fix(combat): _spell_combat_actions gates on _has_slot - with exhausted slots the cast is rejected (NO SPELL SLOT) and spell_combat resolves as a bare full attack at -2, strictly worse than the plain full attack; the policy now falls through (mirrors _choose_spell_action's slot gate) + 2 regression tests

src/pf1e_simulator/combat.py

@@ -8892,12 +8892,20 @@ def _emit_hex(
 def _spell_combat_actions(
     engine: CombatEngine, state: CombatantState, target: CombatantState
 ) -> tuple[Action, ...] | None:
-    """Misty's spell_combat (main) + inspire_courage (swift), or None if no offensive spell."""
+    """Misty's spell_combat (main) + inspire_courage (swift), None if not castable.
+
+    Slot gate (mirror of ``_choose_spell_action``): with no slot left for the
+    chosen spell the cast is rejected (``NO SPELL SLOT``), so the executor
+    would run the action as a bare full attack at -2 - strictly worse than the
+    plain full attack the policy would otherwise choose. Fall through instead.
+    """
     if state.resources_left.get("bardic_rounds", 0) <= 0:
         return None
     offensive = _find_offensive_spell(engine, state.combatant.spells, state, target)
     if offensive is None:
         return None
+    if not _has_slot(engine, state, offensive):
+        return None
     return (
         Action(kind="inspire_courage", target_id=target.combatant.id),
         Action(kind="spell_combat", target_id=target.combatant.id, spell_name=offensive),