Add admin container restart controls

admin.js

@@ -25,6 +25,7 @@ const containerStatus = document.querySelector('#containerStatus');
 
 let config = null;
 let tokenSet = null;
+let opsRefreshTimer = null;
 
 function base64UrlEncode(buffer) {
   return btoa(String.fromCharCode(...new Uint8Array(buffer)))
@@ -353,11 +354,54 @@ function renderContainers(containers) {
     .sort((a, b) => important.indexOf(a.name) - important.indexOf(b.name));
 
   containerStatus.innerHTML = rows.map((container) => `
-    <div class="ops-line">
+    <div class="ops-line container-line" data-container="${container.name}">
       <strong>${container.name}</strong>
       <span>${container.status}</span>
+      <button class="ghost-button mini restart-container" type="button" ${container.restartable ? '' : 'disabled'}>
+        Neustarten
+      </button>
     </div>
   `).join('');
+
+  containerStatus.querySelectorAll('.restart-container').forEach((button) => {
+    button.addEventListener('click', () => restartContainer(button.closest('.container-line')));
+  });
+}
+
+async function restartContainer(row) {
+  const name = row?.dataset.container;
+  if (!name) return;
+
+  const confirmed = window.confirm(`${name} jetzt neu starten? Der Dienst ist kurz nicht erreichbar.`);
+  if (!confirmed) return;
+
+  const button = row.querySelector('.restart-container');
+  const status = row.querySelector('span');
+  const previousText = status.textContent;
+
+  button.disabled = true;
+  status.textContent = 'Neustart laeuft...';
+
+  try {
+    const response = await fetch(`/api/containers/${encodeURIComponent(name)}/restart`, {
+      method: 'POST',
+      headers: {
+        Authorization: `Bearer ${tokenSet.id_token}`
+      }
+    });
+    const payload = await response.json().catch(() => ({}));
+    if (!response.ok) throw new Error(payload.error || `HTTP ${response.status}`);
+
+    status.textContent = `Neugestartet um ${new Date(payload.restartedAt).toLocaleTimeString('de-DE')}`;
+    window.clearTimeout(opsRefreshTimer);
+    opsRefreshTimer = window.setTimeout(refreshOps, 3500);
+  } catch (error) {
+    status.textContent = `Neustart fehlgeschlagen: ${error.message}`;
+    button.disabled = false;
+    window.setTimeout(() => {
+      status.textContent = previousText;
+    }, 6000);
+  }
 }
 
 async function refreshOps() {