parseDuration
Parses a duration string into a Duration object.
Handles formats: "2 h 30 min", "45 min", "1 h"
Return
Duration if parsing succeeds, null otherwise
Parameters
durationStr
The formatted duration string
Parses a duration string into a Duration object.
Handles formats: "2 h 30 min", "45 min", "1 h"
Duration if parsing succeeds, null otherwise
The formatted duration string