Add smooth scrolling for navbar section links #80

Task Description

Currently, clicking navbar links jumps instantly to sections.
This issue proposes adding smooth scrolling to improve user experience.

Goals

Add smooth scrolling behavior when navigating between sections using navbar links to improve overall user experience.

Acceptance Criteria

• Clicking a navbar link smoothly scrolls to the target section
• No layout or functionality regressions are introduced
• Works consistently across modern browsers

Component

Frontend

Technical Details

Use CSS scroll-behavior: smooth or an equivalent JavaScript-based approach.
Avoid introducing new dependencies.

Resources

No response