feat: add AFC Store with MercadoPago purchases and prize redemption

Players can now buy AfterCoin with real money (MercadoPago Checkout Pro,
$15 MXN/AFC) and redeem AFC for gift cards or cash withdrawals. Admin
fulfills redemptions manually.

- Bridge: payments + redemptions tables, CRUD routes, PATCH auth
- Next.js API: verify-disk, balance, create-preference, webhook (idempotent
  minting with HMAC signature verification), redeem, payment/redemption history
- Frontend: hub, buy flow (4 packages + custom), redeem flow (gift cards +
  cash out), success/failure/pending pages, history with tabs, 8 components
- i18n: full English + Spanish translations
- Infra: nginx /api/afc/ → Next.js, docker-compose env vars, .env.example

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/web/src/app/api/afc/payments/route.ts

@@ -0,0 +1,16 @@
+import { NextRequest, NextResponse } from "next/server";
+import { bridgeGet } from "../lib/bridge";
+
+export async function GET(req: NextRequest) {
+  const diskId = req.nextUrl.searchParams.get("diskId");
+  if (!diskId) {
+    return NextResponse.json({ error: "diskId is required" }, { status: 400 });
+  }
+  try {
+    const data = await bridgeGet(`/api/payments/history/${diskId}`);
+    return NextResponse.json(data);
+  } catch (e: unknown) {
+    const message = e instanceof Error ? e.message : "Unknown error";
+    return NextResponse.json({ error: message }, { status: 500 });
+  }
+}