fix: Exclude header controls from dashboard PDF export (#27068)

superset-frontend/src/types/dom-to-pdf.d.ts

@@ -27,6 +27,7 @@ declare module 'dom-to-pdf' {
     filename: string;
     image: Image;
     html2canvas: object;
+    excludeClassNames?: string[];
   }
 
   const domToPdf = (

superset-frontend/src/utils/downloadAsPdf.ts

@@ -61,6 +61,7 @@ export default function downloadAsPdf(
       filename: `${generateFileStem(description)}.pdf`,
       image: { type: 'jpeg', quality: 1 },
       html2canvas: { scale: 2 },
+      excludeClassNames: ['header-controls'],
     };
     return domToPdf(elementToPrint, options)
       .then(() => {