Vendor extensions

cmap-racket-wiki.js is the racket-wiki interaction layer for upstream ionstage/cmap 0.1.3. The upstream library is installed as /vendor/cmap.js by the normal frontend setup. Racket-wiki adjusts its Node.prototype.style so rendered concept nodes accept pointer events; upstream's link hit testing is left unchanged.

The extension remains separate because selection handles, resize controls, drag-to-connect relations, separate linking-phrase nodes and wiki page/submap behaviour belong to the racket-wiki editor rather than the generic drawing library.