FX.79 ModelCraft Surfaces solids test opens the folded Surfaces section first

tools/modelcraft-test/browser-solids.mjs failed before any change of 2026-11-06: the right panel now folds its sections (app-settings.js, one open at a time), so the Surfaces button was not visible. The test now clicks the Surfaces heading when the section is folded (as a person does), and expects 9 Solids commands (+ Fillet between faces, Thicken into a solid, SU.747c); PartCraft's browser-solids.mjs the same count. Both pass (14/0, 18/0). Not fixed here: ModelCraft's browser-trim.mjs, browser-scanfit.mjs and tools/nurbs/browser-scanfit-09.mjs open the panel the same old way (listed in docs/0.9-sessions/nurbs-s3-09.md § Found).