Refresh private shop ad board on render

assets/root/uiprivateshopbuilder.py

@@ -94,24 +94,32 @@ class PrivateShopAdvertisementBoard(ui.ThinBoard):
 		net.SendOnClickPacket(self.vid)
 		
 		return True
-		
-	def OnUpdate(self):
+
+	def __UpdateProjectedPosition(self):
 		if not self.vid:
 			return
 
+		projectVID = None
 		if systemSetting.IsShowSalesText():
-			self.Show()
-			x, y = chr.GetProjectPosition(self.vid, 220)
-			self.SetPosition(x - self.GetWidth()/2, y - self.GetHeight()/2)
+			projectVID = self.vid
+		elif player.GetMainCharacterIndex() == self.vid:
+			projectVID = player.GetMainCharacterIndex()
+
+		if projectVID is None:
+			self.Hide()
+			return
+
+		self.Show()
+		x, y = chr.GetProjectPosition(projectVID, 220)
+		self.SetPosition(x - self.GetWidth()/2, y - self.GetHeight()/2)
 		
-		else:
-			for key in list(g_privateShopAdvertisementBoardDict.keys()):
-				if  player.GetMainCharacterIndex() == key:  # When the private shop is visible and closed, the player's own shop ID changes.
-					g_privateShopAdvertisementBoardDict[key].Show() 	
-					x, y = chr.GetProjectPosition(player.GetMainCharacterIndex(), 220)
-					g_privateShopAdvertisementBoardDict[key].SetPosition(x - self.GetWidth()/2, y - self.GetHeight()/2)
-				else:
-					g_privateShopAdvertisementBoardDict[key].Hide()
+	def OnUpdate(self):
+		self.__UpdateProjectedPosition()
+
+	def OnRender(self):
+		# Keep the board anchored to the interpolated render position instead
+		# of the legacy fixed update cadence.
+		self.__UpdateProjectedPosition()
 
 class PrivateShopBuilder(ui.ScriptWindow):