BUG : [Bug/Feature] Nav Bar Layout Shift & Pull-to-Refresh

### Is there an existing issue for this?

- [x] I have searched the existing issues

### What happened?

***Description***
The Top Nav Bar (search/profile area) shifts unexpectedly during reloads or when the gallery is empty. Additionally, there is no gesture to manually refresh the image feed.

***Issues***
- Nav Bar Shift: The top navigation bar layout is unstable and "jumps" during state changes or data fetching.
- Missing Refresh: Lack of Pull-to-Refresh functionality when at the top of the gallery or when no images are returned.

***Video***

Video Link : https://drive.google.com/file/d/1G-rBSTPh_IENho1k_UMkKAzYV2zPZXhH/view?usp=sharing

***Proposed Fix***
- Lock the Nav Bar height and layout using fixed CSS constraints to prevent shifting.
- Add a Pull-to-Refresh gesture to trigger a gallery re-sync.

hi @rahulharpal1603
I would like to work on this. Please assign this issue to me.

### Record

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