Add vpinball: a browser Visual Pinball player

Next.js app that plays real .vpx tables via @valknar/vpinball-wasm
(WebAssembly Visual Pinball). Demo mode with the bundled default
table, drag-and-drop custom table upload, a cabinet-styled UI with a
coin-door HUD (fullscreen/stats/info/eject), a custom 404 page, PWA
support (hand-rolled service worker), and a static Docker Compose
deployment behind nginx.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012hQoM3jJT1Lx7CMTciMzvD

components/pinball/PinballCanvas.tsx

@@ -0,0 +1,14 @@
+"use client";
+
+import dynamic from "next/dynamic";
+import type { PinballCanvasImplProps } from "./PinballCanvasImpl";
+
+// The engine touches window/canvas/WebGL as soon as it mounts, so it's kept
+// out of the server render entirely rather than just deferring to an effect.
+const PinballCanvasImpl = dynamic<PinballCanvasImplProps>(() => import("./PinballCanvasImpl"), {
+  ssr: false,
+});
+
+export default function PinballCanvas(props: PinballCanvasImplProps) {
+  return <PinballCanvasImpl {...props} />;
+}