fix(rules): harmless spells on willing targets forgo the save roll - SpellSpec gains a data-driven 'harmless' flag set on the 29 SRD '(harmless)' spells (verified one by one against the KB); a same-side/self target consumes NO save die (SRD saving-throw.md: '(harmless) ... can attempt a saving throw if it desires' + 'Voluntarily Giving up a Saving Throw'), while hostile targets and undead receiving a cure (harmful to them, Will half for undead damage) keep the roll; snapshot spell summaries expose 'harmless'; golden transcript unchanged (no harmless-save cast in it); +8 tests, 3 fixtures re-pinned for the removed die

tests/test_cure_undead.py

@@ -2,10 +2,11 @@
 
 SRD "Cure Light Wounds" (spells/cure-light-wounds.md): "Since undead are
 powered by negative energy, this spell deals damage to them instead of curing
-their wounds. An undead creature can apply spell resistance, and can attempt
-a Will save to take half damage." The engine resolves SR upstream and the
+their wounds. An undead creature can apply spell resistance, and can attempt a
+Will save to take half damage." The engine resolves SR upstream and the
 rolled Will save halves the damage here; living targets keep healing exactly
-as before.
+as before — and as a willing same-side target of a (harmless) spell a living
+target forgoes the Will roll entirely (no die consumed).
 """
 
 from __future__ import annotations
@@ -70,9 +71,12 @@ class TestCureDamagesUndead:
     def test_living_target_still_heals(self) -> None:
         """Given: a living ally at 5/20 hp
         When: cured with a die roll of 8
-        Then: it heals 13 hp (behavior unchanged for the living)."""
+        Then: it heals 13 hp (behavior unchanged for the living). The ally is
+        a willing target of a (harmless) spell, so NO Will die is consumed
+        (SRD saving-throw.md: "(harmless)" + "Voluntarily Giving up a Saving
+        Throw") — the queue holds only the heal die."""
         engine, c, t = _make_engine(
-            _caster(), _make_target(), [1, 8], target_pos=(1, 0), target_side="players"
+            _caster(), _make_target(), [8], target_pos=(1, 0), target_side="players"
         )
         t.hp = 5
         engine._cast_spell(c, t, "Cure Light Wounds")
@@ -96,7 +100,7 @@ class TestCureUndeadAttrition:
 
     def test_living_heal_records_no_damage(self) -> None:
         engine, c, t = _make_engine(
-            _caster(), _make_target(), [1, 8], target_pos=(1, 0), target_side="players"
+            _caster(), _make_target(), [8], target_pos=(1, 0), target_side="players"
         )
         t.hp = 5
         engine._cast_spell(c, t, "Cure Light Wounds")