plan tab 좌측 objectNo 영역 추가

src/components/floor-plan/CanvasLayout.jsx

@@ -31,6 +31,7 @@ export default function CanvasLayout({ children }) {
   return (
     <div className="canvas-layout">
       <div className={`canvas-page-list ${['outline', 'surface', 'module'].includes(selectedMenu) ? 'active' : ''}`}>
+        <div className="canvas-id">{objectNo}</div>
         <div className="canvas-plane-wrap">
           {plans.map((plan, index) => (
             <button