feat(seo): fix titles, canonicals, share tags and soft 404s

- Titles carried the brand twice (page title plus layout template) and Pudu
  items read "Pudu PUDU". Pages now go through pageMetadata() and displayName().
- /configure, /privacy-policy and /terms-of-service reused the homepage title.
- Eight pages had no canonical and inherited the homepage og:url.
- Unknown /robots, /accessories and /industries slugs returned 200; they are
  now a real 404 (dynamicParams = false) with a not-found page.
- Events, Smart Buildings and Government have no page content yet and rendered
  not-found: moved to UPCOMING_INDUSTRIES until it is written.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/app/contact/page.tsx

@@ -2,12 +2,14 @@ import type { Metadata } from 'next';
 import { Navbar } from '@/components/Navbar';
 import { FooterAndContact } from '@/components/FooterAndContact';
 import { InquiryForm } from '@/components/robotics/InquiryForm';
+import { pageMetadata } from '@/lib/seo';
 
-export const metadata: Metadata = {
-  title: 'Contact YS Lootah Robotics Dubai Robotics Sales & Demo Inquiries',
+export const metadata: Metadata = pageMetadata({
+  title: 'Contact · Dubai Robotics Sales & Demo Inquiries',
   description:
     'Dubai robotics sales, support, and demo inquiries. Contact YS Lootah Robotics, the UAE destination for selected Unitree and Pudu Robotics solutions, by phone, email, or WhatsApp.',
-};
+  path: '/contact/',
+});
 
 export default function ContactPage() {
   return (