🎨 Palette: Semantic HTML and Language Switcher Accessibility Improvements

[Twinber]

💡 What:

• Converted non-interactive <span> elements into fully accessible <button> tags within the Language Switcher. Added aria-label and focus-visible states.
• Utilized Radix UI's <Button asChild> functionality to properly wrap semantic <Link> and native <a> tags in NetworkItem and GmapsButton respectively, preventing nested invalid HTML while preserving visual Shadcn styling.
• Resolved a critical pnpm build failure related to template string paths in <Link>.
• Added rel="noopener noreferrer" to external window opening links for safety.
• Resolved a Number object typing eslint error.

🎯 Why:
Interactive elements like Language Switchers must be semantic tab targets for screen readers to work correctly, and keyboard users need visual focus indicators. Additionally, standard React/Tanstack links should not be wrapped as raw children inside visual <button> styling tags as it creates invalid, non-semantic HTML trees that break browser accessibility mapping.

♿ Accessibility:

• Added robust keyboard focus states using Tailwind's focus-visible:outline utilities.
• Added descriptive aria-labels specifying intent ("Switch language to English").
• Removed invalid nested generic HTML wrappers from interactive routing components.

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PR created automatically by Jules for task 13566532703678938573 started by @Twinber

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