feat: design and implement email verification page in auth flow (closes #82)

[singhanurag0317-bit]

Description

This pull request resolves Issue #82 ("frontend:design the signup, login and email verification page") by designing and implementing a high-fidelity, fully responsive, glassmorphic Email Verification Page component, integrating it seamlessly into the frontend user registration/auth routing flow, and completing the user signup steps structure.

Key Improvements

1. Futuristic Glassmorphic Email Verification Page (EmailVerificationPage):

   • Created frontend/src/features/auth/EmailVerificationPage.tsx.
   • Designed a beautiful security card containing 6 individual verification digit input boxes.
   • Features automatic focus shifting to the next box upon entry, automatic backspace deletion, and support for pasting 6-digit codes.
   • Implements a simulated 60-second resend countdown timer.
   • Includes a visual helper badge for developer/recruiters simulation, stating that code 123456 can be entered to pass the verification instantly.

2. Decoupled User Auth Routing Integration:

   • Modified frontend/src/App.tsx to declare "email-verification" as a viewable page route.
   • Updated the signup success handler so successful signup seamlessly transitions to the verification step instead of bypassing it.
   • Added appropriate back button mapping to go back to the signup form if needed.

3. Step Indicator Alignment:

   • Modified frontend/src/features/user/ProfileSetupPage.tsx to set the step indicator to Step 3 of 3 (matching the new verification flow).
   • This completes the designed 3-step registration:
     • Step 1: Create your account (Signup)
     • Step 2: Verify your email (Verification)
     • Step 3: Set up your profile (Profile Setup)

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Verification

• Verified that all modified and new files compile perfectly.
• Ran npx tsc --noEmit locally in the frontend workspace, which completed with absolutely zero errors or warnings.