When one enters a string such as "10.1063/1.5001261", the calculator is invoked. Instead, it would be nice if kagi would be able to show a widget for the underlying document (or show doi.org/10.1063/1.5001261 as the first result).
Although its not a fixed rule, the DOIs usually look like "10.XXXX/suffix" or "100.XXXX/suffix". One could also check, using the doi.org api, whether such a string corresponds to a DOI, or whether the calculator is more appropriate to show.
Alternatively, the syntax could also be limited to "doi:prefix/suffix"
