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/isThisSecond.d.ts

@@ -0,0 +1,24 @@
+/**
+ * @name isThisSecond
+ * @category Second Helpers
+ * @summary Is the given date in the same second as the current date?
+ * @pure false
+ *
+ * @description
+ * Is the given date in the same second as the current 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 check
+ *
+ * @returns The date is in this second
+ *
+ * @example
+ * // If now is 25 September 2014 18:30:15.500,
+ * // is 25 September 2014 18:30:15.000 in this second?
+ * const result = isThisSecond(new Date(2014, 8, 25, 18, 30, 15))
+ * //=> true
+ */
+export declare function isThisSecond<DateType extends Date>(
+  date: DateType | number | string,
+): boolean;