fix(homepage): move section rendering into the Astro template

- keep homepage section data driven from structured frontmatter
- render typed section components inside the template map instead of frontmatter helper code
- resolve the Astro parse error in HomePage.astro
- preserve the existing homepage section order and component split

www/src/components/HomePage.astro

@@ -38,8 +38,9 @@ function fromHomeContent(home: HomePageContent): HomeSection[] {
 const sections: HomeSection[] = entry.data.home
   ? fromHomeContent(entry.data.home)
   : ((entry.data.sections ?? []) as HomeSection[]);
-
-function renderSection(section: HomeSection) {
+---
+<BaseLayout {title} {description} {canonical} {lang}>
+  {sections.map((section) => {
     switch (section.type) {
       case 'hero':
         return <HomeHero section={section} />;
@@ -61,11 +62,8 @@ function renderSection(section: HomeSection) {
         return <HomeDirector section={section} />;
       case 'testimonials':
         return <HomeTestimonials section={section} />;
-  }
-
+      default:
         return null;
     }
----
-<BaseLayout {title} {description} {canonical} {lang}>
-  {sections.map(renderSection)}
+  })}
 </BaseLayout>