added standard-theme function

templates/admin.html

@@ -84,6 +84,10 @@
                    class="btn btn-sm btn-primary">
                   <i class="bi bi-pencil"></i> Bearbeiten
                 </a>
+                <button class="btn btn-sm btn-outline-success set-default-theme-btn"
+                        data-filename="{{ sb.filename }}">
+                  Als Standard setzen
+                </button>
               </td>
             </tr>
           {% endfor %}
@@ -252,5 +256,26 @@
       alert('Fehler: ' + e.message);
     }
   });
+
+  // Standard-Theme setzen
+  document.querySelectorAll('.set-default-theme-btn').forEach(btn => {
+    btn.addEventListener('click', async () => {
+      const filename = btn.dataset.filename;
+      try {
+        const res = await fetch('/admin/set_default_theme', {
+          method: 'POST',
+          headers: { 'Content-Type': 'application/json' },
+          body: JSON.stringify({ filename })
+        });
+        const text = await res.text();
+        let json;
+        try { json = JSON.parse(text); } catch (_) { throw new Error('Serverantwort ist kein JSON:\n'+text); }
+        if (!json.success) throw new Error(json.message || 'Fehler');
+        alert('Standard-Theme gesetzt: ' + filename);
+      } catch (e) {
+        alert('Fehler: ' + e.message);
+      }
+    });
+  });
 </script>
 {% endblock %}