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/vitest/dist/path.js

@@ -0,0 +1,7 @@
+import { resolve } from 'node:path';
+import url from 'node:url';
+
+const rootDir = resolve(url.fileURLToPath(import.meta.url), "../../");
+const distDir = resolve(url.fileURLToPath(import.meta.url), "../../dist");
+
+export { distDir, rootDir };