🎨 Palette: Improve GameDetail accessibility and rating UX

[Gamepulse]

This PR introduces a micro-UX improvement to the game detail page and enhances accessibility across the header.

💡 What:

• Added a "Remove" button next to the personal rating slider. Since native range inputs cannot represent a null/unset state, this provides a clear way for users to remove their rating.
• Replaced the folder path display with a semantic button that is keyboard-accessible and has a descriptive ARIA label.
• Added ARIA labels and focus indicators to genre, mode, theme, and perspective filter buttons.
• Marked decorative branding overlays as aria-hidden.
• Fixed a TypeScript build error caused by an unused variable in the screenshots carousel.

🎯 Why:

• Improving the personal rating UX by allowing it to be cleared.
• Ensuring the interface is more accessible for screen reader and keyboard users.
• Maintaining a clean build by removing unused code.

♿ Accessibility:

• Semantic buttons used for all interactive elements.
• Clear focus-visible rings added for keyboard navigation.
• Icon-only buttons (favorite, remove rating) have descriptive ARIA labels.
• Decorative elements hidden from screen readers.
• Avoided nested interactivity in cards to comply with ARIA standards.

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PR created automatically by Jules for task 9790224091897100206 started by @Gamepulse

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