Harden packaged Electron startup for remote/Xwayland sessions

Disable GPU/accelerated features and set safe defaults for packaged
builds to avoid crashes in Xwayland/remote environments (prevents
GPU/VAAPI errors). File dialog behavior and the new shared folder
memory remain unchanged.

main.js

@@ -179,6 +179,20 @@ if (process.platform === 'linux') {
     app.commandLine.appendSwitch('xdg-portal-required-version', '999');
 }
 
+// Add more robust flags for packaged builds in remote/Xwayland environments
+if (app.isPackaged) {
+    try {
+	app.commandLine.appendSwitch('disable-gpu');
+	app.commandLine.appendSwitch('disable-gpu-compositing');
+	app.commandLine.appendSwitch('disable-accelerated-2d-canvas');
+	app.commandLine.appendSwitch('disable-accelerated-video-decode');
+	app.commandLine.appendSwitch('disable-dev-shm-usage');
+	app.commandLine.appendSwitch('disable-features', 'VaapiVideoDecoder,VaapiVideoEncoder,VizDisplayCompositor');
+    } catch (e) {
+	console.log('could not append packaged startup switches:', e);
+    }
+}
+
 function getDefaultDialogPath() {
     return currentWorkPath || process.cwd();
 }