It works-ish

electron/main.ts

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+import { app, BrowserWindow } from "electron";
+import path from "node:path";
+import started from "electron-squirrel-startup";
+
+// Handle creating/removing shortcuts on Windows when installing/uninstalling.
+if (started) {
+  app.quit();
+}
+
+const createWindow = () => {
+  // Create the browser window.
+  const mainWindow = new BrowserWindow({
+    width: 800,
+    height: 600,
+    webPreferences: {
+      preload: path.join(import.meta.dirname, "preload.js"),
+    },
+  });
+
+  // and load the index.html of the app.
+  if (MAIN_WINDOW_VITE_DEV_SERVER_URL) {
+    mainWindow.loadURL(MAIN_WINDOW_VITE_DEV_SERVER_URL);
+    mainWindow.webContents.on("did-frame-finish-load", () => {
+      mainWindow.webContents.openDevTools({ mode: "detach" });
+    });
+  } else {
+    mainWindow.loadFile(
+      path.join(
+        import.meta.dirname,
+        `../renderer/${MAIN_WINDOW_VITE_NAME}/index.html`,
+      ),
+    );
+  }
+};
+
+// This method will be called when Electron has finished
+// initialization and is ready to create browser windows.
+// Some APIs can only be used after this event occurs.
+app.on("ready", createWindow);
+
+// Quit when all windows are closed, except on macOS. There, it's common
+// for applications and their menu bar to stay active until the user quits
+// explicitly with Cmd + Q.
+app.on("window-all-closed", () => {
+  if (process.platform !== "darwin") {
+    app.quit();
+  }
+});
+
+app.on("activate", () => {
+  // On OS X it's common to re-create a window in the app when the
+  // dock icon is clicked and there are no other windows open.
+  if (BrowserWindow.getAllWindows().length === 0) {
+    createWindow();
+  }
+});
+
+// In this file you can include the rest of your app's specific main process
+// code. You can also put them in separate files and import them here.