✅ Variable ap cost x exceeds ap raises

Category	Ability
Status	Passing
Test	tests/test_abilities_registry.py::test_variable_ap_cost_x_exceeds_ap_raises

Bifrons tries X=5 but only has 3 AP. Should raise ValueError.

Preconditions

• P1 has 3 AP. Bifrons READIED.

Action

• execute_ability with choices={"x": 5}

Expected Postconditions

• ValueError raised (X exceeds available AP)