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/@testing-library/jest-dom/dist/jest-globals.js

@@ -0,0 +1,15 @@
+'use strict';
+
+var globals = require('@jest/globals');
+var matchers = require('./matchers-98b869c1.js');
+require('redent');
+require('@adobe/css-tools');
+require('dom-accessibility-api');
+require('aria-query');
+require('picocolors');
+require('css.escape');
+
+/* istanbul ignore file */
+
+
+globals.expect.extend(matchers.extensions);