Integrate buzzer functionality into Bun server and update workflows

Reverts Express server setup for the buzzer, migrates all functionality to a Bun server, and updates the workflow to execute the Bun server directly.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: f3ac8eb3-f610-4678-ab6e-ebf900098be4
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Replit-Commit-Event-Id: c1942b0a-0cf4-4ca9-9b5f-f80287c102f2
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server/routes.ts

@@ -1,46 +1,9 @@
 import type { Express } from "express";
 import { createServer, type Server } from "http";
-import { WebSocketServer } from "ws";
-import fs from "fs";
-import path from "path";
-import { handleMessage, handleClose } from "./buzzer-ws";
 
 export async function registerRoutes(
   httpServer: Server,
-  app: Express
+  _app: Express
 ): Promise<Server> {
-  // Serve buzzer static files
-  const publicDir = path.resolve(process.cwd(), "src/public");
-
-  app.get("/", (_req, res) => {
-    res.setHeader("Content-Type", "text/html; charset=utf-8");
-    res.send(fs.readFileSync(path.join(publicDir, "index.html"), "utf-8"));
-  });
-
-  app.get("/styles.css", (_req, res) => {
-    res.setHeader("Content-Type", "text/css");
-    res.send(fs.readFileSync(path.join(publicDir, "styles.css"), "utf-8"));
-  });
-
-  app.get("/script.js", (_req, res) => {
-    res.setHeader("Content-Type", "text/javascript");
-    res.send(fs.readFileSync(path.join(publicDir, "script.js"), "utf-8"));
-  });
-
-  // WebSocket server for buzzer
-  const wss = new WebSocketServer({ server: httpServer, path: "/ws" });
-
-  wss.on("connection", (ws) => {
-    ws.on("message", (data) => {
-      if (typeof data === "string") {
-        handleMessage(ws, data);
-      } else {
-        handleMessage(ws, data.toString());
-      }
-    });
-    ws.on("close", () => handleClose(ws));
-    ws.on("error", () => { try { ws.close(); } catch {} });
-  });
-
   return httpServer;
 }