Fix empty Sonic discovery: KnownContainers fallback and clearer domain status.

Co-authored-by: Cursor <cursoragent@cursor.com>

ZA.CoreService.ESBCertificateManager/Form1.cs

@@ -1829,23 +1829,41 @@ namespace ZA.CoreService.ESBCertificateManager
                     return;
                 }
 
-                // Grid mit entdeckten Containern befüllen
+                // Grid mit entdeckten + konfigurierten Containern befüllen
                 _loadedTargets = result.DiscoveredTargets;
                 BindTargetsToGrid(result.DiscoveredTargets);
 
-                int configured = result.DiscoveredTargets.Count(t => !string.IsNullOrWhiteSpace(t.TargetDirectory));
-                int discovered = result.RawContainerNames.Count;
+                int total = result.DiscoveredTargets.Count;
+                int remote = result.RawContainerNames.Count;
+                string domain = string.IsNullOrWhiteSpace(result.DomainName)
+                    ? selectedConnection
+                    : result.DomainName;
 
-                lblSonicStatus.Text = discovered > 0
-                    ? $"{discovered} Container gefunden, {configured} konfiguriert"
-                    : $"Verbindung ok – keine Container in Domain '{selectedConnection}'";
-                lblSonicStatus.ForeColor = discovered > 0 ? GreenColor : GoldColor;
+                if (total == 0)
+                {
+                    lblSonicStatus.Text = $"Verb. ok – 0 Container in Domain '{domain}'";
+                    lblSonicStatus.ForeColor = GoldColor;
+                    SetStatus(
+                        result.ErrorMessage
+                        ?? $"Sonic Domain '{domain}': keine Container. KnownContainers/SonicHome in appsettings prüfen.",
+                        isError: true);
+                }
+                else if (remote == 0)
+                {
+                    lblSonicStatus.Text = $"Verb. ok – Domain '{domain}': 0 remote, {total} aus Config";
+                    lblSonicStatus.ForeColor = GoldColor;
+                    SetStatus(
+                        $"Domain '{domain}': Remote leer – {total} Ziel(e) aus appsettings/KnownContainers. "
+                        + (result.ErrorMessage ?? string.Empty),
+                        isError: false);
+                }
+                else
+                {
+                    lblSonicStatus.Text = $"Domain '{domain}': {remote} remote, {total} gesamt";
+                    lblSonicStatus.ForeColor = GreenColor;
+                    SetStatus($"Sonic Domain '{domain}': {total} Ziel(e) geladen ({remote} remote).", isError: false);
+                }
 
-                SetStatus(
-                    $"Sonic {selectedConnection}: {discovered} Container geladen.",
-                    isError: false);
-
-                // Nicht-konfigurierte Ziele visuell markieren
                 MarkUnconfiguredRows();
             }
             catch (OperationCanceledException)