feat(ui): add publish readiness indicators and WP env key aliases

backend/templates/admin_dashboard.html

@@ -163,6 +163,10 @@
             <td><span class="badge">{{ a.status }}</span></td>
             <td>
               <div class="subtle">Legal: {{ "OK" if a.legal_checked else "offen" }}</div>
+              <div class="subtle">Publish: {{ "bereit" if a.publish_ready else "blockiert" }}</div>
+              {% if not a.publish_ready and a.publish_blockers %}
+              <div class="subtle">{{ a.publish_blockers|join(", ") }}</div>
+              {% endif %}
               {% if a.selected_image_url %}
               <div class="subtle">Hauptbild gesetzt</div>
               <a href="{{ a.selected_image_url }}" target="_blank" rel="noopener"><img src="{{ a.selected_image_proxy_url }}" data-fallback-src="{{ a.selected_image_url }}" alt="Hauptbild" class="thumb" loading="lazy" onerror="if(!this.dataset.fallbackUsed){this.dataset.fallbackUsed='1';this.src=this.dataset.fallbackSrc;}else{this.classList.add('img-failed');}" /></a>