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/storefront/QuickCartSheet.tsx

@@ -225,7 +225,7 @@ function SheetContent({
             </h2>
           </div>
           {showCloseButton && (
-            <button
+            <button type="button"
               onClick={onContinue}
               aria-label="Close"
               className="flex h-9 w-9 items-center justify-center rounded-full text-stone-500 hover:bg-stone-900/5 hover:text-stone-900 transition-colors"
@@ -366,7 +366,7 @@ function SheetContent({
           >
             View full cart
           </Link>
-          <button
+          <button type="button"
             onClick={onContinue}
             className="font-semibold text-stone-600 hover:text-stone-950 underline-offset-4 hover:underline transition-colors"
           >