Ars 'n Spells

## [3.3.4] - 2026-09-13

### Fixed

- Fixed Iron's book casts finishing their windup without producing an effect when Ars mana had a fractional balance near a float precision boundary.
- Apply the final spell cost once, including discounts and free casts, and avoid a second native mana write after ANS pays.
- Failed first channel pulses no longer consume a scroll or start a payment-failure cooldown. Channels that already produced effects keep native interruption rules.
- Optional category cooldowns now start with native cooldowns, including the end of recast sequences.
- Preserve observed refunds after partial or throwing resource operations. Unresolved credits survive orderly server restarts and cannot be paid twice.
- Clean up casting validation on cancellation and exceptions, preserve native restrictions, and reject stale cast identities or changed pricing before effects.