🎨 Palette: Game Detail Header Accessibility & UX Polish

[Gamepulse]

💡 What: The UX enhancement added

This PR improves the accessibility and micro-interactions of the GameDetailHeader component. Key changes include:

• A new Clear Rating button that allows users to reset their personal rating to null (previously impossible with the range slider).
• ARIA & Keyboard accessibility improvements: added labels, pressed states, and high-contrast focus rings to all interactive elements.
• Semantic HTML: converted the folder path click-target from a <p> tag to a proper <button>.
• Internationalization: added new translation keys for the "Clear Rating" action.
• Build stability: fixed a TypeScript error in GameScreenshotsCarousel caused by an unused state variable.

🎯 Why: The user problem it solves

• Users couldn't unset a personal rating once it was set.
• Keyboard-only and screen reader users had no way to interact with the folder path or know the state of the favorite toggle.
• Interactive elements lacked visual focus indicators, making navigation difficult without a mouse.

♿ Accessibility: Any a11y improvements made

• Added aria-label and aria-pressed to icon-only buttons.
• Used htmlFor to link labels with form controls.
• Marked decorative emojis and overlays with aria-hidden="true".
• Implemented focus-visible rings for all interactive headers.
• Used semantic <button> for all actions.

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PR created automatically by Jules for task 11149987766972798003 started by @Gamepulse

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