fix page export failure when title contains non-ASCII characters (#309)

apps/server/src/integrations/export/export.controller.ts

@@ -61,7 +61,8 @@ export class ImportController {
 
     res.headers({
       'Content-Type': getMimeType(fileExt),
-      'Content-Disposition': 'attachment; filename="' + fileName + '"',
+      'Content-Disposition':
+        'attachment; filename="' + encodeURIComponent(fileName) + '"',
     });
 
     res.send(rawContent);