D8.12-B BimCraft: print as shown — pen overrides saved in the file and on sheets and PDF

Pen overrides (SU.1055, pens.js) live in the browser only (localStorage bimcraft.pens), cover walls, doors and windows, and are not on the printed plan yet. Do: keep them in the IFC with the view, cover every category (and drafting), and draw sheets and the PDF exactly as the screen shows (default). The other working style prints through a pen table (colour → weight and ink), reusing CadCraft's plot-style work (DC.14) rather than a second format. Closes SU.1055's pen-override rest. Part of D8.12.

**Implementation started 2026-11-02** (0.9 top-5 pick #2, hardest first; session `bim-views-09`, log docs/0.9-sessions/bim-views-09.md). Status moves to Partly built or Built only when the code is reachable and tested (rule 49).