chore(i18n): auto-update translations via LLM

frontend/translations/ja.json

@@ -607,10 +607,12 @@
   "language.lv": "ラトビア語",
   "language.nb": "ノルウェー語",
   "language.nl": "オランダ語",
+  "language.no_results": "言語が見つかりません",
   "language.pl": "ポーランド語",
   "language.pt": "ポルトガル語",
   "language.ro": "ルーマニア語",
   "language.ru": "ロシア語",
+  "language.search_placeholder": "言語を検索\n0",
   "language.selector": "言語",
   "language.selector_label": "言語を選択",
   "language.sk": "スロバキア語",