Decouple theme provider from messaging bridge

[noisysocks]

Asana Task/Github Issue: N/A

Description

Refactors the ThemeProvider in the history special page to improve encapsulation. Instead of directly subscribing to theme updates via history.messaging.subscribe, ThemeProvider now calls a new onThemeUpdate method on the HistoryPage instance. This centralizes messaging bridge interactions within HistoryPage, aligning with patterns used in other special pages.

Testing Steps

• Navigate to the History special page.
• Change your system's theme (e.g., light/dark mode) and verify the History page theme updates correctly.
• All existing history theme integration tests pass.

Checklist

Please tick all that apply:

• I have tested this change locally
• I have tested this change locally in all supported browsers
• This change will be visible to users
• I have added automated tests that cover this change
• I have ensured the change is gated by config
• This change was covered by a ship review
• This change was covered by a tech design
• Any dependent config has been merged

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Note

Adds HistoryPage.onThemeUpdate and updates ThemeProvider to subscribe via this API instead of accessing messaging directly.

• HistoryPage API (special-pages/pages/history/src/index.js):
  • Add onThemeUpdate(callback) that delegates to this.messaging.subscribe('onThemeUpdate', callback).
• ThemeProvider (special-pages/pages/history/app/global/Providers/ThemeProvider.js):
  • Replace direct history.messaging.subscribe('onThemeUpdate', ...) with history.onThemeUpdate(...) for theme updates.

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[github-actions]

Temporary Branch Update

The temporary branch has been updated with the latest changes. Below are the details:

• Branch Name: pr-releases/pr-2074
• Commit Hash: d7edf78463d9da98eac1208669c1f57f821c7aff
• Last Updated: December 4, 2025 at 10:58:41 PM UTC
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[Beta] Generated file diff

Time updated: Thu, 04 Dec 2025 22:59:02 GMT

Apple

    - apple/pages/history/dist/index.js

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Integration

    - integration/pages/history/dist/index.js

File has changed

Windows

    - windows/pages/history/dist/index.js

File has changed