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/tinyrainbow/dist/browser.js

@@ -0,0 +1,20 @@
+import {
+  a as t,
+  b as o,
+  c as r
+} from "./chunk-BVHSVHOK.js";
+
+// src/browser.ts
+function p() {
+  return o();
+}
+function a() {
+  return r();
+}
+var s = r();
+export {
+  a as createColors,
+  s as default,
+  t as getDefaultColors,
+  p as isSupported
+};