Optimize Auth Flow by Removing Redundant /auth/me Requests

[Ashutosh-Mall]

📌 Description

Optimized the authentication flow by returning user data directly from the backend during signup and login. This removes the need for extra /auth/me requests after authentication and improves overall performance.

🔗 Related Issue

Closes #405

🛠 Changes Made

• Added user object in signup API response
• Added user object in login API response
• Removed password field using .select("-password")
• Removed unnecessary /auth/me API calls from frontend
• Updated auth state handling in Login.jsx and Signup.jsx

📸 Screenshots (if applicable)

N/A

✅ Checklist

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

🚀 Notes for Reviewers

This PR mainly focuses on reducing redundant API requests and improving authentication response handling.

[Ashutosh-Mall]

Hi @aryandas2911
Looks good overall 👍
No major issues found. Ready to merge