show version number on top

src/components/Layout.tsx

@@ -1,4 +1,5 @@
 import React from 'react';
+import { APP_VERSION } from '../version';
 
 interface LayoutProps {
   children: React.ReactNode;
@@ -8,17 +9,24 @@ const Layout: React.FC<LayoutProps> = ({ children }) => {
   return (
     <div className="app-root">
       <header className="app-header">
-        <div className="app-header-title">
-          <span className="app-logo">📄</span>
-          <div>
-            <h1>PDF Workbench</h1>
-            <small>All in your browser</small>
+        <div className="app-header-content">
+          <div className="app-header-title">
+            <span className="app-logo">📄</span>
+            <div>
+              <h1>PDF Workbench</h1>
+              <small>All in your browser</small>
+            </div>
+          </div>
+
+          <div className="app-version" title={`Version ${APP_VERSION}`}>
+            v{APP_VERSION}
           </div>
         </div>
       </header>
+
       <main className="app-main">{children}</main>
     </div>
   );
 };
 
-export default Layout;
+export default Layout;