feat: Introduce special tile power-up system, managing inventory, levels, cooldowns, and targeted effects like area freeze and block floor.

scripts/managers/special_tiles_manager.gd

@@ -380,6 +380,11 @@ func _execute_block_floor(target_pos: Vector2i):
 	
 	for n in neighbors:
 		var pos = n.position
+		
+		# PHYSICS CHECK
+		if _is_position_blocked_by_stand(pos):
+			continue
+			
 		var block_pos = Vector3i(pos.x, 0, pos.y)
 		
 		# Check current item first
@@ -437,6 +442,10 @@ func spawn_powerups_around(center: Vector2i, force_powerups: bool = true):
 	for x in range(-radius, radius + 1):
 		for y in range(-radius, radius + 1):
 			var pos = center + Vector2i(x, y)
+			
+			if _is_position_blocked_by_stand(pos):
+				continue
+				
 			if enhanced_gridmap.is_position_valid(pos):
 				# Random chance to spawn ANYTHING at this spot (keep density reasonable)
 				if rng.randf() > 0.5: continue
@@ -640,4 +649,24 @@ func _create_unfreeze_timer(target_player: Node3D, duration: float):
 		# Reset visuals
 		if target_player.has_method("sync_modulate"):
 			target_player.rpc("sync_modulate", Color.WHITE)
-		NotificationManager.send_message(target_player, NotificationManager.MESSAGES.UNFROZEN, NotificationManager.MessageType.NORMAL)
+		NotificationManager.send_message(target_player, "You are no longer frozen!", NotificationManager.MessageType.NORMAL)
+
+func _is_position_blocked_by_stand(target_pos: Vector2i) -> bool:
+	if not player: return false
+	
+	# Raycast check for Static Tekton Stand
+	# Check CENTER of tile (x+0.5) at LOW height (0.3)
+	var from = Vector3(target_pos.x + 0.5, 0.3, target_pos.y + 0.5) + Vector3.UP * 2.0
+	var to = Vector3(target_pos.x + 0.5, 0.3, target_pos.y + 0.5) + Vector3.DOWN * 2.0
+	
+	var query = PhysicsRayQueryParameters3D.create(from, to)
+	query.collide_with_areas = false
+	query.collide_with_bodies = true
+	
+	var space_state = player.get_world_3d().direct_space_state
+	var result = space_state.intersect_ray(query)
+	
+	if result:
+		if result.collider != player:
+			return true
+	return false