Integration: forgot password wiring

[Prajeeth-12]

This pull request adds backend integration and improves user feedback for the forgot password page. The main changes include creating a reusable API helper, connecting the forgot password form to the backend, and enhancing the UI to handle loading and error states.

API integration and error handling:

• Added a generic apiPost helper in frontend/src/lib/api.js for making POST requests and handling errors and JSON parsing.
• Connected the forgot password form to the backend by calling apiPost('/api/v1/auth/forgot-password', { phoneOrEmail }) on submit, and handling API errors with user-friendly messages.

UI/UX improvements:

• Displayed error messages to users when the forgot password request fails, using a styled error box.
• Disabled the input field and submit button during API requests, and showed a loading state on the button.

[Munazzah-Rakhangi]

Tested locally — backend POST /api/v1/auth/forgot-password works correctly (returns 200 via curl), but the frontend call still fails with 404.

Please:

• Verify the endpoint path (/api/v1/auth/forgot-password) matches the backend.
• Check VITE_API_URL in .env and ensure the request URL is built properly.
• Confirm payload { "phoneOrEmail": "..." } and method POST.
• Display a clear success message on 200 and a user-friendly error on failure.
• Connect the email flow so the actual password reset link is sent to the user’s inbox.
• Re-test after fixing and then re-request review.