkedSessions: '关联 {count} 个会话',
+    noVisibleMessages: '没有人类可见消息。',
+    monitorRoleUser: '用户',
+    monitorRoleAssistant: '助手',
     copySessionId: '复制会话 ID',
     renamed: '已重命名',
     renameFailed: '重命名失败',
@@ -361,6 +372,10 @@ export default {
       idleMinutes: '空闲超时',
       idleMinutesHint: '无操作后自动重置的等待时间（分钟）',
       atHour: '定时重置时间',
+      humanOnly: '仅显示人类会话',
+      humanOnlyHint: '默认隐藏子代理和会话监看噪音',
+      liveMonitorHumanOnly: '实时监看：仅显示人类会话',
+      liveMonitorHumanOnlyHint: '在实时监看中默认隐藏子代理和会话监看噪音',
       atHourHint: '每天在指定小时重置会话',
     },
     privacy: {