Fix/signup name input UI

[srujana-manda]

📌 Description

Fixed UI inconsistency in the Sign Up page where the "Full Name" input field was missing proper structural styling (background, border, and focus state). Now all input fields (Name, Email, Password, Confirm Password) follow a consistent design system.

🔗 Related Issue

Closes #1149

🛠 Changes Made

• Ensured consistent input-modern styling for all Sign Up input fields
• Fixed missing background/border visibility issue in Name field
• Improved UI consistency across form inputs
• Verified focus and hover states for better UX

📸 Screenshots (if applicable)

BEFORE

AFTER

✅ Checklist

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

🚀 Notes for Reviewers

Please verify that all input fields have consistent styling and that the Sign Up form matches the existing UI design system.