fix(combat): apply save negates to targeted spell damage effects

src/pf1e_simulator/spells.py

@@ -35,7 +35,8 @@ SaveType = Literal["fort", "ref", "will", "none"]
 class DamageEffect:
     formula: DiceExpr
     types: tuple[str, ...]
-    half_on_save: bool = True
+    # False = save negates (targeted); True = half damage on save (ray/line/cone/AoE)
+    half_on_save: bool = False
 
 
 @dataclass(frozen=True)
@@ -216,7 +217,7 @@ def _parse_effect(data: Json) -> SpellEffect:
         return DamageEffect(
             formula=parse_dice(_as_str(effect["formula"])),
             types=tuple(_as_str(t) for t in _as_list(effect["types"])),
-            half_on_save=bool(effect.get("half_on_save", True)),
+            half_on_save=bool(effect.get("half_on_save", False)),
         )
     if effect_type == "condition":
         return ConditionEffect(