Improved mobile and theme-aware usability for payout structures

The payout structure previews in Payout structures are now responsive and better aligned with your theme preferences. On mobile devices, the interface adapts with bottom-sheet drawers and a compact interactive mini chart, making it easier to review and adjust payouts on the go. A new hover card replaces tooltips on desktop for clearer information, and mobile step indicators provide a more digestible progress view during payout setup in Payouts.