feat(webfinger): add desktop-specific OIDC issuer support

services/webfinger/pkg/command/server.go

@@ -121,6 +121,11 @@ func getRelationProviders(cfg *config.Config) (map[string]service.RelationProvid
 		switch relationURI {
 		case relations.OpenIDConnectRel:
 			rels[relationURI] = relations.OpenIDDiscovery(cfg.IDP)
+		case relations.OpenIDConnectDesktopRel:
+			// Handled below - can also be auto-enabled via DesktopIDP config
+			if cfg.DesktopIDP != "" {
+				rels[relationURI] = relations.OpenIDDiscoveryDesktop(cfg.DesktopIDP)
+			}
 		case relations.OpenCloudInstanceRel:
 			var err error
 			rels[relationURI], err = relations.OpenCloudInstance(cfg.Instances, cfg.OpenCloudURL)
@@ -131,5 +136,16 @@ func getRelationProviders(cfg *config.Config) (map[string]service.RelationProvid
 			return nil, fmt.Errorf("unknown relation '%s'", relationURI)
 		}
 	}
+
+	// Auto-enable desktop OIDC issuer when DesktopIDP is configured,
+	// even if not explicitly listed in Relations. This provides a simpler
+	// configuration experience - just set WEBFINGER_OIDC_ISSUER_DESKTOP.
+	// See: https://github.com/opencloud-eu/desktop/issues/246
+	if cfg.DesktopIDP != "" {
+		if _, exists := rels[relations.OpenIDConnectDesktopRel]; !exists {
+			rels[relations.OpenIDConnectDesktopRel] = relations.OpenIDDiscoveryDesktop(cfg.DesktopIDP)
+		}
+	}
+
 	return rels, nil
 }