feat(mvp): complete M13 clean-up milestone (real usernames, avatar studio redesign, pause menu, audio manager)

scripts/player_spawner.gd

@@ -25,6 +25,9 @@ var last_applied_seq: int = 0
 ## Replicated avatar loadout (base_body, slots, skin_tone).
 var loadout: Dictionary = {}
 
+var username: String = ""
+var user_id: int = 0
+
 ## Queue of {seq:int, move_x:float, move_z:float, jump:bool, look_yaw:float}
 ## appended by rpc_request_input, drained each physics frame.
 var _input_queue: Array[Dictionary] = []
@@ -80,6 +83,8 @@ func get_server_state() -> Dictionary:
 		"velocity": velocity,
 		"on_floor": is_on_floor(),
 		"loadout": loadout,
+		"username": username,
+		"user_id": user_id,
 	}
 
 
@@ -95,3 +100,7 @@ func rpc_set_loadout(p_loadout: Dictionary) -> void:
 	var sender := multiplayer.get_remote_sender_id()
 	if sender == peer_id or sender == 1 or sender == 0:
 		loadout = p_loadout.duplicate(true)
+		if p_loadout.has("username") and p_loadout["username"] is String:
+			username = p_loadout["username"]
+		if p_loadout.has("user_id"):
+			user_id = int(p_loadout["user_id"])