fix: trigger discovery when all registered devices are offline

internal/api/handlers.go

@@ -128,8 +128,18 @@ func (h *Handler) ensureDevicesLoaded() {
 	if h.registry == nil || h.discovery == nil {
 		return
 	}
-	if len(h.registry.GetDevices()) > 0 {
-		return
+	devices := h.registry.GetDevices()
+	if len(devices) > 0 {
+		hasOnline := false
+		for _, d := range devices {
+			if d.Online {
+				hasOnline = true
+				break
+			}
+		}
+		if hasOnline {
+			return
+		}
 	}
 	_, _ = h.discovery.SearchDefault()
 	if len(h.registry.GetDevices()) == 0 {

internal/web/ui.go

@@ -700,11 +700,21 @@ func (u *UI) ensureDevicesLoaded() {
 	if u.registry == nil || u.discovery == nil {
 		return
 	}
-	if len(u.registry.GetDevices()) > 0 {
-		return
+	devices := u.registry.GetDevices()
+	if len(devices) > 0 {
+		// Check if any device is online; if not, try discovery to refresh
+		hasOnline := false
+		for _, d := range devices {
+			if d.Online {
+				hasOnline = true
+				break
+			}
+		}
+		if hasOnline {
+			return
+		}
 	}
 	_, _ = u.discovery.SearchDefault()
-	// Retry once if discovery returned nothing (UDP broadcast can be lossy on some networks)
 	if len(u.registry.GetDevices()) == 0 {
 		_, _ = u.discovery.SearchDefault()
 	}