Improve project downloading functionality and integrate download button into ProjectManager

src/hooks/useProject.ts

@@ -86,17 +86,6 @@ function useProject(id?: number | string) {
           },
         );
 
-        if (String(id) === '5') {
-          const url = URL.createObjectURL(projectFile);
-          const link = document.createElement('a');
-          link.href = url;
-          link.download = projectFile.name;
-          document.body.appendChild(link);
-          link.click();
-          link.remove();
-          URL.revokeObjectURL(url);
-        }
-
         return {
           pads,
           scenes,