✅ Advance contract to main

Category	Ability
Status	Passing
Test	tests/test_turn_sequence.py::test_advance_contract_to_main

advance_phase from CONTRACT → MAIN for the first player.

Preconditions

• phase = Phase.CONTRACT.

• main_phase_order = [Side.PLAYER_1, Side.PLAYER_2].

Action

• advance_phase(state)

Expected Postconditions

• phase = Phase.MAIN.

• current_player = Side.PLAYER_1.

Assertions

assert result.phase == Phase.MAIN
assert result.current_player == Side.PLAYER_1