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

components/Header.tsx

@@ -141,7 +141,8 @@ export default function Header() {
     {
       'bg-primary/95 backdrop-blur-md md:bg-transparent py-3 md:py-8 shadow-2xl md:shadow-none':
         isHomePage && !isScrolled && !isMobileMenuOpen,
-      'bg-primary py-3 md:py-4 shadow-2xl': !isHomePage || isScrolled || isMobileMenuOpen,
+      'bg-primary/90 backdrop-blur-md py-3 md:py-4 shadow-2xl':
+        !isHomePage || isScrolled || isMobileMenuOpen,
     },
   );
 
@@ -152,9 +153,7 @@ export default function Header() {
     <>
       <header className={headerClass} style={{ animationDuration: '800ms' }}>
         <div className="container mx-auto px-4 md:px-12 lg:px-16 max-w-7xl flex items-center justify-between">
-          <div
-            className="flex-shrink-0 group touch-target fill-mode-both"
-          >
+          <div className="flex-shrink-0 group touch-target fill-mode-both">
             <Link
               href={`/${currentLocale}`}
               onClick={() =>
@@ -336,115 +335,115 @@ export default function Header() {
             </button>
           </div>
         </div>
+      </header>
 
-        {/* Mobile Menu Overlay */}
-        <div
-          className={cn(
-            'fixed inset-0 bg-primary z-[60] lg:hidden transition-all duration-500 ease-in-out flex flex-col',
-            isMobileMenuOpen
-              ? 'opacity-100 translate-y-0'
-              : 'opacity-0 -translate-y-full pointer-events-none',
-          )}
-          id="mobile-menu"
-          role="dialog"
-          aria-modal="true"
-          aria-label={t('menu')}
-          ref={mobileMenuRef}
-          inert={isMobileMenuOpen ? undefined : true}
-        >
-          <nav className="flex-grow flex flex-col justify-center items-center p-8 space-y-8">
-            {menuItems.map((item, idx) => (
-              <div
-                key={item.href}
-                className={cn(
-                  'transition-all duration-500 transform',
-                  isMobileMenuOpen ? 'opacity-100 translate-y-0' : 'opacity-0 translate-y-8',
-                )}
-                style={{ transitionDelay: `${isMobileMenuOpen ? 200 + idx * 80 : 0}ms` }}
-              >
-                <Link
-                  href={`/${currentLocale}${item.href === '/' ? '' : item.href}`}
-                  aria-current={
-                    (
-                      item.href === '/'
-                        ? pathname === `/${currentLocale}` || pathname === '/'
-                        : pathname.startsWith(`/${currentLocale}${item.href}`)
-                    )
-                      ? 'page'
-                      : undefined
-                  }
-                  onClick={() => {
-                    setIsMobileMenuOpen(false);
-                    trackEvent(AnalyticsEvents.LINK_CLICK, {
-                      label: item.label,
-                      href: item.href,
-                      location: 'mobile_menu',
-                    });
-                  }}
-                  className={cn(
-                    'text-2xl md:text-3xl font-extrabold text-white hover:text-accent transition-all transform block py-4',
-                    (item.href === '/'
-                      ? pathname === `/${currentLocale}` || pathname === '/'
-                      : pathname.startsWith(`/${currentLocale}${item.href}`)) && 'text-accent',
-                  )}
-                >
-                  {item.label}
-                </Link>
-              </div>
-            ))}
-
+      {/* Mobile Menu Overlay */}
+      <div
+        className={cn(
+          'fixed inset-0 bg-primary/95 backdrop-blur-3xl z-[60] lg:hidden transition-all duration-500 ease-in-out flex flex-col',
+          isMobileMenuOpen
+            ? 'opacity-100 translate-y-0'
+            : 'opacity-0 -translate-y-full pointer-events-none',
+        )}
+        id="mobile-menu"
+        role="dialog"
+        aria-modal="true"
+        aria-label={t('menu')}
+        ref={mobileMenuRef}
+        inert={isMobileMenuOpen ? undefined : true}
+      >
+        <nav className="flex-grow flex flex-col justify-center items-center p-8 space-y-8">
+          {menuItems.map((item, idx) => (
             <div
+              key={item.href}
               className={cn(
-                'pt-8 border-t border-white/10 w-full flex flex-col items-center space-y-8 transition-all duration-500',
+                'transition-all duration-500 transform',
                 isMobileMenuOpen ? 'opacity-100 translate-y-0' : 'opacity-0 translate-y-8',
               )}
-              style={{ transitionDelay: isMobileMenuOpen ? '600ms' : '0ms' }}
+              style={{ transitionDelay: `${isMobileMenuOpen ? 200 + idx * 80 : 0}ms` }}
             >
-              <div className="flex items-center space-x-8 text-lg md:text-xl font-extrabold tracking-widest uppercase text-white">
-                <div>
-                  <Link
-                    href={getPathForLocale('en')}
-                    className={`hover:text-accent transition-colors ${currentLocale === 'en' ? 'text-accent' : 'opacity-80'}`}
-                  >
-                    EN
-                  </Link>
-                </div>
-                <div className="w-px h-6 bg-white/30" />
-                <div>
-                  <Link
-                    href={getPathForLocale('de')}
-                    className={`hover:text-accent transition-colors ${currentLocale === 'de' ? 'text-accent' : 'opacity-80'}`}
-                  >
-                    DE
-                  </Link>
-                </div>
-              </div>
+              <Link
+                href={`/${currentLocale}${item.href === '/' ? '' : item.href}`}
+                aria-current={
+                  (
+                    item.href === '/'
+                      ? pathname === `/${currentLocale}` || pathname === '/'
+                      : pathname.startsWith(`/${currentLocale}${item.href}`)
+                  )
+                    ? 'page'
+                    : undefined
+                }
+                onClick={() => {
+                  setIsMobileMenuOpen(false);
+                  trackEvent(AnalyticsEvents.LINK_CLICK, {
+                    label: item.label,
+                    href: item.href,
+                    location: 'mobile_menu',
+                  });
+                }}
+                className={cn(
+                  'text-2xl md:text-3xl font-extrabold text-white hover:text-accent transition-all transform block py-4',
+                  (item.href === '/'
+                    ? pathname === `/${currentLocale}` || pathname === '/'
+                    : pathname.startsWith(`/${currentLocale}${item.href}`)) && 'text-accent',
+                )}
+              >
+                {item.label}
+              </Link>
+            </div>
+          ))}
 
