chore: improve Japanese language locales (#554)

public/locales/ja/chat.json

@@ -16,7 +16,7 @@
   "Error fetching models.": "モデルの取得中にエラーが発生しました。",
   "AI": "AI",
   "You": "あなた",
-  "Cancel": "Cancel",
+  "Cancel": "キャンセル",
   "Save & Submit": "Save & Submit",
   "Make sure your OpenAI API key is set in the bottom left of the sidebar.": "OpenAIのAPIキーがサイドバーの左下に設定されていることを確認してください。",
   "If you completed this step, OpenAI may be experiencing issues.": "このステップを完了した場合、OpenAIに問題が発生している可能性があります。",

public/locales/ja/promptbar.json

@@ -1,12 +1,12 @@
 {
-  "New prompt": "New prompt",
+  "New prompt": "新しいプロンプト",
-  "New folder": "New folder",
+  "New folder": "新しいフォルダ",
-  "No prompts.": "No prompts.",
+  "No prompts.": "プロンプトはありません",
-  "Search prompts...": "Search prompts...",
+  "Search prompts...": "プロンプトの検索...",
-  "Name": "Name",
+  "Name": "名前",
-  "Description": "Description",
+  "Description": "説明",
-  "A description for your prompt.": "A description for your prompt.",
+  "A description for your prompt.": "プロンプトの説明",
-  "Prompt": "Prompt",
+  "Prompt": "プロンプト",
-  "Prompt content. Use {{}} to denote a variable. Ex: {{name}} is a {{adjective}} {{noun}}": "Prompt content. Use {{}} to denote a variable. Ex: {{name}} is a {{adjective}} {{noun}}",
+  "Prompt content. Use {{}} to denote a variable. Ex: {{name}} is a {{adjective}} {{noun}}": "プロンプトの内容。変数を表すには {{}} を使ってください。 例: {{name}} is a {{adjective}} {{noun}}",
-  "Save": "Save"
+  "Save": "保存"
 }

public/locales/ja/sidebar.json

@@ -3,7 +3,7 @@
   "New chat": "新規チャット",
   "No conversations.": "会話履歴はありません。",
   "Search conversations...": "会話を検索...",
-  "OpenAI API Key": "OpenAI API Key",
+  "OpenAI API Key": "OpenAI APIキー",
   "Import data": "会話履歴をインポート",
   "Are you sure?": "よろしいですか？",
   "Clear conversations": " 会話をクリア",