feat: introduce core player logic with manager integration and power-up inventory UI.

scripts/managers/player_input_manager.gd

@@ -95,24 +95,16 @@ func handle_unhandled_input(event):
 	if event is InputEventKey and event.pressed and not event.echo:
 		match event.keycode:
 			KEY_KP_1, KEY_1, KEY_KP_2, KEY_2, KEY_KP_3, KEY_3, KEY_KP_4, KEY_4:
-				var mode = LobbyManager.get_game_mode()
-				var is_restricted = GameMode.is_restricted(mode)
-				if is_restricted:
-					match event.keycode:
-						KEY_KP_1, KEY_1:
-							player.activate_powerup(0) # FASTER_SPEED
-						KEY_KP_2, KEY_2:
-							player.activate_powerup(3) # INVISIBLE_MODE (Ghost is now 2)
-				else:
-					match event.keycode:
-						KEY_KP_1, KEY_1:
-							player.activate_powerup(0) # FASTER_SPEED
-						KEY_KP_2, KEY_2:
-							player.activate_powerup(2) # BLOCK_FLOOR
-						KEY_KP_3, KEY_3:
-							player.activate_powerup(1) # AREA_FREEZE
-						KEY_KP_4, KEY_4:
-							player.activate_powerup(3) # INVISIBLE_MODE
+				# Unified Mapping for all modes: 1-Speed, 2-Wall, 3-Freeze, 4-Ghost
+				match event.keycode:
+					KEY_KP_1, KEY_1:
+						player.activate_powerup(0) # FASTER_SPEED
+					KEY_KP_2, KEY_2:
+						player.activate_powerup(2) # BLOCK_FLOOR
+					KEY_KP_3, KEY_3:
+						player.activate_powerup(1) # AREA_FREEZE
+					KEY_KP_4, KEY_4:
+						player.activate_powerup(3) # INVISIBLE_MODE
 			# KEY_R:
 			# 	player.auto_put_item()
 			KEY_Q: