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/Board.svelte

@@ -1,6 +1,8 @@
 <script lang="ts">
+  import type { Component } from "svelte";
   import type { GameView } from "@wizwar/engine";
   import type { Side } from "@wizwar/engine";
+  import type { BoardFx } from "./fx";
   import { colorIndexOf as sharedColorIndex, wizardColor } from "./colors";
   import { CREATURE_ART, objectArt, TERRAIN_ART, tokenArt } from "./art";
   import TokenArt from "./TokenArt.svelte";
@@ -51,11 +53,10 @@
     ghostSlots?: { x: number; y: number }[] | null;
     onGhostClick?: (origin: { x: number; y: number }) => void;
     /** Short-lived spell flourishes; purely cosmetic. */
-    effects?: import("./fx").BoardFx[] | null;
+    effects?: BoardFx[] | null;
   } = $props();
 
 
-
   const SECTOR = 5;
   /** Ghost slots can lie beyond the assembled maze — on any side, including
    * negative coordinates (the maze renormalizes after the landing). The
@@ -587,8 +588,9 @@
   <!-- spell flourishes: one sprite component per effect (src/fx-sprites/) -->
   <g class="fx-layer" aria-hidden="true">
     {#each effects ?? [] as fx (fx.id)}
-      {@const Sprite = FX_SPRITES[fx.kind]}
-      <Sprite fx={fx as never} />
+      <!-- One cast at the dispatch seam; the registry stays exhaustive. -->
+      {@const Sprite = FX_SPRITES[fx.kind] as Component<{ fx: BoardFx }>}
+      <Sprite {fx} />
     {/each}
   </g>
 </svg>
@@ -749,57 +751,6 @@
     stroke-width: 1.6;
     pointer-events: none;
   }
-  .fx-dust { fill: rgba(160, 150, 130, 0.75); animation: fx-drift 0.7s ease-out forwards; }
-  .fx-dust.late { animation-delay: 0.09s; }
-  .fx-dust.later { animation-delay: 0.17s; }
-
-  @keyframes fx-fade { 70% { opacity: 1; } 100% { opacity: 0; } }
-  @keyframes fx-flicker {
-    0% { opacity: 0; } 15% { opacity: 1; } 40% { opacity: 0.3; }
-    60% { opacity: 1; } 100% { opacity: 0; }
-  }
-  @keyframes fx-ring {
-    0% { opacity: 0.95; transform: scale(1); }
-    100% { opacity: 0; transform: scale(5); }
-  }
-  @keyframes fx-ring-small {
-    0% { opacity: 0.9; transform: scale(1); }
-    100% { opacity: 0; transform: scale(2.6); }
-  }
-  @keyframes fx-shield-pulse {
-    0% { opacity: 0; transform: scale(0.6); }
-    30% { opacity: 1; transform: scale(1.1); }
-    60% { transform: scale(0.95); }
-    100% { opacity: 0; transform: scale(1.15); }
-  }
-  @keyframes fx-drop {
-    0% { opacity: 0.9; transform: translateY(0); }
-    100% { opacity: 0; transform: translateY(-14px); }
-  }
-  @keyframes fx-drift {
-    0% { opacity: 0.8; transform: translateY(0) scale(1); }
-    100% { opacity: 0; transform: translateY(-10px) scale(1.8); }
-  }
-  @keyframes fx-pow-hit {
-    0% { opacity: 0; transform: scale(0.3) rotate(-15deg); }
-    25% { opacity: 1; transform: scale(1.25) rotate(5deg); }
-    55% { transform: scale(1) rotate(0deg); }
-    100% { opacity: 0; transform: scale(1.05); }
-  }
-  @keyframes fx-claw-rake {
-    0% { opacity: 0; transform: translateY(-6px); }
-    20% { opacity: 1; }
-    100% { opacity: 0; transform: translateY(6px); }
-  }
-  @keyframes fx-swallow {
-    0% { opacity: 0.95; transform: scale(1) rotate(0deg); }
-    100% { opacity: 0; transform: scale(0.05) rotate(50deg); }
-  }
-  @keyframes fx-spin {
-    0% { opacity: 0; transform: rotate(0deg) scale(0.5); }
-    30% { opacity: 1; }
-    100% { opacity: 0; transform: rotate(90deg) scale(1.1); }
-  }
   .warp-dest {
     fill: none;
     stroke: #2e7d32;