v1.7.0: Roll-off and head-to-head views

The "who wins?" release.

Added

• Roll-off view: if every roll rolled once, each roll's exact chance of producing the single highest result — win bars scaled against the favorite, a headline sentence, per-roll tie notes, and a Win chance / Table order sort toggle. Ties are counted separately; nobody wins those outright.
• Head-to-head view: a matrix of one-on-one odds where each cell is how often the row roll strictly beats the column roll, ignoring every other row, with the tie chance on every cell. Scrolls sideways inside its own container on mobile.
• Both views compute exactly from the distributions already on hand (a new pure compare engine module, no simulation) and include Pool rolls on their success-count scale, with a caption explaining why cross-scale match-ups are usually lopsided.
• Comparison docs: glossary entries (Roll-off, Head-to-head, Tie), a "The Math" section on exact win and tie chances, a new Quickstart step introducing the four workshop views, and an updated public/llms.txt.

Full notes in the CHANGELOG.