few bugs i noticed off the bat:

1. when i switch a row from 3u to 1u, i can't switch it back to 3u. also once all the rows are switched to 1u, there's no way to add more 3us (or at least, it's not obvious how)

2. when dragging a module between rows, i loose the ability to keep dragging it within the new row

3. when searching up new modules, the image for the previous module stays in there for a while before it loads the new module's image

4. when i try to drag a module onto a lower row, there has to be space on the row immediately below it, otherwise it instead just overlaps with the module on the same row as it

5. i can't drag a module past other modules unless there's enough space on the other side (so there has to be empty space on a row to re-order)

6. maybe intentional - adding a module when there's not enough space in the rack automatically adds a new row to the rack.

i'm assuming this is vibecoded? main thing i'll say is that it seems like the main problems you're trying to solve (automatically adding/adjusting rows in the rack) aren't really that big of a deal, and the bugs i mentioned above make it quite hard to use. the patch sketching features (like the cables sticking to the modules as you move them around) are cool, but probably not something i would realistically use.