fix(ui): resolve scroll button overlap and clean footer layout

[SHIKHARCHATURVEDI19]

📌 Description

Resolved the responsive UI bug where the floating Scroll-To-Top arrow button was overlapping and blocking the "Built with ❤️ for GSSoC 2026" footer contribution text on smaller/medium display dimensions.

🔗 Related Issue

Closes #1476

🛠 Changes Made

• Added a secure right-padding (pr-16 md:pr-24) to the footer's bottom-bar text element container.
• Eliminated the redundant blocky rectangular background wrapper from the GSSoC badge for a flat, modern visual output.
• Ensured absolute responsive alignment between the copyright layout and the contribution string across fluid screen break-points.

📸 Screenshots (if applicable)

✅ Checklist

• Code runs locally
• Followed project structure
• No console errors
• Properly tested changes
• Linked the issue

🚀 Notes for Reviewers

The change strictly targets the layout padding wrapper of the bottom bar without breaking any existing tailwind core color palettes or design guidelines specified in the root architecture.