Akiba So
4c8cc73106
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Board + BoardCard: positioned sticky-note cards in board coordinates, immutable copy-on-write edits (add/removeById/moveCard/setText, unique ids), cardsIn() broad-phase culling, and linkGraph()/backlinksOf() that derive the 双链 graph from the cards' [[links]] — making link_graph load-bearing. Cards also host ink via a StrokeHost keyed by card id (same host-agnostic engine as PDF pages). Pure model; fully unit-tested (CRUD, immutability, culling, backlinks). flutter analyze lib/editor clean; 215/215 tests (+7). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>