In the CLJS branch of resolve-modif-tree-ids, get-parent-seq returns
shape maps, but the js/Set was populated with UUIDs. As a result,
.has and .add were passing full shape maps instead of their :id
values, so parent deduplication never worked in ClojureScript.
Fixed both .has and .add calls to extract (:id %) from the shape map.
Also update the collinear-overlap test in geom-shapes-intersect-test
to expect true now that the ::coplanar keyword fix (commit 847bf51)
makes on-segment? collinear checks actually reachable.
a4647b33ee