fix: enable sign in button when firefox autofills credentials

[fyzanshaik]

PR Fixes:

• Fixed an issue where the submit button wasn't disabling on Firefox when autofill was used.
• Optimized the autofill detection logic by moving it to a dedicated useEffect for better performance and readability.

Resolves #[1650]

Screencast.From.2024-12-12.17-53-32.mp4

Checklist Before Requesting a Review:

• I have performed a thorough self-review of my code to ensure quality and adherence to best practices.
• I confirm that no similar or duplicate pull requests exist for the same issue or functionality.

[fyzanshaik]

ping @devsargam @hkirat