fix: add WebSocket polyfill for Electron main process

Resolves ReferenceError where WebSocket was undefined in main process.
Implements dual WebSocket loading strategy with proper environment
detection and fallback mechanisms for Node.js contexts.

Author: DepsCian

frontend/util/wsutil.ts

@@ -3,15 +3,14 @@
 
 import type { WebSocket as NodeWebSocketType } from "ws";
 
-let NodeWebSocket: typeof NodeWebSocketType = null;
+let NodeWebSocket: any = null;
 
-if (typeof window === "undefined") {
-    // Necessary to avoid issues with Rollup: https://github.com/websockets/ws/issues/2057
-    import("ws")
-        .then((ws) => (NodeWebSocket = ws.default))
-        .catch((e) => {
-            console.log("Error importing 'ws':", e);
-        });
+if (typeof window === "undefined" || (typeof process !== "undefined" && process.type === "browser")) {
+    try {
+        NodeWebSocket = require("ws").WebSocket;
+    } catch (e) {
+        import("ws").then((ws) => (NodeWebSocket = ws.default)).catch((e) => console.log("ws import error:", e));
+    }
 }
 
 type ComboWebSocket = NodeWebSocketType | WebSocket;
@@ -20,6 +19,9 @@ function newWebSocket(url: string, headers: { [key: string]: string }): ComboWeb
     if (NodeWebSocket) {
         return new NodeWebSocket(url, { headers });
     } else {
+        if (typeof WebSocket === "undefined") {
+            throw new Error("WebSocket not available in this environment");
+        }
         return new WebSocket(url);
     }
 }