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/ProductsClient.tsx

@@ -468,7 +468,7 @@ function TableView({
                       </div>
                     )}
                     <div>
-                      <button
+                      <button type="button"
                         onClick={() => onEdit(product)}
                         className="font-semibold text-[var(--admin-text-primary)] hover:text-[var(--admin-primary)] transition-colors text-left"
                       >
@@ -509,7 +509,7 @@ function TableView({
                     >
                       Edit
                     </AdminButton>
-                    <button
+                    <button type="button"
                       ref={(el) => { buttonRefs.current[product.id] = el; }}
                       onClick={() => onDelete(product.id)}
                       className="rounded-lg px-2 py-1.5 text-xs text-[var(--admin-text-muted)] hover:text-[var(--admin-danger)] hover:bg-[var(--admin-danger-soft)] transition-colors"
@@ -550,7 +550,7 @@ function TableView({
                 This will remove the product. If attached to orders, it will be hidden.
               </p>
               <div className="mt-3 flex gap-2">
-                <button
+                <button type="button"
                   onClick={onDeleteCancel}
                   className="flex-1 rounded-lg border border-[var(--admin-border)] bg-[var(--admin-card-bg)] px-3 py-2 text-xs font-semibold text-[var(--admin-text-primary)] hover:bg-[var(--admin-bg)]"
                 >
@@ -638,7 +638,7 @@ function CardView({
 
             {/* Content */}
             <div className="p-4">
-              <button
+              <button type="button"
                 onClick={() => onEdit(product)}
                 className="block w-full text-left"
               >
@@ -681,7 +681,7 @@ function CardView({
                 >
                   Edit
                 </AdminButton>
-                <button
+                <button type="button"
                   onClick={() => onDelete(product.id)}
                   className="rounded-lg border border-[var(--admin-border)] px-3 py-2 text-xs font-semibold text-[var(--admin-text-muted)] hover:bg-[var(--admin-danger-soft)] hover:text-[var(--admin-danger)] hover:border-[var(--admin-danger)] transition-colors"
                 >
@@ -703,13 +703,13 @@ function CardView({
                     This will remove the product. If attached to orders, it will be hidden.
                   </p>
                   <div className="flex gap-2 mt-3">
-                    <button
+                    <button type="button"
                       onClick={onDeleteCancel}
                       className="flex-1 rounded-lg border border-[var(--admin-border)] px-3 py-2 text-xs font-semibold text-[var(--admin-text-primary)] hover:bg-[var(--admin-bg)]"
                     >
                       Cancel
                     </button>
-                    <button
+                    <button type="button"
                       onClick={() => onDeleteConfirm(product.id)}
                       disabled={deletingId === product.id}
                       className="flex-1 rounded-lg bg-[var(--admin-danger)] px-3 py-2 text-xs font-bold text-white disabled:opacity-50 hover:bg-[var(--admin-danger-hover)]"