chore: revert some changes

ui/actions/scans/scans.ts

@@ -348,22 +348,13 @@ export const getThreatscoreReport = async (scanId: string) => {
       );
     }
 
-    const filename = `scan-${scanId}-threatscore.pdf`;
-
-    const blob = await response.blob();
-    const url = URL.createObjectURL(blob);
-    const a = document.createElement("a");
-    a.href = url;
-    a.download = filename;
-    document.body.appendChild(a);
-    a.click();
-    document.body.removeChild(a);
-    URL.revokeObjectURL(url);
+    const arrayBuffer = await response.arrayBuffer();
+    const base64 = Buffer.from(arrayBuffer).toString("base64");
 
     return {
       success: true,
-      data: url,
-      filename,
+      data: base64,
+      filename: `scan-${scanId}-threatscore.pdf`,
     };
   } catch (error) {
     return {