Oracle: Gaps 1-3 canvas (destructive boards, bottom-right amendment); mock shell.jsx Toast
Glass surface, status icon chip, title + meta, close X. Toasts run at 0.6× overlay duration with spring easing — they arrive (§8).
Soft-delete surfaces restore immediately: “Deleted. Undo.”
Max 3 glass surfaces composited at once (§5.3) — while a dialog scrim shows, toasts render opaque surface-raised.
Fixed above the floating dock so a toast can never overlap it (§7, Session-2 amendment). Offset concretized at 96px = the dock clearance used by form footers (G2-5); §7 left it “TBD in build” — flagged for veto in the README. Static stage below (the dock itself is shell chrome, M3).