🎨 Palette: Improve accessibility and UX for button links

[Twinber]

🎨 Palette: Improve Accessibility and UX for Button Links

💡 What

This PR addresses several micro-UX and accessibility improvements for interactive link elements styled as buttons:

1. Refactored NetworkItem.tsx and GmapsButton.tsx to correctly use the <Button asChild> pattern.
2. Added a helpful MapPin icon from lucide-react (with aria-hidden="true") to the Google Maps button to visually enforce its purpose.
3. Updated external links to include rel="noopener noreferrer".
4. Modernized TanStack Router links to use type-safe route parameters.

🎯 Why

Previously, the codebase was wrapping semantic link elements (<Link> and <a>) inappropriately, either embedding them directly inside <button> elements or completely omitting semantic linking by applying button classes to arbitrary elements. Nesting a button within an anchor tag is invalid HTML and causes screen-reader issues and degraded keyboard navigation support. Using Shadcn/Radix's asChild pattern gracefully solves this by applying the correct Button design system styles directly onto the semantic <Link> or <a> tag.

📸 Before/After

(Visuals successfully verified with Playwright during implementation)

• Before: Text-only buttons that rendered as invalid semantic nested HTML.
• After: Correctly semantic anchor tags that look like buttons, with the added context of a MapPin icon for external maps!

♿ Accessibility

• Fixed invalid HTML structure (nested interactive elements).
• Preserved native focus states and keyboard navigation for link destinations.
• Ensured decorative icons are explicitly ignored by assistive technology (aria-hidden="true").

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PR created automatically by Jules for task 5121534829624105929 started by @Twinber

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