- fix: apply per-level scaling to spell descriptions
- The description's per-level terms scale by the player's skill in the spell's line, not the character level
- The skill value reads its bonus word as the reference does: the high half unsigned over a positive value, the low half signed
- The $d and $o durations take the row's per-level term at the spell's own skill level
- $d reads a duration at or below 0, or no duration row, as until cancelled
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Co-Authored-By: Sam <samuv.eth@gmail.com>
