This update improves how text is displayed in Gantt chart task boxes by automatically rotating text when there isn't enough horizontal space. The fix provides better calculations to determine when text rotation is needed, resulting in a cleaner and more readable chart display regardless of task box size.

Following the fix done in #50763, this changes achieves a better behavior of the fix, where we make a better calculation to know when we should rotate the text when we don't have space to display it horizontally.

Forward-Port-Of: odoo/enterprise#56151