feat: simplify navigation and add RU/EN home and contacts

- simplify main navigation and hide extra menu items
- make home page more sales-focused with updated hero, benefits and fleet teaser
- add RU/EN handling for home and contacts, including SEO defaults
- integrate basic Strapi homepage API client (no breaking changes)
- update contacts page with messenger buttons and dynamic footer year

Made-with: Cursor

components/PageHeader.tsx

@@ -4,12 +4,14 @@ interface PageHeaderProps {
     title: string;
     description?: string;
     image?: string;
+    children?: React.ReactNode;
 }
 
 const PageHeader: React.FC<PageHeaderProps> = ({ 
     title, 
     description,
-    image = "/media/images/headers/header-about.png"
+    image = "/media/images/headers/header-about.png",
+    children,
 }) => {
   return (
     <div className="relative w-full h-[400px] md:h-[500px] bg-brand-dark text-white flex flex-col justify-center items-center text-center overflow-hidden">
@@ -22,13 +24,14 @@ const PageHeader: React.FC<PageHeaderProps> = ({
         <div className="absolute inset-0 bg-gradient-to-b from-brand-dark/80 to-brand-dark/40" />
       </div>
 
-      <div className="relative z-10 container mx-auto px-6 mt-16">
+      <div className="relative z-10 container mx-auto px-6 mt-16 flex flex-col items-center">
         <h1 className="text-4xl md:text-5xl lg:text-6xl font-bold mb-6">{title}</h1>
         {description && (
-            <p className="text-gray-300 text-lg max-w-2xl mx-auto leading-relaxed">
+            <p className="text-gray-300 text-lg max-w-2xl mx-auto leading-relaxed mb-6">
                 {description}
             </p>
         )}
+        {children}
       </div>
     </div>
   );