Design visual parity

Makes one rule true: every built screen is compared with its approved design reference on every device, theme and language of the app, and fixed until it matches. Machines check geometry, text, colour, borders, type and shape per element; the agent checks the rest by looking at side-by-side sheets; check-signoff.mjs proves both happened for the current build and writes the summary a report's "Design match" line names.

Rules that must hold