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/Claw.svelte

@@ -0,0 +1,26 @@
+<script lang="ts">
+  import type { FxOf } from "../fx";
+  import { center } from "./geom";
+  let { fx }: { fx: FxOf<"claw"> } = $props();
+  const c = $derived(center(fx.at));
+</script>
+
+<g class="claw">
+  <line x1={c.x - 10} y1={c.y - 14} x2={c.x - 2} y2={c.y + 12} />
+  <line x1={c.x - 2} y1={c.y - 16} x2={c.x + 6} y2={c.y + 10} />
+  <line x1={c.x + 6} y1={c.y - 14} x2={c.x + 14} y2={c.y + 12} />
+</g>
+
+<style>
+  .claw line {
+    stroke: #b3372b;
+    stroke-width: 3;
+    stroke-linecap: round;
+  }
+  .claw { animation: rake 0.55s ease-out forwards; }
+  @keyframes rake {
+    0% { opacity: 0; transform: translateY(-6px); }
+    20% { opacity: 1; }
+    100% { opacity: 0; transform: translateY(6px); }
+  }
+</style>