report daemon-down as DaemonUnavailable on initial Peers.Get and gate UI

- Peers.Get returns Status{Status: DaemonUnavailable} on Unavailable
  instead of an error so the React useStatus initial refresh picks up
  the same string the live event stream emits — the overlay no longer
  depends on receiving the synthetic event during boot.
- ProfileContext.refresh swallows Unavailable so the redundant
  "Load Profiles Failed" popup does not overlap the overlay.
- Tray Profiles submenu is disabled while the daemon is unavailable,
  matching the existing settings/debug/connect gating.
- gRPC client uses a 5s ConnectParams MaxDelay; the default 120s cap
  was keeping the SubChannel in backoff for tens of seconds after the
  daemon came back, masking the recovery.

client/ui/services/peers.go

@@ -253,14 +253,25 @@ func (s *Peers) ServiceShutdown() error {
 	return nil
 }
 
-// Get returns the current daemon status snapshot.
+// Get returns the current daemon status snapshot. When the daemon socket
+// is unreachable (process down, socket missing, permission denied) it
+// returns Status{Status: StatusDaemonUnavailable} instead of an error so
+// the frontend's initial useStatus().refresh() picks up the same string
+// the live event stream emits — the React overlay and per-screen gating
+// then key off a single status enum without a parallel "error" path.
 func (s *Peers) Get(ctx context.Context) (Status, error) {
 	cli, err := s.conn.Client()
 	if err != nil {
+		if isDaemonUnreachable(err) {
+			return Status{Status: StatusDaemonUnavailable}, nil
+		}
 		return Status{}, err
 	}
 	resp, err := cli.Status(ctx, &proto.StatusRequest{GetFullPeerStatus: true})
 	if err != nil {
+		if isDaemonUnreachable(err) {
+			return Status{Status: StatusDaemonUnavailable}, nil
+		}
 		return Status{}, err
 	}
 	return statusFromProto(resp), nil