Create a sub-gallery inside another sub-gallery (i.e., support for sub-sub-galleries).

I run a real estate media company, and our projects often require multiple levels of folder hierarchy. Typically, we have a main gallery, then several sub-galleries, and inside each sub-gallery we upload the media.

However, sometimes we need to further subdivide these media into additional folders — essentially a second layer of sub-galleries.

Right now, PicFlow only supports one layer of folders. When I drag and drop a folder structure from my computer, PicFlow flattens everything into a single level instead of preserving the hierarchy. This forces me to manually recreate the entire folder structure inside PicFlow, which is extremely time-consuming.

I would like the ability to automatically create and manage a deeper folder hierarchy (sub-sub-galleries) when importing from my computer, so the structure is preserved and we can stay organized efficiently.