feat: Website-Projekte als Karten + Bearbeiten-Modal + Archiv-Filter

- Tabelle -> responsives Karten-Grid (kein Excel-Look), Typ-Badges
- Bearbeiten (Stift): Name, Subdomain, Typ (Preview/Oeffentliche Website/Internes Projekt)
  -> PATCH synct Git + Preview + Appwrite
- Repository im Bearbeiten-Modus archivieren/reaktivieren
- Dropdown-Filter Archiviert; archivierte Projekte standardmaessig ausgeblendet

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/lib/projectAdminApi.js

@@ -29,6 +29,21 @@ export async function syncGiteaRepos() {
   return adminFetch('/api/admin/gitea/sync-repos', { method: 'POST' })
 }
 
+export async function updateWebsiteProject(id, payload) {
+  return adminFetch(`/api/admin/website-projects/${id}`, {
+    method: 'PATCH',
+    body: JSON.stringify(payload),
+  })
+}
+
+export async function archiveWebsiteProject(id) {
+  return adminFetch(`/api/admin/website-projects/${id}/archive`, { method: 'POST' })
+}
+
+export async function unarchiveWebsiteProject(id) {
+  return adminFetch(`/api/admin/website-projects/${id}/unarchive`, { method: 'POST' })
+}
+
 export async function fetchProjectReadme(repoFullName) {
   if (!repoFullName) return { found: false }
   return adminFetch(