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/zod/v4/classic/external.d.ts

@@ -0,0 +1,13 @@
+export * as core from "../core/index.js";
+export * from "./schemas.js";
+export * from "./checks.js";
+export * from "./errors.js";
+export * from "./parse.js";
+export * from "./compat.js";
+export type { infer, output, input } from "../core/index.js";
+export { globalRegistry, type GlobalMeta, registry, config, function, $output, $input, $brand, clone, regexes, treeifyError, prettifyError, formatError, flattenError, toJSONSchema, TimePrecision, NEVER, } from "../core/index.js";
+export * as locales from "../locales/index.js";
+export { ZodISODateTime, ZodISODate, ZodISOTime, ZodISODuration } from "./iso.js";
+export * as iso from "./iso.js";
+export type { ZodCoercedString, ZodCoercedNumber, ZodCoercedBigInt, ZodCoercedBoolean, ZodCoercedDate, } from "./coerce.js";
+export * as coerce from "./coerce.js";