feat: redesign Exams List page to show submitted custom exams

- Added Custom Exams tab showing all exams from Generation page
- Displays title, module badges, duration, and status
- Added Create Exam button
- Kept Exam Sessions tab for institutional sessions
- Search filters across exams

Made-with: Cursor

node_modules/call-bind-apply-helpers/reflectApply.js

@@ -0,0 +1,4 @@
+'use strict';
+
+/** @type {import('./reflectApply')} */
+module.exports = typeof Reflect !== 'undefined' && Reflect && Reflect.apply;