… task rendering

- Added visual drop indicators before and after task cards in the KanbanGroup component to improve user experience during drag-and-drop operations.
- Removed the isDropIndicator prop from TaskCard as the drop indicator logic is now handled within the KanbanGroup, simplifying the TaskCard component.
- Updated drag-and-drop event handling in TaskCard to better manage task positioning during drag operations, enhancing overall functionality.

… import

…ask interaction

- Added handleDragEnd function to reset hovered task and group states after drag operations in EnhancedKanbanBoard.
- Updated KanbanGroup and TaskCard components to support onDragEnd prop, enhancing drag-and-drop functionality and user experience during task management.

…opdown behavior

- Removed unused kanbanMode prop and related logic to simplify the AssigneeSelector component.
- Updated dropdown position handling to improve visibility and responsiveness during interactions.
- Optimized member selection logic for better performance and user feedback.
- Enhanced the rendering of team members with improved visual feedback for pending changes.

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