UI and Code Optimization Tasks

[sumitt-kun]

1.Improve font and styles of all tables on admin side to resemble professional reports.
2. Enhance styling, color, and border width of Excel sheets.
3. Consolidate redundant code used across multiple pages (e.g., sort and filter functionalities) into reusable wrappers.
4. Display uploaded file names in Placement record section after revisiting; currently, only details are visible without filenames.
5. Create wrappers for tables to ensure consistent UI across the application.
6. Implement drop-downs for fixed fields like semester and branch, and apply regex for input fields such as roll numbers across all applicable areas.