[FEAT]: Make Texture Lab Canvas empty state clickable for media upload

[naama-git]

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First of all, this project is amazign, I love it!

I noticed a small UX improvement opportunity in the Texture Lab preview canvas. Drag-and-drop works perfectly, but clicking the empty canvas area currently does nothing.

It could be more intuitive if clicking the empty state (“Upload an image/video to get started”) also opened the file picker dialog, similar to the Upload button in the sidebar.

I'd be happy to open a PR for this if it sounds useful.

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• I have checked other issues to see if my issue was already discussed or addressed

[DavidHDev]

Sounds like a good improvement, feel free to open a PR