OptionalfixedLocked columns: cannot be reordered or resized.
Unique identifier for the column.
OptionallabelHeader display text.
OptionalnameFallback header text used when label is not provided.
OptionalsortableWhether the column can be clicked to sort. Defaults to true.
OptionalwidthCSS grid track value (e.g. '1fr' or '120px').
Column definition for header rows and tabular playlist / queue views.