review-polish

The before-review and before-handoff pass for RomM, covering both stacks. First shapes the code the checks can't see — comment and docstring discipline (the single most-corrected thing in this repo), duplicated constants/types/getters, imprecise names, loose typing in tests. Then runs the verification gate that keeps CI green — frontend (typecheck/lint/test/build/i18n/tokens), backend (pytest/alembic/trunk), the…