Populate clues[] for every Continuum scenario (afterimage, day-one,
vain-crown, silvery-moon, chopper, princes-bride), transcribed faithfully
from the gm-utility console sources (CLUES arrays, gbclue GM-brief spines,
and the princes-bride module). The Slice 4 clue safety-net now works
against real content — essential-gap banner, act labels, and fallbacks.
day-one and princes-bride carry the source's own essential/optional split;
the four GM-brief spines mark each tracked clue essential (single curated
list, no optional tier in-source).
tests/scenarios/clues.test.js guards shape, unique ids, and solvability.
129 tests pass; build clean.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
