Loyalty System API: Level Claiming and Calculated Reward Missons

Two new endpoints in the Loyalty System API. Level rewards are no longer granted automatically; players claim them through a new endpoint, surfaced by a new claimableLevels field on the player level response. Calculated-reward missions, which issue dynamic reward amounts per qualifying event using a formula, now have their own listing endpoint.

See claimLevelReward, getPlayerCalculatedRewards, and the updated Custom widget UI integration guide.