Fix: added window existence check

Author: Akalanka47000

README.md

@@ -88,6 +88,7 @@ Run `bun i @mezh-hq/react-seat-toolkit` to incorporate into your project <br/>
 ```jsx
 import React from 'react';
 import SeatToolkit from '@mezh-hq/react-seat-toolkit';
+import '@mezh-hq/react-seat-toolkit/styles';
 
 const App = () => {
   const data = {
@@ -125,6 +126,7 @@ export default App;
 ```jsx
 import React from 'react';
 import SeatToolkit from '@mezh-hq/react-seat-toolkit';
+import '@mezh-hq/react-seat-toolkit/styles';
 
 const App = () => {
   return (

src/utils/workspace.ts

@@ -12,10 +12,12 @@ export const getWorkspaceHeight = () => {
 
 export const getWorkspaceCenterX = () => {
   const workspaceContainer = document.getElementById(ids.workspaceContainer);
+  if (typeof window === "undefined") return 0;
   return window.innerWidth / 2 - (workspaceContainer?.offsetLeft ?? 0) - 8;
 };
 
 export const getWorkspaceCenterY = () => {
   const workspaceContainer = document.getElementById(ids.workspaceContainer);
+  if (typeof window === "undefined") return 0;
   return window.innerHeight / 2 - (workspaceContainer?.offsetTop ?? 0);
 };