feat: show full supported-platforms block on each downloader page

Replace the plain "looking for another platform?" text link at the
bottom of each per-platform page with the same SupportedPlatformsSection
used on the homepage, giving stronger internal linking between all
platform pages. Drop the now-unused otherPlatforms/browseAll strings.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/app/[locale]/[slug]/page.tsx

@@ -2,11 +2,11 @@ import type { Metadata } from 'next'
 import { notFound } from 'next/navigation'
 import { getTranslations } from 'next-intl/server'
 import { routing } from '@/i18n/routing'
-import { Link } from '@/navigation'
 import { getDownloaderPlatformBySlug } from '@/lib/downloader-platforms'
 import { SubmitForm } from '@/components/SubmitForm'
 import { ReassuranceSection } from '@/components/ReassuranceSection'
 import { HowItWorksSection } from '@/components/HowItWorksSection'
+import { SupportedPlatformsSection } from '@/components/SupportedPlatformsSection'
 import { FaqAccordion } from '@/components/FaqAccordion'
 
 export async function generateMetadata({
@@ -108,14 +108,7 @@ export default async function DownloaderPage({
         </div>
       </section>
 
-      <section className="pb-16 px-6 text-center">
-        <p className="text-sm text-gray-500 dark:text-gray-400">
-          {t('otherPlatforms')}{' '}
-          <Link href="/supported-sites" className="text-violet-600 dark:text-violet-400 hover:underline">
-            {t('browseAll')}
-          </Link>
-        </p>
-      </section>
+      <SupportedPlatformsSection locale={locale} />
     </main>
   )
 }