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/kontakt.astro

@@ -1,10 +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;
-const social = settings?.social;
 ---
 
 <Layout title="Kontakt" description="Kontakt zum Kitafreunde Regenbogen e.V. — schreib uns, werde Mitglied oder bring eine Idee ein.">
@@ -23,11 +21,11 @@ const social = settings?.social;
             13503 Berlin
           </p>
         </div>
-        {contact?.email && (
+        {settings?.contact_email && (
           <div class="card">
             <h3 class="font-bold mb-2 text-sm uppercase tracking-wide text-[var(--color-text-muted)]">E-Mail</h3>
-            <a href={`mailto:${contact.email}`} class="text-[var(--color-primary)] font-medium text-lg">
-              {contact.email}
+            <a href={`mailto:${settings.contact_email}`} class="text-[var(--color-primary)] font-medium text-lg">
+              {settings.contact_email}
             </a>
           </div>
         )}
@@ -38,15 +36,15 @@ const social = settings?.social;
           </p>
           <a href="/mitglied-werden" class="btn-primary text-sm">Zur Mitgliedschaftsseite →</a>
         </div>
-        {(social?.instagram || social?.facebook) && (
+        {(settings?.social_instagram || settings?.social_facebook) && (
           <div class="card">
             <h3 class="font-bold mb-3">Social Media</h3>
             <div class="flex gap-3">
-              {social.instagram && (
-                <a href={social.instagram} target="_blank" rel="noopener" class="btn-secondary text-sm">Instagram</a>
+              {settings.social_instagram && (
+                <a href={`https://instagram.com/${settings.social_instagram}`} target="_blank" rel="noopener" class="btn-secondary text-sm">Instagram</a>
               )}
-              {social.facebook && (
-                <a href={social.facebook} target="_blank" rel="noopener" class="btn-secondary text-sm">Facebook</a>
+              {settings.social_facebook && (
+                <a href={settings.social_facebook} target="_blank" rel="noopener" class="btn-secondary text-sm">Facebook</a>
               )}
             </div>
           </div>
@@ -60,7 +58,7 @@ const social = settings?.social;
           Dieses Formular öffnet deinen E-Mail-Client.
         </p>
         <form
-          action={`mailto:${contact?.email ?? "info@kitafreunde-regenbogen.de"}`}
+          action={`mailto:${settings?.contact_email ?? "info@kitafreunde-regenbogen.de"}`}
           method="get"
           enctype="text/plain"
           class="space-y-4"