UI redesign: consistent design system, card layout, unified colors and typography

Load preset image into patch explorer (not just GT brain)

Add remove button to example presets in editable mode

Add Save as Preset button (--editable-examples flag); wire examples file in entrypoint

Show NSD image ID in patch figure title; add image field to example presets

Refactor: split panels into pure logic + UI layers

Full sync of explorer/ with local: args, inference, widgets, patch, examples