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/_lib/test.mjs

@@ -0,0 +1,29 @@
+import { addLeadingZeros } from "./addLeadingZeros.mjs";
+import { setDefaultOptions } from "./defaultOptions.mjs";
+
+export function assertType(_) {}
+
+export function resetDefaultOptions() {
+  setDefaultOptions({});
+}
+
+// This makes sure we create the consistent offsets across timezones, no matter where these tests are ran.
+export function generateOffset(originalDate) {
+  // Add the timezone.
+  let offset = "";
+  const tzOffset = originalDate.getTimezoneOffset();
+
+  if (tzOffset !== 0) {
+    const absoluteOffset = Math.abs(tzOffset);
+    const hourOffset = addLeadingZeros(Math.trunc(absoluteOffset / 60), 2);
+    const minuteOffset = addLeadingZeros(absoluteOffset % 60, 2);
+    // If less than 0, the sign is +, because it is ahead of time.
+    const sign = tzOffset < 0 ? "+" : "-";
+
+    offset = `${sign}${hourOffset}:${minuteOffset}`;
+  } else {
+    offset = "Z";
+  }
+
+  return offset;
+}