fix(push-admin): show test push delivery errors

push-server/apps/admin/pages/instances/[id].vue

@@ -82,14 +82,14 @@ async function sendTestPush() {
     });
     await Promise.all([refreshInstance(), refreshJobs(), refreshDevices()]);
     toast.add({
-      title: "Test-Push gesendet",
-      description: `${result.sent ?? 0} gesendet, ${result.failed ?? 0} fehlgeschlagen`,
-      color: result.failed ? "warning" : "success",
+      title: result.failed ? (result.sent ? "Test-Push teilweise fehlgeschlagen" : "Test-Push fehlgeschlagen") : "Test-Push gesendet",
+      description: [`${result.sent ?? 0} gesendet, ${result.failed ?? 0} fehlgeschlagen`, result.lastErrorCode, result.lastErrorMessage].filter(Boolean).join(" · "),
+      color: result.failed ? (result.sent ? "warning" : "error") : "success",
     });
   } catch (error: any) {
     toast.add({
       title: "Test-Push fehlgeschlagen",
-      description: error?.data?.message || error?.message || "Die Testnachricht konnte nicht gesendet werden.",
+      description: error?.data?.message || error?.data?.error || error?.message || "Die Testnachricht konnte nicht gesendet werden.",
       color: "error",
     });
   } finally {
@@ -246,6 +246,7 @@ async function sendTestPush() {
                   <th>Angenommen</th>
                   <th>Gesendet</th>
                   <th>Fehler</th>
+                  <th>Letzter Fehler</th>
                   <th>Erstellt</th>
                 </tr>
               </thead>
@@ -256,6 +257,10 @@ async function sendTestPush() {
                   <td>{{ job.acceptedCount }}</td>
                   <td>{{ job.sentCount }}</td>
                   <td>{{ job.failedCount }}</td>
+                  <td>
+                    <div>{{ job.lastErrorCode || "-" }}</div>
+                    <div v-if="job.lastErrorMessage" class="text-sm text-gray-500">{{ job.lastErrorMessage }}</div>
+                  </td>
                   <td>{{ new Date(job.createdAt).toLocaleString() }}</td>
                 </tr>
               </tbody>