fix(ui): funky drop targets

[psychedelicious]

Summary

• Fix funky drop targets
• Bigger drop target for node images, and it has error state (i.e. when image is required and no image is selected)
• Add error state for IP adapter image drop target (i.e. when no image selected)

Related Issues / Discussions

https://discord.com/channels/1020123559063990373/1149506274971631688/1291765977448448131

QA Instructions

Try out drop targets

Merge Plan

n/a

Checklist

• The PR has a short but descriptive title, suitable for a changelog
• Tests added / updated (if applicable)
• Documentation added / updated (if applicable)