fix(Map): Unified settings. Second part: Import/Export

assets/js/hooks/Mapper/utils/saveToFile.ts

@@ -0,0 +1,36 @@
+export function saveTextFile(filename: string, content: string) {
+  const blob = new Blob([content], { type: 'text/plain;charset=utf-8' });
+  const url = URL.createObjectURL(blob);
+
+  const a = document.createElement('a');
+  a.href = url;
+  a.download = filename;
+
+  // эмулируем клик
+  document.body.appendChild(a);
+  a.click();
+  document.body.removeChild(a);
+
+  // освобождаем URL
+  URL.revokeObjectURL(url);
+}
+
+export async function saveTextFileInteractive(filename: string, content: string) {
+  if (!('showSaveFilePicker' in window)) {
+    throw new Error('File System Access API is not supported in this browser.');
+  }
+
+  const handle = await (window as any).showSaveFilePicker({
+    suggestedName: filename,
+    types: [
+      {
+        description: 'Text Files',
+        accept: { 'text/plain': ['.txt', '.json'] },
+      },
+    ],
+  });
+
+  const writable = await handle.createWritable();
+  await writable.write(content);
+  await writable.close();
+}