logo cleanups

app/common/src/main/java/stirling/software/common/model/ApplicationProperties.java

@@ -505,10 +505,19 @@ public class ApplicationProperties {
     public static class Ui {
         private String appNameNavbar;
         private List<String> languages;
+        private String logoStyle = "classic"; // Options: "classic" (default) or "modern"
 
         public String getAppNameNavbar() {
             return appNameNavbar != null && !appNameNavbar.trim().isEmpty() ? appNameNavbar : null;
         }
+
+        public String getLogoStyle() {
+            // Validate and return either "modern" or "classic"
+            if ("modern".equalsIgnoreCase(logoStyle)) {
+                return "modern";
+            }
+            return "classic"; // default
+        }
     }
 
     @Data