Credibility pass: the seams get sanded

Scoped to everything since the last pass (3308850). Three blind
reviews, every finding verified before touching anything.

Confirmed and fixed: two identical comment-splitting insertions left
doc comments orphaned from their fields (net and local alike); a
51-line CSS fossil of the pre-extraction inline effects survived in
Board.svelte; the rev-13 miss-roll test asserted tautologies while
its comment claimed a check the code never made — it now proves the
die was consumed, and the skeleton is no longer returned as trollId;
the sprite registry's `as never` silently disabled the completeness
its annotation advertised (now a mapped type, one cast at the
dispatch seam); a dead ternary guarded a union that doesn't exist;
Bolt carried a duplicate .fork rule from a color iteration; fxTtl
contradicted three sprites' real animation lengths; the permanence
sentinel was reinvented as a magic 9000 (the engine now exports
isPermanentDuration); CELL was declared thrice (fx.ts now imports
it); App and Replay ran two divergent fx schedulers (one scheduleFx
now, cancellable — stale flourishes can no longer fire after leaving
a game); TokenArt retried missing files forever; the anti-anti
escape guards merge with the gate asymmetry explained; wall-of-fire's
rev-12 carve-out is marked; overLimit ignored a displayed BRAINSTONE
(bots over-discarded by two); botRemark's header mis-stated its own
branches; deliverGold fired on any drop, not a home-base delivery;
escape and win banter never fired from the steps that carry them.

Rejected: "as a human would" (house voice); FxGallery's dev-harness
framing (trimmed one plea, kept the facts).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

packages/engine/test/creatures.test.ts

@@ -466,28 +466,23 @@ describe("monsters roll to hit the hidden (rules rev 13)", () => {
       id: "fx1", cardId: "invisible", casterId: victim.id, targetId: victim.id,
       remainingTurns: 3, data: {},
     });
-    return { state, me, victim, trollId: bones.id };
+    return { state, me, victim, skeletonId: bones.id };
   }
 
   it("rev 13: the skeleton's blow takes the 1-in-4 roll — 'any attack' means any", () => {
-    // Deterministic seed: this particular swing misses and the blow dissipates.
-    let { state, me, victim, trollId } = creatureVsInvisible(13);
-    const lifeBefore = state.players.find((p) => p.id === victim.id)!.life;
-    state = must(state, me, { type: "creatureAttack", creatureId: trollId, targetId: victim.id });
+    let { state, me, victim, skeletonId } = creatureVsInvisible(13);
+    const rngBefore = JSON.stringify(state.rng);
+    state = must(state, me, { type: "creatureAttack", creatureId: skeletonId, targetId: victim.id });
     state = must(state, victim.id, { type: "pass" });
-    const rolled = state.rng;
-    expect(rolled).toBeDefined();
-    const after = state.players.find((p) => p.id === victim.id)!;
-    const missed = after.life === lifeBefore;
-    // Whichever way seed 42's die lands, the roll HAPPENED: a die event is in the chronicle.
-    expect(missed || after.life < lifeBefore).toBe(true);
+    // The die was consumed, whichever way it landed.
+    expect(JSON.stringify(state.rng)).not.toBe(rngBefore);
   });
 
   it("earlier revisions keep the old certainty: no roll, the blow just lands", () => {
-    let { state, me, victim, trollId } = creatureVsInvisible(12);
+    let { state, me, victim, skeletonId } = creatureVsInvisible(12);
     const lifeBefore = state.players.find((p) => p.id === victim.id)!.life;
     const rngBefore = JSON.stringify(state.rng);
-    state = must(state, me, { type: "creatureAttack", creatureId: trollId, targetId: victim.id });
+    state = must(state, me, { type: "creatureAttack", creatureId: skeletonId, targetId: victim.id });
     state = must(state, victim.id, { type: "pass" });
     expect(state.players.find((p) => p.id === victim.id)!.life).toBeLessThan(lifeBefore);
     // No die was consumed on the way.