Initial crossword addition and arcade redesign

src/app/api/arcade/packs/[id]/layout/route.ts

@@ -0,0 +1,23 @@
+import { NextRequest, NextResponse } from "next/server";
+import { generateCrosswordLayout } from "@/lib/arcade/crosswordEngine";
+import type { CrosswordSize } from "@/types/arcade";
+import { getArcadePack } from "@/services/arcadeService";
+
+const CROSSWORD_SIZES = new Set<CrosswordSize>(["mini", "standard", "large", "extra-large"]);
+
+export async function GET(
+  request: NextRequest,
+  context: { params: Promise<{ id: string }> }
+) {
+  const { id } = await context.params;
+  const sizeValue = request.nextUrl.searchParams.get("size") ?? "standard";
+  if (!CROSSWORD_SIZES.has(sizeValue as CrosswordSize)) {
+    return NextResponse.json({ error: "A valid Crossword size is required." }, { status: 400 });
+  }
+  const pack = await getArcadePack(id);
+  if (!pack || pack.gameType !== "crossword" || pack.normalized.type !== "crossword") {
+    return NextResponse.json({ error: "Crossword pack not found" }, { status: 404 });
+  }
+  const size = sizeValue as CrosswordSize;
+  return NextResponse.json(generateCrosswordLayout(pack.normalized, size, `crossword-hub-preview-v1:${id}:${size}`));
+}