check add person photo finish

UI/src/app/shares/utils.ts

@@ -160,7 +160,13 @@ static formatNode(item:Person): TreeNode
 
      return node;
   }
-
+static getFileExtension(filename: string): string {
+  const lastDotIndex = filename.lastIndexOf('.');
+  if (lastDotIndex !== -1 && lastDotIndex < filename.length - 1) { // Ensure a dot exists and is not the last character
+    return filename.substring(lastDotIndex + 1);
+  }
+  return ''; // No extension found
+}
   static getChildForParentId(proName: MyProName , pid: number,childressNodes: Person[]): TreeNode[] {
     let result: TreeNode[] =[];
     let tree_node_child: TreeNode[];