fix(candy-survival): implement stagger (knockdown), lunge visual bump, and target stealing/backfire animations for Knock (Q)

scripts/managers/candy_survival_manager.gd

@@ -395,11 +395,21 @@ func try_knock(attacker: int, target: int) -> bool:
 	var target_colors = player_candy_colors.get(target, [])
 	var target_candies = target_colors.size()
 
+	var attacker_node = main_scene.get_node_or_null(str(attacker))
+	var target_node = main_scene.get_node_or_null(str(target))
+	
+	if attacker_node and target_node:
+		attacker_node.rpc("sync_bump", target_node.current_position)
+
 	if target_candies == 0:
 		# Backfire: both lose a charge
 		player_knocks[attacker] = player_knocks.get(attacker, 0) - 1
 		rpc("sync_knock_charge_count", attacker, player_knocks[attacker])
-		# Attacker is also knocked down briefly (visual handled by caller)
+		
+		# Attacker is also knocked down briefly (backfire)
+		if attacker_node:
+			attacker_node.rpc("apply_stagger", 2.0)
+			
 		rpc("sync_knock_result", attacker, target, 0)
 		return false
 
@@ -416,6 +426,10 @@ func try_knock(attacker: int, target: int) -> bool:
 	rpc("sync_knock_charge_count", attacker, player_knocks[attacker])
 	player_last_knocked_by[target] = attacker
 
+	# Target is knocked down / staggered on successful knock
+	if target_node:
+		target_node.rpc("apply_stagger", 2.0)
+
 	_add_score(attacker, target_candies * 100)
 	_update_candy_badge(attacker)
 	_update_candy_badge(target)

scripts/managers/player_input_manager.gd

@@ -119,22 +119,35 @@ func handle_unhandled_input(event):
 			if LobbyManager.game_mode == "Candy Survival":
 				var gm = player.get_node_or_null("/root/Main/CandySurvivalManager")
 				if gm and gm.active:
+					var att_id = player.get("peer_id") if "peer_id" in player else player.name.to_int()
+					if gm.player_knocks.get(att_id, 0) <= 0:
+						NotificationManager.send_message(player, "No Knock charges left!", NotificationManager.MessageType.WARNING)
+						get_viewport().set_input_as_handled()
+						return
+						
 					# Find a target to knock (first adjacent player)
 					var p_pos = player.current_position
 					var all_players = get_tree().get_nodes_in_group("Players")
+					var target_found = null
 					for other in all_players:
 						if other == player: continue
 						var other_pos = other.current_position
 						if abs(p_pos.x - other_pos.x) + abs(p_pos.y - other_pos.y) == 1:
-							# Adjacent
-							var att_id = player.get("peer_id") if "peer_id" in player else player.name.to_int()
-							var tgt_id = other.get("peer_id") if "peer_id" in other else other.name.to_int()
-							if multiplayer.is_server():
-								gm.try_knock(att_id, tgt_id)
-							else:
-								gm.rpc_id(1, "try_knock", att_id, tgt_id)
-							get_viewport().set_input_as_handled()
-							return
+							target_found = other
+							break
+							
+					if target_found:
+						var tgt_id = target_found.get("peer_id") if "peer_id" in target_found else target_found.name.to_int()
+						if multiplayer.is_server():
+							gm.try_knock(att_id, tgt_id)
+						else:
+							gm.rpc_id(1, "try_knock", att_id, tgt_id)
+					else:
+						# No target, but play the bump animation anyway in place
+						player.rpc("sync_bump", p_pos)
+						
+					get_viewport().set_input_as_handled()
+					return
 							
 			if player.powerup_manager:
 				player.powerup_manager.use_special_effect()