Mythic Masters tome: a deeper edge curl, a contact shadow, glossy wet ink and a pooled nib (#3717 what is left) #3748

What a fresh judge left after #3717's PR (turn 4 -> 5, ink 2 -> 5 on its own scale; halved gains +0.5 and +1.5). Shots: apps/mythic-masters/docs/shots-2026-11-04-tome/gap3-r2-*.jpg; recipe in #3717.

1. The turn: the free edge's arc and the foot's curl are too slight to read mid-swing (BOW, BOW_EDGE and arcClip in src/page.ts). The shadow reads as a general dimming; it wants a tighter contact band right at the edge (castShadow, .turn-shade i in src/tome.css).
2. The ink: the wet stretch reads plain black, not glossy (.ink.pen > .wet backdrop filter); the nib blot is faint (.wet > .nib), it wants a visible pooled drop.

Also not seen with my own eyes: the owner's "when I close the tome I see the reverse of the last page" did not reproduce in headless Chrome. The fix (a sheet is not drawn while it faces away, swingFrames) assumes WebKit; check it in the desktop app.

Part of #3671.