fix(i18n): add missing agents and usage tabs to zh-TW locale

ui/src/i18n/locales/zh-TW.ts

@@ -22,10 +22,12 @@ export const zh_TW: TranslationMap = {
     collapse: "折疊側邊欄",
   },
   tabs: {
+    agents: "代理",
     overview: "概覽",
     channels: "頻道",
     instances: "實例",
     sessions: "會話",
+    usage: "使用情況",
     cron: "定時任務",
     skills: "技能",
     nodes: "節點",
@@ -35,10 +37,12 @@ export const zh_TW: TranslationMap = {
     logs: "日誌",
   },
   subtitles: {
+    agents: "管理代理工作區、工具和身份。",
     overview: "網關狀態、入口點和快速健康讀取。",
     channels: "管理頻道和設置。",
     instances: "來自已連接客戶端和節點的在線信號。",
     sessions: "檢查活動會話並調整每個會話的默認設置。",
+    usage: "監控 API 使用情況和成本。",
     cron: "安排喚醒和重複的代理運行。",
     skills: "管理技能可用性和 API 密鑰注入。",
     nodes: "配對設備、功能和命令公開。",