feat: add remote daemon self-update from client (#1513)

* feat: add remote daemon self-update from client

Adds a daemon.update.request RPC that lets the client trigger a remote
daemon update over WebSocket. The daemon runs npm update -g @getpaseo/cli,
reports progress via daemon_update_progress status events, then restarts
through the supervisor to load the new code.

New feature flag server_info.features.daemonSelfUpdate gates the UI.
The UpdateDaemonCard appears on the host settings page when the daemon
supports self-update and the app/daemon versions differ.

* fix: clean up progress subscription on unmount, use typed phase cast

Address Greptile review:
- P1: store unsubscribe ref and clean up on component unmount to prevent
  listener leak during in-flight update
- P2: use DaemonUpdateProgressStatusPayload type instead of { phase?: string }

* fix: use npm install@latest and global concurrency guard

Address Greptile review:
- npm update -g can silently exit 0 without resolving major-version
  gaps; switch to npm install -g @getpaseo/cli@latest
- Move daemonUpdateInProgress from per-session instance to module-level
  variable so concurrent clients share the same guard

* feat(daemon): harden remote self-update

Probe the global npm CLI install before updating, keep request handling in a daemon self-update session controller, and emit scoped daemon.update.progress messages.

* test(daemon): make self-update paths platform-stable

---------

Co-authored-by: Mohamed Boudra <boudra.moha@gmail.com>

packages/protocol/src/messages.test.ts

@@ -402,3 +402,23 @@ describe("paseo worktree archive request compatibility", () => {
     expect(parsed.scope).toBe("workspace");
   });
 });
+
+describe("daemon update messages", () => {
+  test("daemon update progress is a scoped outbound message", () => {
+    const parsed = SessionOutboundMessageSchema.parse({
+      type: "daemon.update.progress",
+      payload: {
+        requestId: "update-1",
+        phase: "installing",
+      },
+    });
+
+    expect(parsed).toEqual({
+      type: "daemon.update.progress",
+      payload: {
+        requestId: "update-1",
+        phase: "installing",
+      },
+    });
+  });
+});