editCellStyles

Apply formatting styles to cells without changing values.

IMPORTANT: After using fillCells, you MUST call this to apply formatting to the filled range.

Parameter	Type		Description
sheet	string	required	Sheet name to operate on
apply	object[]	required	Array of style applications
apply[].target	string	required	Cell or range reference (e.g., “A1”, “B2:D10”)
apply[].styles	object	required	Cell style properties
note	string	required	Description of this operation for version history