feat: add catch-all API route with handler imports

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

backend/src/app/api/[...path]/route.ts

@@ -0,0 +1,28 @@
+import { dispatch } from '@/lib/router';
+import { NextRequest, NextResponse } from 'next/server';
+
+// Import all handlers to register their routes
+import '@/lib/handlers/player';
+import '@/lib/handlers/battlepass';
+import '@/lib/handlers/game';
+import '@/lib/handlers/payments';
+import '@/lib/handlers/leaderboard';
+import '@/lib/handlers/cards';
+import '@/lib/handlers/equipment';
+import '@/lib/handlers/arsenal';
+import '@/lib/handlers/marketplace';
+import '@/lib/handlers/contracts';
+
+export const dynamic = 'force-dynamic';
+
+export async function GET(request: NextRequest, { params }: { params: { path: string[] } }) {
+  return dispatch(request, params.path, 'GET');
+}
+
+export async function POST(request: NextRequest, { params }: { params: { path: string[] } }) {
+  return dispatch(request, params.path, 'POST');
+}
+
+export async function PUT(request: NextRequest, { params }: { params: { path: string[] } }) {
+  return dispatch(request, params.path, 'PUT');
+}