Migrate CMS from Sanity to self-hosted Directus, add Impressum + Datenschutz

- Replace src/lib/sanity.ts with src/lib/directus.ts (REST API client)
- Update all 9 pages to use Directus field names and imageUrl()
- Add Impressum (§5 TMG) and Datenschutz (DSGVO) pages
- Update .env.example for Directus URL + token

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/pages/presse.astro

@@ -1,9 +1,8 @@
 ---
 import Layout from "../layouts/Layout.astro";
-import { getSettings } from "../lib/sanity";
+import { getSettings } from "../lib/directus";
 
 const settings = await getSettings();
-const contact = settings?.contact;
 ---
 
 <Layout title="Presse" description="Pressekontakt und Informationen zum Kitafreunde Regenbogen e.V., Förderverein der Integrationskita Regenbogen in Berlin-Tegel.">
@@ -14,12 +13,12 @@ const contact = settings?.contact;
     <div class="grid grid-cols-1 md:grid-cols-2 gap-12 mt-12">
       <div>
         <h2 class="text-xl font-bold mb-4">Pressekontakt</h2>
-        {contact?.email ? (
+        {settings?.contact_email ? (
           <div class="card">
             <p class="font-semibold mb-1">Kitafreunde Regenbogen e.V.</p>
             <p class="text-sm text-[var(--color-text-muted)] mb-3">Keilerstraße 23 · 13503 Berlin</p>
-            <a href={`mailto:${contact.email}?subject=Presseanfrage`} class="text-[var(--color-primary)] font-medium">
-              {contact.email}
+            <a href={`mailto:${settings.contact_email}?subject=Presseanfrage`} class="text-[var(--color-primary)] font-medium">
+              {settings.contact_email}
             </a>
           </div>
         ) : (