Add --monitor: live status view (downstream health, GPU lock, queue) via the control channel

internal/proxy/proxy.go

@@ -491,6 +491,7 @@ func (s *Server) OllamaHandler() http.Handler {
 			return
 		}
 		defer s.cfg.Lock.ReleaseLLM()
+		s.cfg.Lock.SetDetail("ollama: " + r.Method + " " + r.URL.Path)
 		s.ollamaProxy.ServeHTTP(w, r)
 	}))
 }
@@ -590,6 +591,7 @@ func (s *Server) handlePrompt(w http.ResponseWriter, r *http.Request) {
 	}
 	s.cfg.Metrics.ObserveLockWait("image", time.Since(start).Seconds())
 	log.Info("image lock acquired")
+	s.cfg.Lock.SetDetail("comfy: POST /prompt")
 
 	if s.cfg.ComfySup != nil && !comfyFirst {
 		if err := s.cfg.ComfySup.EnsureRunning(); err != nil {