feat(integration): WS bridge + Tower + payment panel + E2E test [10/10 PASS] (#26)

artifacts/api-server/src/app.ts

@@ -1,8 +1,12 @@
 import express, { type Express } from "express";
 import cors from "cors";
+import path from "path";
+import { fileURLToPath } from "url";
 import router from "./routes/index.js";
 import { responseTimeMiddleware } from "./middlewares/response-time.js";
 
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+
 const app: Express = express();
 
 app.set("trust proxy", 1);
@@ -45,7 +49,16 @@ app.use(responseTimeMiddleware);
 
 app.use("/api", router);
 
-app.get("/", (_req, res) => res.redirect("/api/ui"));
+// ── Tower (Matrix 3D frontend) ───────────────────────────────────────────────
+// Serve the pre-built Three.js world at /tower. The Matrix's WebSocket client
+// auto-connects to /api/ws on the same host.
+// __dirname resolves to artifacts/api-server/dist/ at runtime.
+// Go up three levels to reach workspace root, then into the-matrix/dist.
+const towerDist = path.join(__dirname, "..", "..", "..", "the-matrix", "dist");
+app.use("/tower", express.static(towerDist));
+app.get("/tower/*splat", (_req, res) => res.sendFile(path.join(towerDist, "index.html")));
+
+app.get("/", (_req, res) => res.redirect("/tower"));
 app.get("/api", (_req, res) => res.redirect("/api/ui"));
 
 export default app;