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/@radix-ui/react-use-is-hydrated/dist/index.mjs

@@ -0,0 +1,17 @@
+// src/use-is-hydrated.tsx
+import { useSyncExternalStore } from "use-sync-external-store/shim";
+function useIsHydrated() {
+  return useSyncExternalStore(
+    subscribe,
+    () => true,
+    () => false
+  );
+}
+function subscribe() {
+  return () => {
+  };
+}
+export {
+  useIsHydrated
+};
+//# sourceMappingURL=index.mjs.map