docs(ja): translate cacheSignal page

[nihar-ux18]

This PR translates the cacheSignal documentation page into Japanese.

Changes

• Translated src/content/reference/react/cacheSignal.md from English to Japanese.
• Preserved the original Markdown structure, code examples, and links.
• Followed the repository's Japanese writing conventions and passed the lint checks.

Closes #933

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1 Skipped Deployment

Project	Deployment	Actions	Updated
legacy-ja-reactjs-org	Ignored	Preview	Sep 4, 2026 2:34pm UTC

[nihar-ux18]

Hi @gobo-cello,

I've opened a PR for the cacheSignal translation. When you have a chance, I'd appreciate it if you could take a look. Thank you!

[github-actions]

Size changes

Details

📦 Next.js Bundle Analysis for react-dev

This analysis was generated by the Next.js Bundle Analysis action. 🤖

This PR introduced no changes to the JavaScript bundle! 🙌

[honey32]

Thank you very much!

I've found a few points to improve,

[nihar-ux18]

@honey32 Thanks for the review! I have addressed the suggested translation changes.

[nihar-ux18]

@honey32 Thanks! I've applied the suggested change.

[honey32]

Thank you very much! LGTM!

wait for @smikitky 's review

[nihar-ux18]

Hi @smikitky,

Just following up on this PR. I've addressed all the review feedback from @honey32, and the PR has been approved on their side.

When you have some time, I'd appreciate it if you could review this PR as well.

Thank you!

[honey32]

while smikitky not responding, I'll review on my own CAREFULLY once more in case of his not returning.

I'm sorry it will take time bc I often have hard-to-read headache, and have to share my healthy time for regular work, driving lesson, and or some other tasks.

[smikitky]

すみません、来週までお待ちください…

[smikitky]

遅くなり申し訳ありません。用語の統一とガイドライン準拠をお願いします。

• 「レンダリング」ではなくて「レンダー」です（文脈に応じて「レンダー処理」とかでも構いません）。
• 「注意事項」ではなく「注意点」です。
• 「パラメータ」ではなく「引数」です。
• 「使用方法」ではなく「使用法」です。
• 「Client Components」ではなく「クライアントコンポーネント」です。
• コード内のコメントを翻訳しないようにしてください。

[nihar-ux18]

Hi @smikitky,

Thank you for the review. I’ve addressed all the requested changes, including the terminology updates and restoring the original English comments in the code.

Could you please review the changes when you have a chance? Thank you!