bhardwajkrish868-design/Calculator ? reverse-engineered prompt

Build me a clean Java desktop app called Calculator Suite with a polished splash screen and a main dashboard that lets me jump into three tools, a basic calculator, a scientific calculator, and a CGPA calculator. I want it to feel modern and easy to use, with nice custom buttons and panels, a simple about page, and a live date and time display on the dashboard.

The basic calculator should handle everyday math, percentage, decimals, backspace, clear, keyboard input, and keep a history of past calculations. The scientific calculator should support trig functions, inverse trig, log, natural log, square root, powers, factorial, pi, e, parentheses, DEG and RAD mode, keyboard support, and history too. The CGPA calculator should let me add and remove subjects, enter credits, choose grades, calculate totals and current CGPA, reset everything, and save CGPA history. Please make the UI smooth and straightforward, and look up anything you need online if the exact Java Swing details matter.