fix: product texts, mobile nav background, mobile product page layout

- Fix PayloadRichText: migrate custom JSX converters to Lexical v3 nodesToJSX API
  - paragraph, heading, list, listitem, quote, link converters now use nodesToJSX
  - Resolves missing product texts since PayloadCMS migration
- Fix mobile navigation: move overlay outside <header> to prevent fixed-position clipping
  - Header transform/backdrop-filter was containing the fixed overlay
  - Use bg-primary/95 backdrop-blur-3xl for premium blue background
- Fix product image mobile layout: use md:-mt-32 responsive prefix
  - Negative margin only applies on md+ to avoid overlap on mobile
- Improve mobile product page UX:
  - Breadcrumbs: flex-wrap, truncate, reduced separator spacing
  - Hero: reduced top padding pt-28 on mobile
  - Product image card: 4/3 aspect ratio and smaller padding on mobile
  - Section spacing: use responsive md: prefixes throughout
  - Data tables: 2-col grid on mobile, smaller card padding/radius
  - Tables: add right-edge scroll hint gradient on mobile

app/[locale]/products/[...slug]/page.tsx

@@ -322,6 +322,8 @@ export default async function ProductPage({ params }: ProductPageProps) {
     }
   }
 
+  console.log(`[DEBUG PAGE] Slug: ${productSlug}, children count: ${descriptionChildren.length}`);
+
   const descriptionContent = {
     root: {
       ...product.content.root,
@@ -353,29 +355,31 @@ export default async function ProductPage({ params }: ProductPageProps) {
         categories={product.frontmatter.categories}
         sku={product.frontmatter.sku}
       />
-      <section className="relative pt-40 pb-24 overflow-hidden bg-primary-dark">
+      <section className="relative pt-28 md:pt-40 pb-12 md:pb-24 overflow-hidden bg-primary-dark">
         {/* Background Decorative Elements */}
         <div className="absolute top-0 right-0 w-1/2 h-full bg-gradient-to-l from-accent/5 to-transparent pointer-events-none" />
         <div className="absolute -top-24 -right-24 w-96 h-96 bg-accent/10 rounded-full blur-3xl pointer-events-none" />
 
         <Container className="relative z-10">
           <div className="max-w-4xl animate-slide-up">
-            <nav className="flex items-center mb-12 text-white/40 text-[10px] font-black uppercase tracking-[0.2em]">
+            <nav className="flex flex-wrap items-center gap-y-1 mb-6 md:mb-12 text-white/40 text-[10px] font-black uppercase tracking-[0.2em]">
               <Link
                 href={`/${locale}/${productsSlug}`}
-                className="hover:text-accent transition-colors"
+                className="hover:text-accent transition-colors shrink-0"
               >
                 {t.has('breadcrumb') ? t('breadcrumb') : 'Products'}
               </Link>
-              <span className="mx-4 opacity-20">/</span>
+              <span className="mx-2 md:mx-4 opacity-20">/</span>
               <Link
                 href={`/${locale}/${productsSlug}/${categorySlug}`}
-                className="hover:text-accent transition-colors"
+                className="hover:text-accent transition-colors shrink-0 max-w-[140px] truncate"
               >
                 {categoryTitle}
               </Link>
-              <span className="mx-4 opacity-20">/</span>
-              <span className="text-white/90">{product.frontmatter.title}</span>
+              <span className="mx-2 md:mx-4 opacity-20">/</span>
+              <span className="text-white/90 truncate max-w-[140px] md:max-w-none">
+                {product.frontmatter.title}
+              </span>
             </nav>
 
