529e74c1a6
Add the real LDraw LEGO parts (LeoCAD-style) as the posable objects.
- Vendor the curated 15-part LDraw closure under public/ldraw so it is
served at /blocs-pro/ldraw/ after build (CC BY 4.0, credits kept).
- src/utils/ldraw.js loads each part via three's LDrawLoader, caches the
geometry per type, applies the LDU->world scale and Y flip to match the
existing grid, and tints surfaces with the active colour.
- A LeoCAD-style PartsBar (colour row + category tabs + part grid) picks
the active part; Create mode places it at the grid cell and stores a
JSON-only brick { uID, type, color, position/dimensions, rotation } so
the piece syncs to peers like any other brick.
- Brick.jsx renders the cached LDraw clone for typed bricks and keeps the
parametric box as a fallback. Edit-mode tooling (select / move / colour
/ delete) walks up to the brick group so it works on multi-mesh pieces;
selection is shown with an emissive tint instead of the stud wireframe.