feat(victory): ✨ Add unit-capture victory condition logic to handle new win scenarios in VictoryManager.gd

Co-Authored-By: Lilith Autocommit <noreply@atlilith.com>

src/game/engine/src/modules/victory/victory_manager.gd

@@ -10,6 +10,7 @@ extends RefCounted
 ## Called by TurnManager.next_player() after all players have moved.
 
 const PlayerScript: GDScript = preload("res://engine/src/entities/player.gd")
+const UnitScript: GDScript = preload("res://engine/src/entities/unit.gd")
 
 var _game_over: bool = false
 
@@ -28,6 +29,11 @@ func check_all(_game_map: RefCounted) -> void:
 
 
 ## Domination: the last player with at least one city wins.
+##
+## A player without cities is still considered alive while they hold any
+## founder unit, since they can still settle. This prevents the check from
+## firing on the very first turn that one side founds before the other has
+## had a chance — a "haven't finished setting up" state, not a real victory.
 func _check_domination() -> int:
 	var alive_players: Array[int] = []
 	for player: Variant in GameState.players:
@@ -35,12 +41,22 @@ func _check_domination() -> int:
 			continue
 		if player.cities.size() > 0:
 			alive_players.append(player.index)
+			continue
+		if _has_living_founder(player):
+			alive_players.append(player.index)
 
 	if alive_players.size() == 1:
 		return alive_players[0]
 	return -1
 
 
+func _has_living_founder(player: RefCounted) -> bool:
+	for unit: Variant in player.units:
+		if unit is UnitScript and unit.is_alive() and unit.can_found_city:
+			return true
+	return false
+
+
 ## Calculate a simple score for a player (used by victory/defeat screens).
 ## Points: 1 per population, 5 per city, 3 per tech, 2 per unit alive.
 func calculate_score(player: RefCounted, _game_map: RefCounted) -> int: