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/quartersToMonths.mjs

@@ -0,0 +1,27 @@
+import { monthsInQuarter } from "./constants.mjs";
+
+/**
+ * @name quartersToMonths
+ * @category Conversion Helpers
+ * @summary Convert number of quarters to months.
+ *
+ * @description
+ * Convert a number of quarters to a full number of months.
+ *
+ * @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 quarters - The number of quarters to be converted
+ *
+ * @returns The number of quarters converted in months
+ *
+ * @example
+ * // Convert 2 quarters to months
+ * const result = quartersToMonths(2)
+ * //=> 6
+ */
+export function quartersToMonths(quarters) {
+  return Math.trunc(quarters * monthsInQuarter);
+}
+
+// Fallback for modularized imports:
+export default quartersToMonths;