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/web/src/fx-sprites/Bolt.svelte

@@ -51,7 +51,7 @@
   }
   .bolt .fork {
     fill: none;
-    stroke: #fff6b0;
+    stroke: #f5d54a;
     stroke-width: 1.6;
     stroke-linejoin: round;
   }
@@ -61,7 +61,6 @@
     stroke-width: 2;
     stroke-linejoin: round;
   }
-  .bolt .fork { stroke: #f5d54a; }
   .bolt { animation: bolt-flicker 0.5s steps(2, jump-none) forwards; }
   @keyframes bolt-flicker {
     0% { opacity: 0; } 15% { opacity: 1; } 40% { opacity: 0.3; }

packages/web/src/fx-sprites/DustPuff.svelte

@@ -20,9 +20,9 @@
 </script>
 
 <g style={`--ax: ${away.x}px; --ay: ${away.y}px; --bx: ${-away.x}px; --by: ${away.y}px`}>
-  <circle cx={c.x - 6} cy={c.y} r="7" fill={`url(#dust-soft-${uid})`} class="puff there" />
+  <circle cx={c.x - 6} cy={c.y} r="7" fill={`url(#dust-soft-${uid})`} class="puff" />
   <circle cx={c.x + 5} cy={c.y - 2} r="5" fill={`url(#dust-soft-${uid})`} class="puff back late" />
-  <circle cx={c.x} cy={c.y + 3} r="6" fill={`url(#dust-soft-${uid})`} class="puff there later" />
+  <circle cx={c.x} cy={c.y + 3} r="6" fill={`url(#dust-soft-${uid})`} class="puff later" />
   <g class="grit">
     <circle cx={c.x - 4} cy={c.y - 5} r="1.3" />
     <circle cx={c.x + 6} cy={c.y + 2} r="1.6" />

packages/web/src/fx-sprites/index.ts

@@ -2,7 +2,7 @@
 // file; to add one, create the component, extend BoardFx in ../fx.ts, and
 // register it here.
 import type { Component } from "svelte";
-import type { BoardFx } from "../fx";
+import type { BoardFx, FxOf } from "../fx";
 import Absorb from "./Absorb.svelte";
 import Bolt from "./Bolt.svelte";
 import Burst from "./Burst.svelte";
@@ -29,7 +29,7 @@ import ThornSnap from "./ThornSnap.svelte";
 import Waterbolt from "./Waterbolt.svelte";
 import Whiff from "./Whiff.svelte";
 
-export const FX_SPRITES: Record<BoardFx["kind"], Component<{ fx: never }>> = {
+export const FX_SPRITES: { [K in BoardFx["kind"]]: Component<{ fx: FxOf<K> }> } = {
   fireball: Fireball,
   waterbolt: Waterbolt,
   bolt: Bolt,
@@ -58,4 +58,4 @@ export const FX_SPRITES: Record<BoardFx["kind"], Component<{ fx: never }>> = {
   "edge-dust": DustPuff,
   "sector-spin": SectorGrind,
   "sector-slide": SectorGrind,
-} as never;
+};