Copy keeps the copied objects with every document resource they use
(Session.clipboard: Clipboard {nodes, images, symbols, patterns,
swatches, graphic_styles, char_styles, para_styles, brushes,
source_artboard, source_layers, source_doc}), following symbols,
patterns, graphic styles and text styles into what they use. Every
edit.paste* brings them in within its undo step: identical resources are
reused, missing ones added, different ones of the same name added
renamed (an earlier paste's copy is reused) and the pasted objects
relinked, graphic style links by id. Global and spot swatches that
conflict ask Merge or Add (swatchConflict; clipboard.conflicts lists
them; the app's Swatch Conflict dialog asks one by one, with Apply to
All). Tint swatches, linked gradient stops, Lab spots and the target's
Spot Colors option are honoured; [Registration] is never copied.
Clipboard SVG exports them too.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>