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/@babel/runtime/helpers/classPrivateSetter.js

@@ -0,0 +1,5 @@
+var assertClassBrand = require("./assertClassBrand.js");
+function _classPrivateSetter(s, r, a, t) {
+  return r(assertClassBrand(s, a), t), t;
+}
+module.exports = _classPrivateSetter, module.exports.__esModule = true, module.exports["default"] = module.exports;