Roll graded legs into bet status + payout split. Power plays are
all-or-nothing; Flex plays look up the standard multiplier and scale
the slip's displayed multiplier proportionally so any boost flows
through to the demoted payout.
Pending semantics:
Any 'pending' surviving leg → bet stays 'pending'.
'dnp' legs are filtered out before counting (caller should have
already recomputed multiplier via markLegDnp).
Roll graded legs into bet status + payout split. Power plays are all-or-nothing; Flex plays look up the standard multiplier and scale the slip's displayed multiplier proportionally so any boost flows through to the demoted payout.
Pending semantics: