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/subSeconds.js

@@ -0,0 +1,27 @@
+"use strict";
+exports.subSeconds = subSeconds;
+var _index = require("./addSeconds.js");
+
+/**
+ * @name subSeconds
+ * @category Second Helpers
+ * @summary Subtract the specified number of seconds from the given date.
+ *
+ * @description
+ * Subtract the specified number of seconds 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 seconds to be subtracted.
+ *
+ * @returns The new date with the seconds subtracted
+ *
+ * @example
+ * // Subtract 30 seconds from 10 July 2014 12:45:00:
+ * const result = subSeconds(new Date(2014, 6, 10, 12, 45, 0), 30)
+ * //=> Thu Jul 10 2014 12:44:30
+ */
+function subSeconds(date, amount) {
+  return (0, _index.addSeconds)(date, -amount);
+}