002c441f50
Adds the purchase UI for extra schedules, mirroring preview branches ## Changes - `setSchedulesAddOn` platform client + `SetSchedulesAddOnService` (purchase + quota-increase via Plain). - `ScheduleListPresenter` surfaces add-on / quota / pricing; `checkSchedule` counts purchased schedules toward the limit (`base + purchased`). - `PurchaseSchedulesModal` on the Schedules page — bought in **bundles of 1,000 ($10/mo each)**; bundle increments enforced client-side and in the action's zod schema.