🎨 Palette: Add ARIA labels to diff view buttons

[cbavidge1989-ctrl]

• 💡 What: Added aria-label attributes ("Undo changes", "Keep changes") to the Undo and Keep buttons in the diff viewer.
• 🎯 Why: To provide better context for screen reader users when interacting with these buttons.
• ♿ Accessibility: Improved screen reader announcements for critical actions in the diff viewer by adding semantic meaning that expands on the visible text.

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PR created automatically by Jules for task 1074965069224891406 started by @cbavidge1989-ctrl

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[Copilot]

Pull request overview

Improves accessibility in the server-hosted diff viewer UI by giving the primary action buttons more descriptive accessible names for screen readers.

Changes:

• Added aria-label="Undo changes" to the Undo action button in the diff viewer header.
• Added aria-label="Keep changes" to the Keep action button in the diff viewer header.
• Added a short Palette note documenting the accessibility rationale and follow-up action.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
Server/src/diffView/diffView.html	Adds ARIA labels to the Undo/Keep buttons to improve screen reader context.
.Jules/palette.md	Documents the accessibility learning/action for consistent future application.

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