Fix env save dialog fallback

electron/main.ts

@@ -1,5 +1,5 @@
 import { app, BrowserWindow, Menu, dialog, ipcMain } from "electron";
-import type { OpenDialogOptions } from "electron";
+import type { OpenDialogOptions, SaveDialogOptions } from "electron";
 import { readFile, writeFile } from "node:fs/promises";
 import path from "node:path";
 import { fileURLToPath } from "node:url";
@@ -55,11 +55,17 @@ ipcMain.handle("envhelper:open-file", async (event) => {
   };
 });
 
-ipcMain.handle("envhelper:save-file", async (_event, content: string) => {
-  const result = await dialog.showSaveDialog({
+ipcMain.handle("envhelper:save-file", async (event, content: string) => {
+  const owner = BrowserWindow.fromWebContents(event.sender);
+  const options = {
     defaultPath: ".env",
-    filters: [{ name: "Environment file", extensions: ["env"] }]
-  });
+    filters: [
+      { name: "Environment files", extensions: ["env", "txt"] },
+      { name: "All files", extensions: ["*"] }
+    ]
+  } satisfies SaveDialogOptions;
+
+  const result = owner ? await dialog.showSaveDialog(owner, options) : await dialog.showSaveDialog(options);
 
   if (result.canceled || !result.filePath) {
     return null;