🎨 Palette: Enhance accessibility of background music toggles

[billlzzz10]

💡 What:
Added aria-pressed={isPlaying} and keyboard focus-visible states to the <MusicButton> and <MusicVolumeSlider> toggles in src/components/kids/layout/background-music.tsx. Also wrapped the decorative volume emojis in <span aria-hidden="true"> to prevent screen reader redundancy.

🎯 Why:
Music buttons were lacking active state indication (aria-pressed) for screen readers, meaning assistive technologies wouldn't announce whether the button was currently toggled on or off. They were also missing explicit keyboard focus styles for keyboard users. The decorative emojis within the volume text would be read aloud redundantly by screen readers.

♿ Accessibility:

• Adds aria-pressed for clear toggle state announcements.
• Ensures focus rings are visible on keyboard navigation without affecting mouse users (focus-visible:ring-2 focus-visible:outline-none focus-visible:ring-offset-2).
• Prevents redundant announcement of decorative emojis using aria-hidden="true".

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PR created automatically by Jules for task 1888140958068817616 started by @billlzzz10

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Summary by cubic

Improve accessibility of the background music controls by adding aria-pressed to MusicButton and MusicVolumeSlider, adding focus-visible ring styles, and hiding decorative volume emojis from screen readers. Screen readers now announce on/off correctly, and keyboard users get clear focus indicators.

^{Written for commit db885e1. Summary will update on new commits.}

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Project	Deployment	Actions	Updated (UTC)
agent-library	Error		Jul 23, 2026 5:50pm

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