DaouOffice UIUX Upgrade

UI/UX Improvements for DaouOffice Groupware 1. Button Behavior Optimization Remove "Register" button after a single click: In menus such as the Calendar and Bulletin Boards, the "Register" button (e.g., "Add Schedule") will be removed immediately after the first click. Purpose: This prevents data loss or duplicate submissions that occur when a user accidentally clicks the "Register" button a second time instead of the "Confirm" button. 2. Sidebar Functionality Added Sidebar Expand/Collapse button: A new toggle button (indicated by the '>' icon) has been added next to the Organization Chart button. Responsive Layout: When the sidebar is collapsed, the main content area will automatically expand to fill the entire screen, maximizing your workspace.