feat: implement PlayerMovementController with support for movement states, multiplayer synchronization, and audio/UI systems

movement/player_movement_controller.gd

@@ -466,7 +466,16 @@ func rpc_take_damage(amount: float, hit_pos: Vector3, attacker_id: int, weapon_n
 		
 	# Show damage number for the attacker
 	if not multiplayer.has_multiplayer_peer() or attacker_id == multiplayer.get_unique_id():
-		spawn_damage_number(amount, hit_pos)
+		if is_multiplayer_authority():
+			spawn_damage_number(amount, hit_pos)
+		else:
+			var my_node = get_parent().get_node_or_null(str(attacker_id))
+			if my_node and my_node.has_method("spawn_damage_number"):
+				my_node.spawn_damage_number(amount, hit_pos)
+				
+	# Show damage indicator and screen shake for the victim
+	if is_multiplayer_authority() and amount > 0.0 and (not multiplayer.has_multiplayer_peer() or attacker_id != multiplayer.get_unique_id()):
+		_show_damage_indicator(hit_pos)
 	
 	if attacker_id != 0:
 		recent_attackers[attacker_id] = Time.get_ticks_msec() / 1000.0
@@ -488,7 +497,8 @@ func rpc_take_damage(amount: float, hit_pos: Vector3, attacker_id: int, weapon_n
 			die(impulse)
 			
 			if multiplayer.is_server():
-				if get_node_or_null("/root/NetworkManager") and multiplayer.has_multiplayer_peer():
+				var nm = get_node_or_null("/root/NetworkManager")
+				if nm and multiplayer.has_multiplayer_peer():
 					var victim_id = multiplayer.get_unique_id()
 					var killer_id = attacker_id
 					
@@ -498,7 +508,47 @@ func rpc_take_damage(amount: float, hit_pos: Vector3, attacker_id: int, weapon_n
 						if aid != killer_id and now - recent_attackers[aid] <= 10.0:
 							assist_ids.append(aid)
 					
-					get_node("/root/NetworkManager").register_kill.rpc(victim_id, killer_id, weapon_name, "", assist_ids)
+					if nm.has_method("register_kill"):
+						nm.register_kill.rpc(-1, killer_id, weapon_name, self.name, assist_ids)
+
+func _show_damage_indicator(hit_pos: Vector3) -> void:
+	if not _damage_layer: return
+	
+	var indicator = Polygon2D.new()
+	indicator.polygon = PackedVector2Array([
+		Vector2(0, -100),
+		Vector2(-20, -75),
+		Vector2(20, -75)
+	])
+	indicator.color = Color(1.0, 0.0, 0.0, 0.8)
+	indicator.position = get_viewport().get_visible_rect().size / 2.0
+	
+	var forward = -global_transform.basis.z
+	forward.y = 0.0
+	if forward.length_squared() > 0.01:
+		forward = forward.normalized()
+		var right = global_transform.basis.x
+		right.y = 0.0
+		right = right.normalized()
+		
+		var dir_to_hit = (hit_pos - global_position)
+		dir_to_hit.y = 0.0
+		if dir_to_hit.length_squared() > 0.01:
+			dir_to_hit = dir_to_hit.normalized()
+			var angle = atan2(dir_to_hit.dot(right), dir_to_hit.dot(forward))
+			indicator.rotation = angle
+			
+	_damage_layer.add_child(indicator)
+	var tween = create_tween()
+	tween.tween_property(indicator, "color:a", 0.0, 1.0)
+	tween.tween_callback(indicator.queue_free)
+	
+	if camera:
+		var shake_tween = create_tween()
+		shake_tween.tween_property(camera, "h_offset", randf_range(-0.2, 0.2), 0.05)
+		shake_tween.parallel().tween_property(camera, "v_offset", randf_range(-0.2, 0.2), 0.05)
+		shake_tween.chain().tween_property(camera, "h_offset", 0.0, 0.05)
+		shake_tween.parallel().tween_property(camera, "v_offset", 0.0, 0.05)
 
 func get_weapon_name() -> String:
 	if camera: