lightbox: Add "download" button in bottom app bar

[chrisbobbe]

The bottom app bar currently has just one button, to copy a link to the image. It should also have a button to download the image, in the way that feels most familiar for the platform.

I didn't include this in the prototype because I think it'll involve a network request, like the one we do in the RN app's api.tryGetFileTemporaryUrl. As usual for network requests, that means we should consider what to do when the request succeeds, fails, or goes on forever without succeeding or failing.

[chimnayajith]

I'd like to work on this. Can i be assigned to this?

[lakshya1goel]

Hi, I have implemented the download functionality for the image using a download button in the bottom bar. Just having a blocker in requesting the external storage permission for downloading the images. The app is not requesting for the storage permission. Need some help regarding the same.

[chrisbobbe]

This issue is marked post-launch, so the core team is unlikely to be able to help much in the short term.

[lakshya1goel]

Hi, I have implemented this completely. Adding the video for the same for your reference. Please have a look at it and please assign this issue to me. https://github.com/user-attachments/assets/7b03720b-07ea-46f4-af89-51f6ccf360c7