feat: Implement core player character logic and input handling, including movement, actions, and manager integration.

scenes/player.gd

@@ -828,6 +828,34 @@ func attempt_target_action(target_index: int):
 		st_manager.activate_effect(effect, target_player)
 		inventory_ui.deselect()
 
+func activate_powerup(effect_id: int):
+	var main = get_tree().get_root().get_node_or_null("Main")
+	if not main or not main.ui_manager:
+		return
+		
+	# Try to find the UI button directly if possible, or simulate the click
+	# The goal is to Select it (if it requires targeting) OR Activate it (if instant)
+	
+	# Since PowerUpInventoryUI manages selection state, we should route through it if possible
+	# or directly tell SpecialTilesManager to prepare?
+	
+	# Let's try to mimic the button press
+	var inventory_ui = main.ui_manager.get_node_or_null("PowerUpInventoryUI") # Or wherever it lives
+	if not inventory_ui:
+		# Fallback: Find it in scene
+		inventory_ui = main.get_node_or_null("PowerUpInventoryUI")
+		
+	if inventory_ui:
+		# Inventory UI handles: "activate_effect(effect_id)" on click
+		# Which then calls SpecialTilesManager.activate_effect
+		# This handles both "Instant" effects (Speed) and "Targeting" effects (Wall)
+		inventory_ui._on_btn_pressed(effect_id)
+	else:
+		# Fallback if UI not found
+		var st_manager = get_node_or_null("SpecialTilesManager")
+		if st_manager:
+			st_manager.activate_effect(effect_id)
+
 
 func _process(delta):
 	if is_multiplayer_authority():