fix: WP-Admin CSS conflicts and add-to-cart redirect

- Fix CSS conflicts between WP-Admin and SPA (radio buttons, chart text)
- Add Tailwind important selector scoped to #woonoow-admin-app
- Remove overly aggressive inline SVG styles from Assets.php
- Add targeted WordPress admin CSS overrides in index.css
- Fix add-to-cart redirect to use woocommerce_add_to_cart_redirect filter
- Let WooCommerce handle cart operations natively for proper session management
- Remove duplicate tailwind.config.cjs

admin-spa/src/routes/Products/Edit.tsx

@@ -127,6 +127,7 @@ export default function ProductEdit() {
         onSubmit={handleSubmit}
         formRef={formRef}
         hideSubmitButton={true}
+        productId={product.id}
       />
 
       {/* Level 1 compatibility: Custom meta fields from plugins */}