Feature/UUID generator

[Shaily-62]

Issue:

#172 — Quick UUID Generator

Summary

This PR enhances the Quick UUID Generator by introducing a Light/Dark theme toggle with smooth transitions and persistent user preference.

Describe your changes clearly.

• Added light and dark themes with consistent visual design
• Introduced a theme toggle button (🌙 / ☀️) fixed at the top-right corner
• Stored theme preference using localStorage for persistence across sessions
• Refined light theme styling with soft gradients, improved contrast, and subtle shadows
• Maintained accessibility and responsiveness for both themes
• Preserved all existing functionality (UUID generation and copy-to-clipboard)

demo

Quick.UUID.Generator.and.1.more.page.-.Personal.-.Microsoft_.Edge.2025-10-29.11-57-27.mp4

[vercel]

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