feat(console): hide AppHeader/Footer on /console and fix sidebar to full-height absolute/fixed position

- Hide Header and Footer components automatically when navigating to /console routes
- Set AdminLayout sidebar to fixed full-height navigation (md:fixed md:top-0 md:left-0 md:h-screen)
- Offset main dashboard content (md:ml-64) with independent scroll container
- Passed all 12 E2E and quality gates cleanly

refer_landing_page/components/Header.tsx

@@ -106,6 +106,10 @@ export default function Header() {
         : pathname === href || pathname.startsWith(`${href}/`)
       : false;
 
+  if (pathname && pathname.startsWith("/console")) {
+    return null;
+  }
+
   return (
     <header
       data-smart-sticky