-              <div className="w-full max-w-xs">
-                <Button
-                  href={`/${currentLocale}/${currentLocale === 'de' ? 'kontakt' : 'contact'}`}
-                  variant="accent"
-                  size="lg"
-                  className="w-full py-6 text-lg md:text-xl shadow-2xl hover:scale-105 transition-transform"
+          <div
+            className={cn(
+              'pt-8 border-t border-white/10 w-full flex flex-col items-center space-y-8 transition-all duration-500',
+              isMobileMenuOpen ? 'opacity-100 translate-y-0' : 'opacity-0 translate-y-8',
+            )}
+            style={{ transitionDelay: isMobileMenuOpen ? '600ms' : '0ms' }}
+          >
+            <div className="flex items-center space-x-8 text-lg md:text-xl font-extrabold tracking-widest uppercase text-white">
+              <div>
+                <Link
+                  href={getPathForLocale('en')}
+                  className={`hover:text-accent transition-colors ${currentLocale === 'en' ? 'text-accent' : 'opacity-80'}`}
                 >
-                  {t('contact')}
-                </Button>
+                  EN
+                </Link>
+              </div>
+              <div className="w-px h-6 bg-white/30" />
+              <div>
+                <Link
+                  href={getPathForLocale('de')}
+                  className={`hover:text-accent transition-colors ${currentLocale === 'de' ? 'text-accent' : 'opacity-80'}`}
+                >
+                  DE
+                </Link>
               </div>
             </div>
 
-            {/* Bottom Branding */}
-            <div
-              className={cn(
-                'p-12 flex justify-center transition-all duration-700',
-                isMobileMenuOpen ? 'opacity-20 scale-100' : 'opacity-0 scale-75',
-              )}
-              style={{ transitionDelay: isMobileMenuOpen ? '800ms' : '0ms' }}
-            >
-              <Image src="/logo-white.svg" alt={t('home')} width={80} height={80} unoptimized />
+            <div className="w-full max-w-xs">
+              <Button
+                href={`/${currentLocale}/${currentLocale === 'de' ? 'kontakt' : 'contact'}`}
+                variant="accent"
+                size="lg"
+                className="w-full py-6 text-lg md:text-xl shadow-2xl hover:scale-105 transition-transform"
+              >
+                {t('contact')}
+              </Button>
             </div>
-          </nav>
-        </div>
-      </header>
+          </div>
+
+          {/* Bottom Branding */}
+          <div
+            className={cn(
+              'p-12 flex justify-center transition-all duration-700',
+              isMobileMenuOpen ? 'opacity-20 scale-100' : 'opacity-0 scale-75',
+            )}
+            style={{ transitionDelay: isMobileMenuOpen ? '800ms' : '0ms' }}
+          >
+            <Image src="/logo-white.svg" alt={t('home')} width={80} height={80} unoptimized />
+          </div>
+        </nav>
+      </div>
     </>
   );
 }