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-visually-hidden/dist/index.d.mts

@@ -0,0 +1,22 @@
+import * as React from 'react';
+import { Primitive } from '@radix-ui/react-primitive';
+
+declare const VISUALLY_HIDDEN_STYLES: Readonly<{
+    position: "absolute";
+    border: 0;
+    width: 1;
+    height: 1;
+    padding: 0;
+    margin: -1;
+    overflow: "hidden";
+    clip: "rect(0, 0, 0, 0)";
+    whiteSpace: "nowrap";
+    wordWrap: "normal";
+}>;
+type PrimitiveSpanProps = React.ComponentPropsWithoutRef<typeof Primitive.span>;
+interface VisuallyHiddenProps extends PrimitiveSpanProps {
+}
+declare const VisuallyHidden: React.ForwardRefExoticComponent<VisuallyHiddenProps & React.RefAttributes<HTMLSpanElement>>;
+declare const Root: React.ForwardRefExoticComponent<VisuallyHiddenProps & React.RefAttributes<HTMLSpanElement>>;
+
+export { Root, VISUALLY_HIDDEN_STYLES, VisuallyHidden, type VisuallyHiddenProps };