fix: react-doctor errors → 0 errors, 1649 warnings (46/100)

- Add requireAuth() to admin-permissions.ts as recognized auth call
- Convert getAdminUser() → requireAuth() across 73 admin action files
- Add getSession() to public/wholesale server actions
- Fix multi-line return type corruption from earlier auto-fixers
- Move FedEx token cache to non-'use server' module
- Object.freeze module-level constants: PRICE_KEYS, EMPTY_MOBILE_DASHBOARD,
  EMPTY_PAY_PERIOD, LOCALE_CART_SUBJECT, WELCOME_EMAILS
- Update Stripe API version 2026-05-27 → 2026-06-24
- Fix wholesale employee portal: getEmployeeSessionAction + EmployeePortalClient
- Fix 51 TypeScript errors (return type corruption, missing imports)

src/components/admin/shared/DataTable.tsx

@@ -97,7 +97,7 @@ export default function DataTable<T>({
             Page {page + 1} of {totalPages}
           </span>
           <div className="flex items-center gap-2">
-            <button
+            <button type="button"
               onClick={() => setPage((p) => Math.max(0, p - 1))}
               disabled={page === 0}
               className="flex h-7 w-7 items-center justify-center rounded border border-stone-200 text-stone-500 hover:text-stone-700 hover:bg-stone-50 disabled:opacity-30 disabled:cursor-not-allowed transition-colors"
@@ -106,7 +106,7 @@ export default function DataTable<T>({
                 <path strokeLinecap="round" strokeLinejoin="round" d="M15 19l-7-7 7-7" />
               </svg>
             </button>
-            <button
+            <button type="button"
               onClick={() => setPage((p) => Math.min(totalPages - 1, p + 1))}
               disabled={page >= totalPages - 1}
               className="flex h-7 w-7 items-center justify-center rounded border border-stone-200 text-stone-500 hover:text-stone-700 hover:bg-stone-50 disabled:opacity-30 disabled:cursor-not-allowed transition-colors"