fix: preserve scroll position on navbar back button

[noobpiyush]

Fix: Back Button Scroll Position Reset

Problem

Clicking the back button in the navbar currently causes the page to scroll back to the top, losing the user's previous scroll position. This disrupts the user experience when navigating back from content pages.

Solution

Modified the Navbar component to include scroll position management. The implementation preserves the exact scroll location when users click the back button, matching expected browser behavior and improving navigation UX.

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Scroll Management Implementation

• Added scroll position tracking
• Implemented position restoration
• Added browser navigation handling

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Testing Done

• Back button preserves scroll position
• Works on both short and long pages
• Tested on mobile devices
• Verified with different navigation patterns

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Steps to Test

1. Checkout the testing branch.
2. Navigate to any long content page.
3. Scroll down partially.
4. Click the back button in the navbar.
5. Verify that the scroll position is maintained.

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Notes

• No new dependencies added.
• No breaking changes introduced.
• Existing functionality remains unaffected.
• Changes only impact scroll behavior on back navigation.

[devsargam]

i feel this is just a bit of over engineering rather than having a good dx. closing this pr now but feel free to contribute on anything else.