feat: Implement player input and movement managers for grid-based interaction and movement.

scripts/managers/player_input_manager.gd

@@ -102,7 +102,15 @@ func handle_unhandled_input(event):
 			KEY_Q:
 				if player.powerup_manager:
 					# Attack Mode (formerly Special)
+					# Now we want "Straight to Attack Mode" style
+					
 					player.powerup_manager.use_special_effect()
+					
+					# Force visual update / mutual exclusivity manually if powerup manager doesn't do it yet
+					if player.is_attack_mode and player.has_method("enter_attack_mode"):
+						# Re-triggering enter_attack_mode might be redundant but safely ensures visuals/Knock=False
+						player.enter_attack_mode()
+						
 			KEY_E:
 				if player.powerup_manager:
 					# Spawn Boost
@@ -117,7 +125,10 @@ func handle_unhandled_input(event):
 				else:
 					player.grab_tekton()
 			KEY_B:
-				player.knock_tekton()
+				if player.has_method("enter_knock_mode"):
+					player.enter_knock_mode()
+				else:
+					player.knock_tekton()
 	
 	# Handle spawn point selection if not yet selected