feat: add copy & download actions for modal

fe-app-podkop/src/helpers/downloadAsTxt.ts

@@ -0,0 +1,15 @@
+export function downloadAsTxt(text: string, filename: string) {
+  const blob = new Blob([text], { type: 'text/plain;charset=utf-8' });
+
+  const link = document.createElement('a');
+  link.href = URL.createObjectURL(blob);
+
+  const safeName = filename.endsWith('.txt') ? filename : `${filename}.txt`;
+  link.download = safeName;
+
+  document.body.appendChild(link);
+  link.click();
+
+  document.body.removeChild(link);
+  URL.revokeObjectURL(link.href);
+}