feat: implement initial lobby scene with main menu, server browser, and networking options.

scenes/player.gd

@@ -1186,13 +1186,15 @@ func find_valid_starting_position() -> Vector2i:
 	if is_bot:
 		return _find_random_spawn_position()
 	else:
-		# Auto-assign the first available spawn point for fixed spawning
-		for spawn_pos in spawn_locations:
-			if not is_position_occupied(spawn_pos):
-				return spawn_pos
+		# For Stop n Go, use Column 0
+		if LobbyManager.game_mode == "Stop n Go":
+			for spawn_pos in spawn_locations:
+				if not is_position_occupied(spawn_pos):
+					return spawn_pos
 		
-		# Fallback (should typically not be reached if spawn_locations > max_players)
-		return Vector2i(0, 0)
+		# For Freemode, try corners if random spawn is OFF, or just find any walkable
+		# But wait, host will assign most of the time. This is just for initial _ready.
+		return Vector2i(1, 1) # Default away from the very edge if possible
 
 # highlight_available_spawn_points is no longer needed for manual selection in this mode
 func highlight_available_spawn_points():