style(frontend): optimize Button, Sidebar, and wallet modal interactions

[Akanimoh12]

Summary

This PR delivers frontend touch-ups across Button, Sidebar, and Wallet Connection modal interactions to improve perceived performance and hover UX while preserving the existing Drips Wave (Pluto) visual language.

What Changed

• Optimized Button rendering path:
  • Hoisted static class maps out of render.
  • Replaced broad transition-all with narrower color transitions.
  • Wrapped component in React.memo while preserving forwardRef API.
• Optimized Sidebar rendering and interaction styles:
  • Memoized nav item generation in NavLinks.
  • Memoized NavLinks component and stabilized navigation callback.
  • Updated hover states to be more consistent with Pluto theme tokens.
  • Replaced transition-all with targeted transition classes.
• Updated Wallet Connection Modal (WalletSelector) hover states:
  • Hoisted static icon/subtitle maps out of render.
  • Improved wallet option hover/focus styles for clearer affordance.
  • Replaced transition-all with targeted transitions and reduced animation cost.

Security and Stability

• No new external input surfaces introduced.
• No auth/payment logic changed.
• Changes are presentation-layer only and keep existing behavior intact.

Verification

• npm run lint (frontend) ✅
• npm run build (frontend) ✅
  • Build completes successfully; existing upstream warnings from third-party dependency resolution remain unchanged.

Documentation

• Changes are self-contained in component styling and structure with clear class/token usage aligned to existing theme conventions.

Closes #528
Closes #537
Closes #544
Closes #534

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@Akanimoh12 Great news! 🎉 Based on an automated assessment of this PR, the linked Wave issue(s) no longer count against your application limits.

You can now already apply to more issues while waiting for a review of this PR. Keep up the great work! 🚀

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