feat: Establish initial game structure including lobby, UI, and core gameplay managers.

scenes/player.gd

@@ -22,12 +22,25 @@ var original_movement_range: int = 1
 
 var is_attack_mode: bool = false:
 	set(value):
+		if is_attack_mode == value:
+			return # Prevent infinite recursion / redundant updates
+			
 		is_attack_mode = value
 		# Visual feedback for attack mode (Red Tint)
 		if is_attack_mode:
 			_apply_tint_recursive(self, Color(1.0, 0.5, 0.5))
 		else:
 			_apply_tint_recursive(self, Color.WHITE)
+			
+		# Sync to others if we are the authority
+		if is_multiplayer_authority():
+			rpc("sync_attack_mode", is_attack_mode)
+
+@rpc("any_peer", "call_local", "reliable")
+func sync_attack_mode(state: bool):
+	# We WANT to trigger the setter to apply visuals on clients
+	# Using self.var triggers setter in GDScript
+	self.is_attack_mode = state
 
 @export var is_bot: bool = false