fix caching UI for pool

internal/httpapp/api_handlers.go

@@ -40,6 +40,12 @@ func (a *App) handleListPools(w http.ResponseWriter, r *http.Request) {
 	if pools == nil {
 		pools = []models.Pool{}
 	}
+
+	// Set cache-control headers to prevent caching - pools list changes frequently
+	w.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
+	w.Header().Set("Pragma", "no-cache")
+	w.Header().Set("Expires", "0")
+
 	writeJSON(w, http.StatusOK, pools)
 }
 
@@ -114,6 +120,11 @@ func (a *App) handleDeletePool(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	// Set cache-control headers to prevent caching of this response
+	w.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
+	w.Header().Set("Pragma", "no-cache")
+	w.Header().Set("Expires", "0")
+
 	writeJSON(w, http.StatusOK, map[string]string{"message": "pool destroyed", "name": name})
 }