- State.new and Battle.start now default the initial active battler slot to the first usable (non-egg, HP > 0) Pokémon in the party instead of unconditionally selecting slot 1.
- In double battles, slots 0 and 2 correctly select the first and second conscious Pokémon.
- Add regression test in tests/game3_battle_fainted_lead_test.lua verifying single, double, and party-order behavior when the lead slot is fainted.
bryanthaboi