Add translation for 'recent_chat' in multiple languages and update AiAssistantChatInitialView to use the translation

apps/app/public/static/locales/en_US/translation.json

@@ -497,6 +497,7 @@
   },
   "sidebar_ai_assistant": {
     "reference_pages_label": "Reference pages",
+    "recent_chat": "Recent chat",
     "placeholder": "Ask me anything.",
     "knowledge_assistant_placeholder": "Ask me anything.",
     "editor_assistant_placeholder": "Can I help you with anything?",

apps/app/public/static/locales/fr_FR/translation.json

@@ -492,6 +492,7 @@
   },
   "sidebar_ai_assistant": {
     "reference_pages_label": "Pages de référence",
+    "recent_chat": "Chat récent",
     "knowledge_assistant_placeholder": "Demandez-moi n'importe quoi.",
     "editor_assistant_placeholder": "Puis-je vous aider ?",
     "summary_mode_label": "Mode résumé",

apps/app/public/static/locales/ja_JP/translation.json

@@ -530,6 +530,7 @@
   },
   "sidebar_ai_assistant": {
     "reference_pages_label": "参照するページ",
+    "recent_chat": "最近のチャット",
     "knowledge_assistant_placeholder": "ききたいことを入力してください",
     "editor_assistant_placeholder": "お手伝いできることはありますか？",
     "summary_mode_label": "要約モード",

apps/app/public/static/locales/zh_CN/translation.json

@@ -487,6 +487,7 @@
   },
   "sidebar_ai_assistant": {
     "reference_pages_label": "参考页面",
+    "recent_chat": "最近聊天",
     "knowledge_assistant_placeholder": "问我任何问题。",
     "editor_assistant_placeholder": "有什么需要帮忙的吗？",
     "summary_mode_label": "摘要模式",

apps/app/src/features/openai/client/components/AiAssistant/AiAssistantSidebar/AiAssistantChatInitialView.tsx

@@ -34,7 +34,9 @@ export const AiAssistantChatInitialView: React.FC<Props> = ({ description, pageP
         </div>
 
         <div className="mt-3">
-          <p className="text-body-secondary mb-0">最近のチャット</p>
+          <p className="text-body-secondary mb-0">
+            {t('sidebar_ai_assistant.recent_chat')}
+          </p>
           <ThreadList />
         </div>