feat: implement special tiles manager for power-ups, including inventory, levels, cooldowns, and effect activation.

scripts/managers/special_tiles_manager.gd

@@ -94,7 +94,7 @@ var blocked_tiles: Array[Dictionary] = [] # {position: Vector3i, original_item:
 var freeze_zones: Array[Dictionary] = [] # {position: Vector2i, timer: float}
 var active_freeze_zones: Array = [] # Array of {center, radius, timer}
 var invisible_timer: float = 0.0
-
+var global_cooldown_timer: float = 0.0
 
 # INVENTORY SYSTEM
 # Stores count of each power-up type. Max 1 per type as per user request?
@@ -202,6 +202,11 @@ func activate_effect(effect: int, target_player: Node3D = null):
 		print("PowerUp %s not found in inventory or false. Inventory: %s" % [effect, inventory])
 		return
 		
+	# Check Cooldown
+	if global_cooldown_timer > 0:
+		NotificationManager.send_message(player, "Skill in Cooldown! (%.1fs)" % global_cooldown_timer, NotificationManager.MessageType.WARNING)
+		return
+		
 	# Check Attack Mode Restriction
 	if player.get("is_attack_mode") and effect == SpecialEffect.INVISIBLE_MODE:
 		NotificationManager.send_message(player, "Cannot enter Ghost mode while in Attack Mode!", NotificationManager.MessageType.WARNING)
@@ -213,7 +218,7 @@ func activate_effect(effect: int, target_player: Node3D = null):
 		return
 
 	var level = powerup_levels.get(effect, 1)
-	print("[SpecialTiles] Player %s activated %s (Lvl %d). No cooldown applied." % [player.name, SpecialEffect.keys()[effect], level])
+	print("[SpecialTiles] Player %s activated %s (Lvl %d)." % [player.name, SpecialEffect.keys()[effect], level])
 	
 	match effect:
 		SpecialEffect.FASTER_SPEED:
@@ -227,6 +232,9 @@ func activate_effect(effect: int, target_player: Node3D = null):
 		SpecialEffect.INVISIBLE_MODE:
 			_execute_invisible_mode(player)
 	
+	# Apply 5s cooldown globally
+	global_cooldown_timer = 5.0
+	
 	# Play generic cast animation or sound?
 	if player.is_multiplayer_authority() and multiplayer.has_multiplayer_peer() and multiplayer.multiplayer_peer.get_connection_status() == MultiplayerPeer.CONNECTION_CONNECTED:
 		player.rpc("trigger_screen_shake", "light")
@@ -541,6 +549,10 @@ func _check_for_icy_floor():
 		pass
 
 func _process(delta):
+	# Update Global Cooldown
+	if global_cooldown_timer > 0:
+		global_cooldown_timer -= delta
+		
 	# Update Active Buffs (Speed)
 	if active_buffs.has(SpecialEffect.FASTER_SPEED):
 		active_buffs[SpecialEffect.FASTER_SPEED] -= delta