fix: sync reveal-menu i18n keys across all locales

[AbdoKnbGit]

Issue for this PR

Closes #36292

Type of change

• Bug fix
• New feature
• Refactor / code improvement
• Documentation

What does this PR do?

Adds the missing session.header.reveal.* translation keys to the non-English locales. These keys were added to the English locale (en.ts) in a prior change but were not propagated to the other locale files, causing the i18n parity test to fail.

How did you verify your code works?

Ran bun test src/i18n/parity.test.ts from packages/app — all 4 tests pass.

Checklist

• I have tested my changes locally
• I have not included unrelated changes in this PR

[github-actions]

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