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/date-fns/subHours.d.mts

@@ -0,0 +1,24 @@
+/**
+ * @name subHours
+ * @category Hour Helpers
+ * @summary Subtract the specified number of hours from the given date.
+ *
+ * @description
+ * Subtract the specified number of hours from the given date.
+ *
+ * @typeParam DateType - The `Date` type, the function operates on. Gets inferred from passed arguments. Allows to use extensions like [`UTCDate`](https://github.com/date-fns/utc).
+ *
+ * @param date - The date to be changed
+ * @param amount - The amount of hours to be subtracted.
+ *
+ * @returns The new date with the hours subtracted
+ *
+ * @example
+ * // Subtract 2 hours from 11 July 2014 01:00:00:
+ * const result = subHours(new Date(2014, 6, 11, 1, 0), 2)
+ * //=> Thu Jul 10 2014 23:00:00
+ */
+export declare function subHours<DateType extends Date>(
+  date: DateType | number | string,
+  amount: number,
+): DateType;