🎨 Palette: localize global accessibility UI and add tactile feedback

[kuasar-mknd]

💡 What: Localized hardcoded French accessibility strings (skip links, back to top button) in the main layout and added subtle haptic feedback.

🎯 Why: The CV page supports both English and French, but the global accessibility elements remained in French even on the English version. Additionally, providing tactile feedback on skip links adds a touch of delight for users navigating via keyboard shortcuts.

📸 Before/After: Skip links now correctly display "Skip to main content" on /cv/en and "Aller au contenu principal" on /cv. The "Back to top" button also respects the page language.

♿ Accessibility: Fixed a gap where skip links were not included in the Lightbox's focus trap by adding the .skip-link class. Localized all global ARIA labels and visual cues.

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PR created automatically by Jules for task 8288332302026235839 started by @kuasar-mknd

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