Remote deploy console: stream agent compose up to the browser (0.23.0)

Extends the live deploy console to remote/agent stacks. New agent WS endpoint
`/agent/ws/deploy/{stack_id}` runs `compose up -d` and streams its output; the
central app proxies it through `/ws/agent-deploy/{agent_id}/{stack_id}` (same
pattern + token URL-encoding as the agent-logs proxy) and records an
`agent.stack.start` audit entry. The editor's remote Deploy path now opens the
DeployConsole (agentId) instead of the blocking `agentsApi.action(start)`.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/src/components/stacks/DeployConsole.tsx

@@ -15,9 +15,11 @@ type Phase = "running" | "success" | "failed" | "error";
  */
 export function DeployConsole({
   stackId,
+  agentId,
   onClose,
 }: {
   stackId: string;
+  agentId?: number;
   onClose: () => void;
 }) {
   const [lines, setLines] = useState<string[]>([]);
@@ -29,7 +31,11 @@ export function DeployConsole({
   useEffect(() => {
     if (!token) return;
     const proto = window.location.protocol === "https:" ? "wss" : "ws";
-    const url = `${proto}://${window.location.host}/ws/deploy/${stackId}?token=${token}`;
+    const path =
+      agentId != null
+        ? `/ws/agent-deploy/${agentId}/${stackId}`
+        : `/ws/deploy/${stackId}`;
+    const url = `${proto}://${window.location.host}${path}?token=${token}`;
     const ws = new WebSocket(url);
     ws.onmessage = (ev) => {
       try {
@@ -54,7 +60,7 @@ export function DeployConsole({
       setPhase((p) => (p === "running" ? "error" : p));
     };
     return () => ws.close();
-  }, [stackId, token]);
+  }, [stackId, agentId, token]);
 
   useEffect(() => {
     if (boxRef.current) boxRef.current.scrollTop = boxRef.current.scrollHeight;