feat: implement Stop N Go arena, animation system, and lobby manager features

scripts/managers/lobby_manager.gd

@@ -64,7 +64,7 @@ var disconnect_reason: String = ""
 # Stop N Go settings
 var sng_go_duration: int = 20
 var sng_stop_duration: int = 4
-var sng_required_goals: int = 8
+var sng_required_goals: int = 1
 
 # Tekton Doors settings
 var doors_swap_time: int = 15

scripts/managers/powerup_manager.gd

@@ -191,6 +191,12 @@ func spawn_boost_reward() -> bool:
 		return false
 		
 	if player.special_tiles_manager and player.special_tiles_manager.has_method("spawn_powerups_around"):
+		# Trigger the synced floor spawn animation
+		if player.has_method("rpc"):
+			player.rpc("sync_floor_spawn_animation")
+		elif player.has_method("play_floor_spawn"):
+			player.play_floor_spawn()
+
 		# Spawn tiles (Stop N Go gets only common, Free Mode gets 60/40 ratio)
 		player.special_tiles_manager.spawn_powerups_around(player.current_position, true, false, true)
 		

scripts/managers/stop_n_go_manager.gd

@@ -145,6 +145,13 @@ func _update_hud_visuals():
 				var player_node = main.get_node_or_null(str(my_id))
 				if player_node:
 					NotificationManager.send_message(player_node, "ALL GOALS COMPLETE!", NotificationManager.MessageType.GOAL)
+					
+					# Play looping "GoFinish" animation to signals the Go phase for this player
+					if main and main.get("vfx_manager"):
+						if main.vfx_manager.has_method("play_go_finish_animation"):
+							main.vfx_manager.play_go_finish_animation()
+						elif main.vfx_manager.has_method("play_go_animation"):
+							main.vfx_manager.play_go_animation()
 		else:
 			mission_label.add_theme_color_override("font_color", Color.WHITE)
 			_has_notified_mission_complete = false