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/matchers.mjs

@@ -0,0 +1,7 @@
+export { H as toAppearAfter, G as toAppearBefore, z as toBeChecked, r as toBeDisabled, b as toBeEmpty, c as toBeEmptyDOMElement, s as toBeEnabled, t as toBeInTheDOM, a as toBeInTheDocument, v as toBeInvalid, A as toBePartiallyChecked, F as toBePartiallyPressed, E as toBePressed, u as toBeRequired, w as toBeValid, q as toBeVisible, d as toContainElement, f as toContainHTML, h as toHaveAccessibleDescription, i as toHaveAccessibleErrorMessage, k as toHaveAccessibleName, l as toHaveAttribute, m as toHaveClass, B as toHaveDescription, y as toHaveDisplayValue, C as toHaveErrorMessage, o as toHaveFocus, p as toHaveFormValues, j as toHaveRole, D as toHaveSelection, n as toHaveStyle, g as toHaveTextContent, x as toHaveValue } from './matchers-35e4d3bd.mjs';
+import 'redent';
+import '@adobe/css-tools';
+import 'dom-accessibility-api';
+import 'aria-query';
+import 'picocolors';
+import 'css.escape';