Edit path is now pure Python: an English keyword parser maps the instruction to
a catalog part plus count/scale/anchor/rotation/color, and the assembler snaps it
on deterministically (symmetric pairs first, overflow to rear; float scale rounded
to the grid; exact 90deg integer-grid rotation). Instant, no GPU. Gemma 12B stays
only for full generation, hatch fusion, and the freeform-edit safety valve.
Removes select_part, the MiniCPM selector constants/preflight/warmup bench, and
SELECT_SCHEMA/build_select_messages.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
