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/startOfSecond.d.ts

@@ -0,0 +1,23 @@
+/**
+ * @name startOfSecond
+ * @category Second Helpers
+ * @summary Return the start of a second for the given date.
+ *
+ * @description
+ * Return the start of a second for the given date.
+ * The result will be in the local timezone.
+ *
+ * @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 original date
+ *
+ * @returns The start of a second
+ *
+ * @example
+ * // The start of a second for 1 December 2014 22:15:45.400:
+ * const result = startOfSecond(new Date(2014, 11, 1, 22, 15, 45, 400))
+ * //=> Mon Dec 01 2014 22:15:45.000
+ */
+export declare function startOfSecond<DateType extends Date>(
+  date: DateType | number | string,
+): DateType;