feat(frontend): update navigation links and expand search coverage

- Hide 'Specification Examples' and 'API Docs' from sidebar documents group, pointing 'Use Docs' externally to pages.dev.
- Complete searchData array to cover all console business pages and missing admin-only pages.
- Add changelog records for these adjustments.

frontend/components/home/hero-section.tsx

@@ -72,7 +72,7 @@ export const HeroSection = React.memo(function HeroSection({ className }: HeroSe
                 </Button>
               </Link>
 
-              <Link href="/docs/how-to-use" className="w-full sm:w-auto">
+              <Link href="https://open-flare.pages.dev/" target="_blank" rel="noopener noreferrer" className="w-full sm:w-auto">
                 <Button
                   variant="secondary"
                   size="lg"