feat(faqs): wire FaqPage component and reformat faqs.mdx content

PageLayout now imports FaqPage and routes the faqs slug through it,
passing the page content as a slot (accordion and search are handled by
the component). Also passes subtitle="FAQs" to PageHero for the split
title/subtitle hero treatment.

faqs.mdx is cleaned up to match what FaqPage.astro expects as input:
- removes the old Button import and the duplicate h2 headings that are
  now rendered by the component itself
- reformats all answers from loose markdown text to explicit HTML
  elements (p, ul, ol, h4, h5) so the accordion parser receives
  well-formed nodes rather than flat text runs

www/src/layouts/PageLayout.astro

@@ -5,6 +5,7 @@ import TeamPage from '../components/TeamPage.astro';
 import AboutPage from '../components/AboutPage.astro';
 import ServicesPage from '../components/ServicesPage.astro';
 import CareersPage from '../components/CareersPage.astro';
+import FaqPage from '../components/FaqPage.astro';
 import PageHero from '../components/PageHero.astro';
 import { pageHeroImages } from '../data/page-visuals';
 const { entry } = Astro.props;
@@ -52,7 +53,7 @@ const isService = Boolean(serviceTitles[entry.data.lang]?.[entry.data.slug]);
 const heroImage = pageHeroImages[entry.data.slug];
 ---
 <BaseLayout title={entry.data.title} description={entry.data.description} canonical={entry.data.canonical} image={entry.data.featuredImage || heroImage} lang={entry.data.lang}>
-  <PageHero title={bannerTitle} image={heroImage} constrain />
+  <PageHero title={bannerTitle} subtitle={entry.data.slug === 'faqs' ? 'FAQs' : undefined} image={heroImage} constrain />
   {entry.data.slug === 'team' && entry.data.lang === 'en'
     ? <TeamPage />
     : entry.data.slug === 'about' && entry.data.lang === 'en'
@@ -61,6 +62,8 @@ const heroImage = pageHeroImages[entry.data.slug];
     ? <ServicesPage />
     : entry.data.slug === 'careers' && entry.data.lang === 'en'
     ? <CareersPage />
+    : entry.data.slug === 'faqs' && entry.data.lang === 'en'
+    ? <FaqPage><slot /></FaqPage>
     : <article class:list={['prose', 'source-page', 'container', { 'service-page': isService }]}><slot /></article>}
   {showForm && <FormShell title={bannerTitle} showBackground={entry.data.slug === 'client-consultation'} />}
 </BaseLayout>