feat: area admin con editor tiptap, api crud e upload immagini

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

src/pages/admin/index.astro

@@ -0,0 +1,37 @@
+---
+import Admin from '../../layouts/Admin.astro';
+import { getDb } from '../../lib/db';
+import { listAllPosts } from '../../lib/posts';
+export const prerender = false;
+const posts = listAllPosts(getDb());
+const fmt = new Intl.DateTimeFormat('it-IT', { dateStyle: 'short', timeStyle: 'short' });
+---
+<Admin title="Articoli">
+  <h1>Articoli</h1>
+  <p><a class="abtn" href="/admin/new">+ Nuovo articolo</a></p>
+  <table>
+    <thead><tr><th>Titolo</th><th>Categoria</th><th>Stato</th><th>Aggiornato</th><th></th></tr></thead>
+    <tbody>
+      {posts.map((p) => (
+        <tr>
+          <td><a href={`/admin/edit/${p.id}`}>{p.title}</a></td>
+          <td>{p.category}</td>
+          <td><span class:list={['pill', { 'pill--draft': p.draft }]}>{p.draft ? 'Bozza' : 'Pubblicato'}</span></td>
+          <td>{fmt.format(new Date(p.updated_at.replace(' ', 'T') + 'Z'))}</td>
+          <td><button class="abtn abtn--danger" data-del={p.id}>Elimina</button></td>
+        </tr>
+      ))}
+    </tbody>
+  </table>
+  {posts.length === 0 && <p>Nessun articolo: creane uno nuovo.</p>}
+</Admin>
+
+<script>
+  document.querySelectorAll<HTMLButtonElement>('[data-del]').forEach((b) =>
+    b.addEventListener('click', async () => {
+      if (!confirm('Eliminare definitivamente questo articolo?')) return;
+      const res = await fetch(`/api/admin/posts/${b.dataset.del}`, { method: 'DELETE' });
+      if (res.ok) location.reload();
+      else alert('Eliminazione non riuscita.');
+    }));
+</script>