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/minutesToSeconds.js

@@ -0,0 +1,24 @@
+"use strict";
+exports.minutesToSeconds = minutesToSeconds;
+var _index = require("./constants.js");
+
+/**
+ * @name minutesToSeconds
+ * @category Conversion Helpers
+ * @summary Convert minutes to seconds.
+ *
+ * @description
+ * Convert a number of minutes to a full number of seconds.
+ *
+ * @param minutes - The number of minutes to be converted
+ *
+ * @returns The number of minutes converted in seconds
+ *
+ * @example
+ * // Convert 2 minutes to seconds
+ * const result = minutesToSeconds(2)
+ * //=> 120
+ */
+function minutesToSeconds(minutes) {
+  return Math.trunc(minutes * _index.secondsInMinute);
+}