Mythic Masters: the Book speaks on every page, hill climb to 10/10, rounds 3+ (from #3468) #3472

Carries on from #3468 (rounds 2+), which carried on from #3266 and #3278. There is no wizard: the Eldritch Compendium is a possessed book that demands we collect the earth's cryptids, like a mob boss keeping accounts. The aliens that dropped us here fled from the forces around it, not from the book itself. More lore comes later, from the owner.

Goalpost: the Book speaks on every page

The score is how many of the ten menu surfaces carry the Book's hand (a demand or a margin line in Covered By Your Grace, signed "the Book" where it makes a demand) and its rust thumbprint. Each one has to say something true for that page, not just repeat the same line.

Score: 5/10 (target 10)

What is in the code

• apps/mythic-masters/src/demand.ts: demandOf(journey) (the ledger), reactionOf(outcome, journey) (the result note's line, signed when it is a demand) and thumbAt(n).
• src/main.ts: hand(ask, signed) draws the Book's hand; reaction(outcome) puts it under a result note's heading.
• src/page.ts: thumb() presses one thumbprint on each page book().show() opens.
• docs/MARGIN-NOTES.md: the voice guide, rewritten for the Book (demands signed, margin notes not), with a table of every line in use. Add yours there.

Next, one PR per round

1. The starters sheet and the bestiary deck get a demand or margin line.
2. The world's toasts in the Book's hand when you bind something or clear a section.
3. Settings: one dry margin line, plus a thumbprint on the card.
4. The versus spread: sign the summon lines that are demands.

Owner's call (ask, don't guess)

• Mythic Masters: the menu is a wizard's tome (and the book is secretly his contacts list) #3266's late-game secret (the book is a wizard's contacts list) came before "there is no wizard". Does it stay, change into something else, or go? The voice guide now marks the phone-book double reading as on hold.
• Depth mechanics for the demands (the owner said they will add them over time). One option from Mythic Masters: the wizard himself (handwriting, name, one recurring stain) #3278 was 1C: the hand gets more scrawled the longer a demand goes unmet.