fix(KanbanGroup): enhance input focus behavior to select text on focus

- Updated the focus handling in KanbanGroup to select all text in the input field when focused, improving user experience during task editing.

worklenz-frontend/src/components/enhanced-kanban/EnhancedKanbanBoardNativeDnD/KanbanGroup.tsx

@@ -199,7 +199,10 @@ const KanbanGroup: React.FC<KanbanGroupProps> = memo(({
         setIsEditable(true);
         setShowDropdown(false);
         setTimeout(() => {
-            inputRef.current?.focus();
+            if (inputRef.current) {
+                inputRef.current.focus();
+                inputRef.current.select(); // Select all text on focus
+            }
         }, 100);
     };