Bulk Delete & UI Enhancements

I need three functional upgrades added to my existing web application.

1. Deleting data
For Customers, Vendors, Chart of Accounts, Account Types, Revenue Categories and Expense Categories I currently have no easy way to remove records. Please add single-item delete plus multi-select bulk delete. The action must be a permanent delete rather than moving items to a trash or archive. Each affected table should update immediately in the UI once the operation completes so the user sees the change without a page refresh.

2. Notification system
Place a bell (or similar) icon in the top bar. It should display an unread badge whenever a system alert is generated. Access to the underlying notification list has to respect the existing role structure (Super-admin, Company, Client, Vendor, etc.), so users only see alerts they are permitted to view. A separate notifications page should open from the icon where messages are grouped or filtered by date and read/unread state. and also connect to push notification.

3. Screen-mode toggle
Also in the top bar I want a display-mode switch that cycles through Dark, Light and Auto. “Auto” should follow the user’s OS/ browser preference and switch seamlessly when that preference changes.

Scope and expectations
• All functionality must be delivered for the Web version of the app; no mobile work is required.
• Code must integrate cleanly with the current stack (I will provide repository access and setup instructions once we start).
• Please supply concise installation or migration notes and any database alterations.
• I will consider the job done after I can delete single or multiple records permanently, receive role-filtered system alerts through the new icon, and toggle display modes without visual glitches across pages.