fix(dees-appui): set min-height: 0 on .maingrid > dees-appui-maincontent to prevent layout overflow in flex container

ts_web/elements/dees-icon/dees-icon.ts

@@ -257,12 +257,13 @@ export class DeesIcon extends DeesElement {
    * @returns Object with type and name properties
    */
   private parseIconString(iconStr: string): { type: 'fa' | 'lucide', name: string } {
-    if (iconStr.startsWith('fa:')) {
+    const lowerStr = iconStr.toLowerCase();
+    if (lowerStr.startsWith('fa:')) {
       return {
         type: 'fa',
         name: iconStr.substring(3) // Remove 'fa:' prefix
       };
-    } else if (iconStr.startsWith('lucide:')) {
+    } else if (lowerStr.startsWith('lucide:')) {
       return {
         type: 'lucide',
         name: iconStr.substring(7) // Remove 'lucide:' prefix