🌐 Sync Translations + Update README Progress Table (#5581)

### Description of Changes

This Pull Request was automatically generated to synchronize updates to
translation files and documentation. Below are the details of the
changes made:

#### **1. Synchronization of Translation Files**
- Updated translation files
(`frontend/public/locales/*/translation.toml`) to reflect changes in the
reference file `en-GB/translation.toml`.
- Ensured consistency and synchronization across all supported language
files.
- Highlighted any missing or incomplete translations.
- **Format**: TOML

#### **2. Update README.md**
- Generated the translation progress table in `README.md` using
`counter_translation_v3.py`.
- Added a summary of the current translation status for all supported
languages.
- Included up-to-date statistics on translation coverage.

#### **Why these changes are necessary**
- Keeps translation files aligned with the latest reference updates.
- Ensures the documentation reflects the current translation progress.

---

Auto-generated by [create-pull-request][1].

[1]: https://github.com/peter-evans/create-pull-request

Co-authored-by: stirlingbot[bot] <195170888+stirlingbot[bot]@users.noreply.github.com>

frontend/public/locales/ja-JP/translation.toml

@@ -950,6 +950,7 @@ title = "サイズ・数による自動分割"
 desc = "サイズ・ページ数またはドキュメント数に基づいて、1つのPDFを複数のドキュメントに分割します。"
 
 [home.replaceColor]
+tags = "replace color,invert color,color replacement,swap colors,change color,invert,negative,color swap,find and replace color,convert color,color change"
 title = "色の置換と反転"
 desc = "PDF 文書の色を置換または反転"
 
@@ -964,18 +965,22 @@ title = "自動フォルダスキャン"
 desc = "自動フォルダスキャン ガイドへのリンク"
 
 [home.devSsoGuide]
+tags = "SSO,single sign-on,authentication,SAML,OAuth,OIDC,login,enterprise,identity provider,IdP"
 title = "SSO ガイド"
 desc = "SSO ガイドへのリンク"
 
 [home.devAirgapped]
+tags = "air-gapped,offline,isolated,no internet,disconnected,secure,network isolation,standalone"
 title = "エアギャップ設定"
 desc = "エアギャップ環境のセットアップガイドへのリンク"
 
 [home.addPassword]
+tags = "encrypt,password,lock,secure,protect,security,encryption,safeguard,confidential,private,restrict access"
 title = "パスワードの追加"
 desc = "PDFをパスワードで暗号化します。"
 
 [home.changePermissions]
+tags = "permissions,restrictions,rights,access control,allow,deny,printing,copying,editing,modify permissions,security settings,user rights"
 title = "権限の変更"
 desc = "文書の制限と権限を変更"
 
@@ -985,10 +990,12 @@ title = "自動化"
 desc = "PDF アクションを連結して複数ステップのワークフローを構築。繰り返し作業に最適です。"
 
 [home.overlay-pdfs]
+tags = "overlay,combine,merge,layer,superimpose,overlay PDF,layer PDFs,combine PDFs,stack,overlay pages,background,foreground,composite"
 desc = "1つのPDFを別のPDFの上に重ねます"
 title = "PDFを重ね合わせ"
 
 [home.pdfTextEditor]
+tags = "edit text,modify text,change text,edit content,update text,rewrite,correct,amend,redline,revise,text editor,content editor"
 title = "PDFテキストエディター"
 desc = "グループ化されたテキスト編集とPDF再生成で、Stirling PDF の JSON エクスポートをレビュー・編集します。"
 
@@ -4526,6 +4533,13 @@ description = "アカウントロックまでの最大失敗回数"
 label = "ログインリセット時間（分）"
 description = "失敗回数がリセットされるまでの時間"
 
+[admin.settings.security.xFrameOptions]
+label = "X-Frame-Options"
+description = "Controls whether the application can be embedded in iframes"
+deny = "Deny (Prevents all framing)"
+sameorigin = "Same Origin (Allow framing from same domain)"
+disabled = "Disabled (No X-Frame-Options header)"
+
 [admin.settings.security.csrfDisabled]
 label = "CSRF 保護を無効化"
 description = "クロスサイトリクエストフォージェリ保護を無効化（非推奨）"