Every flourish gets its own file, and a workshop to watch them in

The effects move out of Board.svelte into src/fx-sprites/ — one
component per flourish, markup and animation CSS together, so editing
the fireball means opening Fireball.svelte and nothing else. A
registry (index.ts) maps kind to sprite; Board renders through it.
The event mapping stays in fx.ts.

And a viewer: /?fx opens the Flourish Workshop — every sprite on a
labeled parchment tile, replaying on a 2.2-second beat. Under the dev
server, editing any sprite file hot-reloads the gallery mid-loop.

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

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

@@ -0,0 +1,22 @@
+<script lang="ts">
+  import type { FxOf } from "../fx";
+  import { center } from "./geom";
+  let { fx }: { fx: FxOf<"absorb"> } = $props();
+  const c = $derived(center(fx.at));
+</script>
+
+<rect x={c.x - 9} y={c.y - 13} width="18" height="26" rx="2" class="absorb"
+  style={`transform-origin: ${c.x}px ${c.y}px`} />
+
+<style>
+  .absorb {
+    fill: #f6f0df;
+    stroke: #43331f;
+    stroke-width: 1.5;
+    animation: swallow 0.65s ease-in forwards;
+  }
+  @keyframes swallow {
+    0% { opacity: 0.95; transform: scale(1) rotate(0deg); }
+    100% { opacity: 0; transform: scale(0.05) rotate(50deg); }
+  }
+</style>