Replace portal title with entity name

Store a short entity name instead of the full home
heading so orgs can brand portals for sub-entities.
Restore hero i18n composition and keep the English
document title composed from the entity name.

Signed-off-by: Émile Ré <emile@probo.com>

pkg/complianceportal/visitor/cimd.go

@@ -85,7 +85,7 @@ func BuildClientMetadataDocument(
 
 	doc := oauth2.ClientMetadataDocument{
 		ClientID:                clientID,
-		ClientName:              portal.Title,
+		ClientName:              "Compliance at " + portal.EntityName + ".",
 		ClientURI:               portalRootURL,
 		RedirectURIs:            []string{redirectURI},
 		TokenEndpointAuthMethod: "none",