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/lz-string/typings/lz-string.d.ts

@@ -0,0 +1,14 @@
+export function compressToBase64(input: string): string;
+export function decompressFromBase64(input: string): string;
+
+export function compressToUTF16(input: string): string;
+export function decompressFromUTF16(compressed: string): string;
+
+export function compressToUint8Array(uncompressed: string): Uint8Array;
+export function decompressFromUint8Array(compressed: Uint8Array): string;
+
+export function compressToEncodedURIComponent(input: string): string;
+export function decompressFromEncodedURIComponent(compressed: string): string;
+
+export function compress(input: string): string;
+export function decompress(compressed: string): string;