feat(nodes): per-node default domain with auto service hostnames (#65)

node_agents.default_domain gives each agent a base domain. Services
placed on it (explicit pin or spread) with no explicit service_domains
get <name>.<default_domain> — resolved in serviceDomainNames so edge
routing, wake placeholders, and public_url all see the same names.
Spread services union every eligible node's base domain; explicit
domains always win.

Surfaces: PUT /agents/:id {default_domain} (hostname-validated), CLI
nodes update --domain, MCP arg docs, OpenAPI + regenerated types,
node-detail inline editor.

Also marks the already-shipped backup-import roadmap item.

Generated with [Devin](https://devin.ai)

Co-authored-by: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

app/frontend/src/features/nodes/NodeDetailPage.tsx

@@ -48,6 +48,7 @@ export function NodeDetailPage() {
   const [confirmVolumes, setConfirmVolumes] = useState(false);
   const [confirmDrain, setConfirmDrain] = useState(false);
   const [tagDraft, setTagDraft] = useState<string | null>(null);
+  const [domainDraft, setDomainDraft] = useState<string | null>(null);
 
   const agentQuery = useQuery({
     queryKey: ['node-agent', id],
@@ -80,8 +81,8 @@ export function NodeDetailPage() {
     queryClient.invalidateQueries({ queryKey: ['usage-agents'] });
   };
   const updateMutation = useMutation({
-    mutationFn: (body: { name?: string; auto_prune?: boolean; tags?: string[] }) => updateAgent(id, body),
-    onSuccess: () => { setRename(null); setTagDraft(null); invalidate(); },
+    mutationFn: (body: { name?: string; auto_prune?: boolean; tags?: string[]; default_domain?: string }) => updateAgent(id, body),
+    onSuccess: () => { setRename(null); setTagDraft(null); setDomainDraft(null); invalidate(); },
   });
   const pruneMutation = useMutation({
     mutationFn: (volumes: boolean) => pruneAgent(id, { volumes }),
@@ -218,6 +219,44 @@ export function NodeDetailPage() {
                   </>
                 )}
               </p>
+              <p className="v-mono mt-1 text-[11px] text-[var(--text-tertiary)] flex items-center gap-1.5 flex-wrap">
+                domain:
+                {domainDraft === null ? (
+                  <>
+                    <span className={agent.defaultDomain ? 'text-[var(--text-secondary)]' : 'text-[var(--text-muted)]'}>
+                      {agent.defaultDomain || 'none'}
+                    </span>
+                    {isAdmin && (
+                      <button
+                        onClick={() => setDomainDraft(agent.defaultDomain || '')}
+                        className="text-[var(--text-muted)] hover:text-[var(--text-primary)]"
+                        title="Node base domain — domainless services placed here get <name>.<domain> hostnames"
+                      >
+                        <Pencil size={11} />
+                      </button>
+                    )}
+                  </>
+                ) : (
+                  <>
+                    <input
+                      value={domainDraft}
+                      onChange={(e) => setDomainDraft(e.target.value)}
+                      onKeyDown={(e) => {
+                        if (e.key === 'Enter') updateMutation.mutate({ default_domain: domainDraft.trim().toLowerCase() });
+                        if (e.key === 'Escape') setDomainDraft(null);
+                      }}
+                      autoFocus
+                      placeholder="apps.node1.example.com — empty clears"
+                      className="rounded-md border border-[var(--border-subtle)] bg-[var(--bg-tertiary)] px-2 py-0.5 text-[11px] text-[var(--text-primary)] w-64"
+                    />
+                    <button
+                      onClick={() => updateMutation.mutate({ default_domain: domainDraft.trim().toLowerCase() })}
+                      className="text-[var(--accent-primary)] hover:underline"
+                    >save</button>
+                    <button onClick={() => setDomainDraft(null)} className="text-[var(--text-muted)] hover:underline">cancel</button>
+                  </>
+                )}
+              </p>
             </div>
             <div className="flex items-center gap-3">
               <span className={`v-mono text-[11px] px-2 py-1 rounded-md border ${online

app/frontend/src/generated/api-types.ts

@@ -8179,7 +8179,7 @@ export interface paths {
         };
         /**
          * Update node agent
-         * @description Partial update — accepts any subset of agent fields (name, status, auto_prune, tags). `tags` sets the node's placement labels; services with placement_tags only schedule onto agents carrying every required tag.
+         * @description Partial update — accepts any subset of agent fields (name, status, auto_prune, tags, default_domain). `tags` sets the node's placement labels; services with placement_tags only schedule onto agents carrying every required tag. `default_domain` gives the node a base domain — domainless services placed there get `<name>.<default_domain>` auto-hostnames; empty string clears it.
          */
         put: {
             parameters: {
@@ -12297,6 +12297,8 @@ export interface components {
             schedulable?: boolean;
             /** @description Operator-set placement labels; services with placement_tags require all of them on the target node. */
             tags?: string[];
+            /** @description Node base domain — services placed on this node (pin or spread) with no explicit service_domains get `<name>.<default_domain>` hostnames automatically. Wildcard DNS for `*.<default_domain>` must resolve to the Containr edge. */
+            default_domain?: string;
             /** Format: date-time */
             last_heartbeat?: string;
             /** Format: date-time */

app/frontend/src/lib/api-client.ts

@@ -362,6 +362,7 @@ export type NodeAgentEntity = {
   autoPrune: boolean;
   schedulable: boolean;
   tags: string[];
+  defaultDomain?: string;
   metadata: Record<string, unknown>;
   lastHeartbeat?: string;
   createdAt?: string;
@@ -1107,6 +1108,7 @@ function normalizeAgent(agent: RawNodeAgent): NodeAgentEntity | null {
     autoPrune: agent.auto_prune ?? false,
     schedulable: agent.schedulable ?? true,
     tags: Array.isArray(agent.tags) ? agent.tags : [],
+    defaultDomain: agent.default_domain || '',
     metadata: (agent.metadata ?? {}) as Record<string, unknown>,
     createdAt: agent.created_at,
     updatedAt: agent.updated_at,
@@ -1146,7 +1148,7 @@ export async function listAgents(): Promise<NodeAgentEntity[]> {
   return normalizeAgentArray(payload.agents);
 }
 
-export async function updateAgent(id: string, body: { name?: string; auto_prune?: boolean; tags?: string[] }): Promise<NodeAgentEntity | null> {
+export async function updateAgent(id: string, body: { name?: string; auto_prune?: boolean; tags?: string[]; default_domain?: string }): Promise<NodeAgentEntity | null> {
   const payload = await requestJson<{ agent?: RawNodeAgent }>(`/agents/${id}`, {
     method: 'PUT',
     body: JSON.stringify(body),