feat: implement install mode detection and update commands in version upgrade process

src/i18n/locales/en/common.json

@@ -200,6 +200,7 @@
     "viewFullRelease": "View full release",
     "updateProgress": "Update Progress:",
     "manualUpgrade": "Manual upgrade:",
+    "npmUpgradeCommand": "npm install -g @siteboon/claude-code-ui@latest",
     "manualUpgradeHint": "Or click \"Update Now\" to run the update automatically.",
     "updateCompleted": "Update completed successfully!",
     "restartServer": "Please restart the server to apply changes.",

src/i18n/locales/ja/common.json

@@ -200,6 +200,7 @@
     "viewFullRelease": "リリース全文を見る",
     "updateProgress": "アップデートの進捗:",
     "manualUpgrade": "手動アップグレード:",
+    "npmUpgradeCommand": "npm install -g @siteboon/claude-code-ui@latest",
     "manualUpgradeHint": "または「今すぐ更新」をクリックして自動的にアップデートを実行できます。",
     "updateCompleted": "アップデートが完了しました！",
     "restartServer": "変更を適用するにはサーバーを再起動してください。",

src/i18n/locales/ko/common.json

@@ -200,6 +200,7 @@
     "viewFullRelease": "전체 릴리스 보기",
     "updateProgress": "업데이트 진행 상황:",
     "manualUpgrade": "수동 업그레이드:",
+    "npmUpgradeCommand": "npm install -g @siteboon/claude-code-ui@latest",
     "manualUpgradeHint": "또는 \"지금 업데이트\"를 클릭하여 자동으로 업데이트합니다.",
     "updateCompleted": "업데이트가 완료되었습니다!",
     "restartServer": "변경사항을 적용하려면 서버를 재시작하세요.",

src/i18n/locales/zh-CN/common.json

@@ -200,6 +200,7 @@
     "viewFullRelease": "查看完整发布",
     "updateProgress": "更新进度：",
     "manualUpgrade": "手动升级：",
+    "npmUpgradeCommand": "npm install -g @siteboon/claude-code-ui@latest",
     "manualUpgradeHint": "或点击'立即更新'以自动运行更新。",
     "updateCompleted": "更新成功完成！",
     "restartServer": "请重启服务器以应用更改。",