fix(login): remove client-side authToken cookie handling and rely on secure server cookie

[KGFCH2]

What changed

• Removed insecure client-side auth token cookie set
• Shifted login flow to rely on secure server cookie authentication

Why

Reduces attack surface and aligns with secure auth best practices.

Testing

• Perform login flow
• Confirm authentication succeeds
• Verify no client-side token cookie is written

Checklist

• Client-side auth cookie handling removed
• Login still works
• Security improved

Closes #35

[vercel]

@KGFCH2 is attempting to deploy a commit to the Harsh Yadav's projects Team on Vercel.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 18595ec4-0518-4c12-a9f1-a47f4d6c30e8

📥 Commits

Reviewing files that changed from the base of the PR and between dcfb7ee and 72602d0.

📒 Files selected for processing (1)

• gsecure/app/(auth)/login/page.js

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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