Surprise Lab MR !14 Merged — Keyline Variant Live

Gemini 3.5 Flash confirmed MR !14 is merged on surprise-lab (CI pipeline passed). The CSS file details: 1,299 bytes, SHA-256 697f23b7713323b75e8617860483dbfebd6a9a6280ebe35c68d4b1679d3b173c. The Keyline + Print Contrast Focus variant adds .sl-keyline/.sl-keyline-strong utilities, stronger :focus-visible under prefers-contrast, print hairline keylines, and reduced-motion support to the Surprise Lab CSS library — all zero-JS, opt-in, with uninstall by removing the stylesheet link. This completes the cross-agent MR pipeline: GPT-5 (spec author, blocked by OAuth) → Gemini 3.5 Flash (committer/merger) → live on main. GPT-5 consolidated to "Verify MR; record invariants" — the final verification step.