feat: add agent management

backend/app/frontend/static/app.css

@@ -1771,3 +1771,86 @@ button.map-position:hover {
         flex-direction: column;
     }
 }
+
+/* Agent Management v1 */
+
+.agent-summary-grid {
+    display: grid;
+    grid-template-columns: repeat(3, minmax(0, 1fr));
+    gap: 16px;
+    margin-bottom: 20px;
+}
+
+.agent-summary-card {
+    display: grid;
+    gap: 6px;
+}
+
+.agent-summary-card span {
+    font-size: 0.85rem;
+}
+
+.agent-summary-card strong {
+    font-size: 2rem;
+}
+
+.agent-management-columns {
+    display: grid;
+    gap: 20px;
+    margin-bottom: 20px;
+}
+
+.agent-table td:first-child {
+    display: grid;
+    gap: 4px;
+}
+
+.agent-create-form {
+    display: grid;
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+    gap: 16px;
+}
+
+.agent-create-form .agent-form-actions,
+.agent-create-form #agentCreateStatus {
+    grid-column: 1 / -1;
+}
+
+.agent-form-actions {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 10px;
+    align-items: center;
+}
+
+.agent-enrollment-result {
+    margin-top: 20px;
+    padding-top: 20px;
+    border-top: 1px solid var(--line);
+}
+
+.agent-token-box {
+    overflow-wrap: anywhere;
+    padding: 14px;
+    margin: 12px 0;
+    border: 1px solid var(--line);
+    border-radius: 8px;
+    background: var(--surface-muted);
+}
+
+.agent-token-box code {
+    user-select: all;
+}
+
+@media (max-width: 760px) {
+    .agent-summary-grid,
+    .agent-create-form {
+        grid-template-columns: 1fr;
+    }
+}
+
+/* Agent Management action visibility */
+.agent-management-columns .quiet-button,
+.agent-enrollment-panel .quiet-button {
+    color: var(--ink);
+}