These files (build/lib/footnote-analyze.js, build/lib/footnote-lex.js from the
merged footnote work, and the y-prosemirror node_modules symlink) survived the
rebase because this branch's earlier "stop committing build/ and node_modules"
commit predated them. They are gitignored (packages/mcp/build/) and generated /
symlinked, so untrack them to keep the branch consistent with that decision.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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