fix: Hide main nav menu in invoice print

- Added data-mainmenu attribute to TopNavBar component
- Added #woonoow-admin-app [data-mainmenu] to print CSS hide rules
- Now hides: header, nav, mainmenu, submenubar, bottomnav

admin-spa/src/App.tsx

@@ -198,7 +198,7 @@ function TopNav({ fullscreen = false }: { fullscreen?: boolean }) {
   const navTree = (window as any).WNW_NAV_TREE || [];
 
   return (
-    <div className={`border-b border-border sticky ${topClass} z-30 bg-background md:bg-background/95 md:backdrop-blur md:supports-[backdrop-filter]:bg-background/60`}>
+    <div data-mainmenu className={`border-b border-border sticky ${topClass} z-30 bg-background md:bg-background/95 md:backdrop-blur md:supports-[backdrop-filter]:bg-background/60`}>
       <div className="px-4 h-12 flex flex-nowrap overflow-auto items-center gap-2">
         {navTree.map((item: any) => {
           const IconComponent = iconMap[item.icon] || Package;

admin-spa/src/index.css

@@ -163,6 +163,7 @@
   /* Hide WooNooW app shell - all nav, header, submenu elements */
   #woonoow-admin-app header,
   #woonoow-admin-app nav,
+  #woonoow-admin-app [data-mainmenu],
   #woonoow-admin-app [data-submenubar],
   #woonoow-admin-app [data-bottomnav],
   .woonoow-app-header,