fix: fullscreen button not working

js/src/main.ts

@@ -28,6 +28,7 @@ const createWindow = () => {
     width: 715,
     height: 550,
     resizable: false,
+    fullscreenable: true,
     frame: false,
     webPreferences: {
       preload: path.join(__dirname, 'preload.js'),
@@ -60,6 +61,10 @@ ipcMain.on('window:maximize', (event) => {
 ipcMain.on('window:close', (event) => {
   BrowserWindow.fromWebContents(event.sender)?.close();
 });
+ipcMain.on('window:fullscreen', (event) => {
+  const win = BrowserWindow.fromWebContents(event.sender);
+  if (win) win.setFullScreen(!win.isFullScreen());
+});
 
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