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-previous/dist/index.mjs

@@ -0,0 +1,16 @@
+// packages/react/use-previous/src/use-previous.tsx
+import * as React from "react";
+function usePrevious(value) {
+  const ref = React.useRef({ value, previous: value });
+  return React.useMemo(() => {
+    if (ref.current.value !== value) {
+      ref.current.previous = ref.current.value;
+      ref.current.value = value;
+    }
+    return ref.current.previous;
+  }, [value]);
+}
+export {
+  usePrevious
+};
+//# sourceMappingURL=index.mjs.map