fix: react-doctor control-has-associated-label 137→? (auto aria-labels)

Add aria-label to buttons (icon-only, pagination, action) and inputs
(placeholder-derived) via balanced-brace JSX parser. Files with complex
onClick expressions (deep brace nesting) skipped to avoid breakage.

src/components/admin/ProductsClient.tsx

@@ -573,7 +573,7 @@ function TableView({
                 <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)]"
-                >
+                 aria-label="Cancel">
                   Cancel
                 </button>
                 <AdminButton
@@ -727,7 +727,7 @@ function CardView({
                     <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)]"
-                    >
+                     aria-label="Cancel">
                       Cancel
                     </button>
                     <button type="button"