Wire window controls to main window

electron/main.ts

@@ -5,6 +5,8 @@ import { fileURLToPath } from "node:url";
 
 const __dirname = path.dirname(fileURLToPath(import.meta.url));
 
+let mainWindow: BrowserWindow | null = null;
+
 async function createWindow() {
   const win = new BrowserWindow({
     width: 1220,
@@ -22,6 +24,13 @@ async function createWindow() {
     }
   });
 
+  mainWindow = win;
+  win.on("closed", () => {
+    if (mainWindow === win) {
+      mainWindow = null;
+    }
+  });
+
   Menu.setApplicationMenu(null);
 
   if (!app.isPackaged) {
@@ -48,27 +57,25 @@ ipcMain.handle("envhelper:open-file", async () => {
   };
 });
 
-ipcMain.handle("envhelper:window-minimize", (event) => {
-  BrowserWindow.fromWebContents(event.sender)?.minimize();
+ipcMain.on("envhelper:window-minimize", () => {
+  mainWindow?.minimize();
 });
 
-ipcMain.handle("envhelper:window-toggle-maximize", (event) => {
-  const win = BrowserWindow.fromWebContents(event.sender);
-  if (!win) {
-    return false;
+ipcMain.on("envhelper:window-toggle-maximize", () => {
+  if (!mainWindow) {
+    return;
   }
 
-  if (win.isMaximized()) {
-    win.unmaximize();
-    return false;
+  if (mainWindow.isMaximized()) {
+    mainWindow.unmaximize();
+    return;
   }
 
-  win.maximize();
-  return true;
+  mainWindow.maximize();
 });
 
-ipcMain.handle("envhelper:window-close", (event) => {
-  BrowserWindow.fromWebContents(event.sender)?.close();
+ipcMain.on("envhelper:window-close", () => {
+  mainWindow?.close();
 });
 
 ipcMain.handle("envhelper:save-file", async (_event, content: string) => {