first commit

apps/api-gateway/src/media-content-disposition.ts

@@ -0,0 +1,5 @@
+export function buildContentDisposition(type: 'inline' | 'attachment', fileName: string) {
+  const asciiFallback = fileName.replace(/[^\x20-\x7E]+/g, '_').replace(/["\\]/g, '_') || 'file';
+  const encoded = encodeURIComponent(fileName);
+  return `${type}; filename="${asciiFallback}"; filename*=UTF-8''${encoded}`;
+}