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/about/page.tsx

@@ -7,12 +7,14 @@ import { WhyUs } from '@/components/robotics/WhyUs';
 import { FloatingTechPanel } from '@/components/robotics/FloatingTechPanel';
 import { CompanyStory } from '@/components/robotics/CompanyStory';
 import { FounderSection } from '@/components/robotics/FounderSection';
+import { pageMetadata } from '@/lib/seo';
 
-export const metadata: Metadata = {
-  title: 'About YS Lootah Robotics UAE Destination for Unitree & Pudu Robotics',
+export const metadata: Metadata = pageMetadata({
+  title: 'About Us · UAE Destination for Unitree & Pudu Robotics',
   description:
     'YS Lootah Robotics is part of the Yousuf Saeed Lootah Investment Group a trusted UAE robotics partner delivering AI, automation, and intelligent robotics across Dubai and the UAE.',
-};
+  path: '/about/',
+});
 
 export default function AboutPage() {
   return (