connect() now RECORDS a Connection (anchor feature, moving feature) instead of
just moving a board, so connected parts form an assembly:
- scene.groups(): connected-component part groups via the connection graph.
- explode(distance): back each moving board off along its joint axis (exploded
view); assemble(): re-seat all (reverse); disconnect(cid/part): break a
connection — pieces stay in place but become independent.
- _seat() extracted from connect() so re-fit re-runs the mate math.
- delete() drops connections referencing the removed part; clear() resets them;
connections persist in scene.json.
Parts stay SEPARATE boards (not fused) so the cut list and disassembly keep
working — the assembly is a group, not a merge.
CLI: connections / disconnect / explode / assemble; voice: wood-connect/explode/
assemble/disconnect (25 tools). Fit dialog shows part names. 83 tests pass
(records+groups, explode/assemble roundtrip, disconnect keeps position).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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