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/dom-helpers/esm/css.d.ts

@@ -0,0 +1,6 @@
+import * as CSS from 'csstype';
+import { CamelProperty, HyphenProperty, Property } from './types';
+declare function style(node: HTMLElement, property: Partial<Record<Property, string>>): void;
+declare function style<T extends HyphenProperty>(node: HTMLElement, property: T): CSS.PropertiesHyphen[T];
+declare function style<T extends CamelProperty>(node: HTMLElement, property: T): CSS.Properties[T];
+export default style;