             <div className="flex flex-col lg:flex-row lg:items-center justify-between gap-12">
@@ -386,7 +390,7 @@ export default async function ProductPage({ params }: ProductPageProps) {
                     {t('englishVersion')}
                   </div>
                 )}
-                <div className="flex flex-wrap gap-3 mb-8">
+                <div className="flex flex-wrap gap-2 mb-4 md:mb-8">
                   {product.frontmatter.categories.map((cat, idx) => (
                     <Badge
                       key={idx}
@@ -397,10 +401,10 @@ export default async function ProductPage({ params }: ProductPageProps) {
                     </Badge>
                   ))}
                 </div>
-                <Heading level={1} className="text-white mb-8 uppercase">
+                <Heading level={1} className="text-white mb-4 md:mb-8 uppercase">
                   {product.frontmatter.title}
                 </Heading>
-                <p className="text-xl md:text-2xl text-white/60 max-w-2xl leading-relaxed font-medium">
+                <p className="text-base md:text-xl lg:text-2xl text-white/60 max-w-2xl leading-relaxed font-medium">
                   {product.frontmatter.description}
                 </p>
               </div>
@@ -414,11 +418,11 @@ export default async function ProductPage({ params }: ProductPageProps) {
           {/* Large Product Image Section */}
           {product.frontmatter.images && product.frontmatter.images.length > 0 && (
             <div
-              className="relative -mt-32 mb-32 animate-slide-up"
+              className="relative md:-mt-32 mb-8 md:mb-32 animate-slide-up"
               style={{ animationDelay: '200ms' }}
             >
-              <div className="bg-white shadow-[0_32px_64px_-12px_rgba(0,0,0,0.1)] rounded-[48px] border border-neutral-dark/5 overflow-hidden p-12 md:p-20 lg:p-24">
-                <div className="relative w-full aspect-[21/9]">
+              <div className="bg-white shadow-[0_32px_64px_-12px_rgba(0,0,0,0.1)] rounded-[24px] md:rounded-[48px] border border-neutral-dark/5 overflow-hidden p-6 md:p-20 lg:p-24">
+                <div className="relative w-full aspect-[4/3] md:aspect-[21/9]">
                   <Image
                     src={product.frontmatter.images[0]}
                     alt={product.frontmatter.title}
@@ -453,10 +457,10 @@ export default async function ProductPage({ params }: ProductPageProps) {
             </div>
           )}
 
-          <div className="grid grid-cols-1 lg:grid-cols-12 gap-12 lg:gap-20">
+          <div className="grid grid-cols-1 lg:grid-cols-12 gap-8 lg:gap-20">
             {/* Description Area Next to Sidebar */}
             <div className="lg:col-span-8">
-              <div className="max-w-none prose prose-primary prose-lg md:prose-xl mb-16 pb-16 border-b border-neutral-dark/5">
+              <div className="max-w-none prose prose-primary prose-base md:prose-lg xl:prose-xl mb-8 md:mb-16 pb-8 md:pb-16 border-b border-neutral-dark/5">
                 {descriptionChildren.length > 0 ? (
                   <PayloadRichText data={descriptionContent} />
                 ) : product.frontmatter.description ? (
@@ -464,6 +468,12 @@ export default async function ProductPage({ params }: ProductPageProps) {
                     {product.frontmatter.description}
                   </p>
                 ) : null}
+
+                {product.application?.root?.children?.length > 0 && (
+                  <div className="mt-12">
+                    <PayloadRichText data={product.application} />
+                  </div>
+                )}
               </div>
             </div>
 
@@ -472,7 +482,7 @@ export default async function ProductPage({ params }: ProductPageProps) {
           </div>
 
           {/* Full-width Technical Data Below */}
-          <div className="mt-16 pt-16 border-t-0">
+          <div className="mt-8 md:mt-16 pt-8 md:pt-16 border-t-0">
             <div className="max-w-none prose prose-primary prose-lg md:prose-xl">
               <PayloadRichText data={technicalContent} />
             </div>
@@ -530,7 +540,7 @@ export default async function ProductPage({ params }: ProductPageProps) {
           </div>
 
           {/* Related Products Section */}
-          <div className="mt-16 pt-16 border-t border-neutral-dark/5">
+          <div className="mt-10 md:mt-16 pt-10 md:pt-16 border-t border-neutral-dark/5">
             <RelatedProducts
               currentSlug={productSlug}
               categories={product.frontmatter.categories}