fix(combat): correct hex and AoE DCs, DR bypassed by spells

tests/test_spells.py

@@ -395,14 +395,14 @@ class TestSpellDcScalesWithLevel:
 
 
 class TestSpellDamageWithDr:
-    """Given: a target with DR vs the spell's damage type
+    """Given: a target with DR 5/- (bypassed by nothing)
     When: a spell deals damage
-    Then: DR is applied after save halving."""
+    Then: DR does NOT reduce spell damage (PF1e: spells/energy bypass DR)."""
 
-    def test_dr_reduces_spell_damage(self) -> None:
+    def test_dr_does_not_reduce_spell_damage(self) -> None:
         caster = _make_caster()
         target = _make_target(hp_max=200)
-        # DR 5/- (bypassed by nothing) applies to all damage including fire
+        # DR 5/- does NOT apply to spell damage
         target_with_dr = target.model_copy(update={
             "dr": DamageReduction(amount=5, bypass=frozenset()),
         })
@@ -411,8 +411,8 @@ class TestSpellDamageWithDr:
         engine, c, t = _make_engine(caster, target_with_dr, queue)
         hp_before = t.hp
         engine._cast_spell(c, t, "Fireball")
-        # Save fails (2), 6d6 rolls all 3 = 18 damage, DR 5/- -> 13 damage
-        assert t.hp == hp_before - 13
+        # Save fails (2), 6d6 rolls all 3 = 18 damage, DR ignored -> 18 damage
+        assert t.hp == hp_before - 18
 
 
 class TestSummonMonster: