fix(seo): resolve pagespeed insights performance and accessibility issues

- Add priority to hero image and replace css background-image with Next.js Image component for faster LCP
- Add aria-label and aria-expanded to mobile menu button in Navbar
- Add aria-label to social media links in Footer
- Replace css background-image with Next.js Image component in CTA and Services sections

app/[lang]/HomeClient.tsx

@@ -119,10 +119,14 @@ export default function HomeClient({ lang, dict }: { lang: string; dict: any })
 
       {/* ── Hero ── */}
       <section className="relative h-screen flex items-center justify-center overflow-hidden moy-grain">
-        <div
-          className="absolute inset-0 bg-cover bg-center bg-no-repeat scale-105"
-          style={{ backgroundImage: `url(${HERO_BG})` }}
-        >
+        <div className="absolute inset-0 scale-105">
+          <Image
+            src={HERO_BG}
+            alt="Moy Group Hero"
+            fill
+            priority
+            className="object-cover object-center"
+          />
           <div className="absolute inset-0 bg-gradient-to-b from-black/50 via-black/30 to-black/60" />
         </div>
 
@@ -246,9 +250,12 @@ export default function HomeClient({ lang, dict }: { lang: string; dict: any })
                 whileHover={{ y: -10 }}
                 className="group relative h-80 overflow-hidden cursor-pointer"
               >
-                <div
-                  className="absolute inset-0 bg-cover bg-center transition-transform duration-700 group-hover:scale-110"
-                  style={{ backgroundImage: `url(${service.bg})` }}
+                <Image
+                  src={service.bg}
+                  alt={service.title}
+                  fill
+                  sizes="(max-width: 768px) 100vw, (max-width: 1200px) 50vw, 20vw"
+                  className="absolute inset-0 object-cover object-center transition-transform duration-700 group-hover:scale-110"
                 />
                 <div className="absolute inset-0 bg-gradient-to-t from-[var(--color-moy-dark)] via-[var(--color-moy-dark)]/50 to-transparent" />
 
@@ -380,12 +387,14 @@ export default function HomeClient({ lang, dict }: { lang: string; dict: any })
 
       {/* ── CTA Banner ── */}
       <section className="relative py-32 overflow-hidden bg-[var(--color-moy-dark)]">
-        <div
-          className="absolute inset-0 bg-cover bg-center opacity-20"
-          style={{
-            backgroundImage: `url(https://images.unsplash.com/photo-1507525428034-b723cf961d3e?auto=format&fit=crop&q=60&w=1600)`,
-          }}
-        />
+        <div className="absolute inset-0 opacity-20">
+          <Image
+            src="https://images.unsplash.com/photo-1507525428034-b723cf961d3e?auto=format&fit=crop&q=60&w=1600"
+            alt="Moy Group CTA Background"
+            fill
+            className="object-cover object-center"
+          />
+        </div>
         <div className="absolute inset-0 bg-gradient-to-r from-[var(--color-moy-dark)] via-transparent to-[var(--color-moy-dark)]" />
 
         <div className="relative max-w-3xl mx-auto px-6 text-center">

app/components/Footer.tsx

@@ -15,10 +15,10 @@ export default function Footer({ lang, dict }: { lang: Locale; dict: any }) {
               {dict.description}
             </p>
             <div className="flex gap-4 pt-4">
-              <a href="#" className="text-gray-400 hover:text-[var(--color-moy-gold)] transition-colors">
+              <a href="#" aria-label="Instagram" className="text-gray-400 hover:text-[var(--color-moy-gold)] transition-colors">
                 <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><rect width="20" height="20" x="2" y="2" rx="5" ry="5" /><path d="M16 11.37A4 4 0 1 1 12.63 8 4 4 0 0 1 16 11.37z" /><line x1="17.5" x2="17.51" y1="6.5" y2="6.5" /></svg>
               </a>
-              <a href="#" className="text-gray-400 hover:text-[var(--color-moy-gold)] transition-colors">
+              <a href="#" aria-label="Facebook" className="text-gray-400 hover:text-[var(--color-moy-gold)] transition-colors">
                 <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><path d="M18 2h-3a5 5 0 0 0-5 5v3H7v4h3v8h4v-8h3l1-4h-4V7a1 1 0 0 1 1-1h3z" /></svg>
               </a>
             </div>

app/components/Navbar.tsx

@@ -80,6 +80,8 @@ export default function Navbar({ lang, dict }: { lang: Locale; dict: any }) {
 
           {/* Mobile menu button */}
           <button
+            aria-label={mobileMenuOpen ? "Menüyü kapat" : "Menüyü aç"}
+            aria-expanded={mobileMenuOpen}
             className="md:hidden text-white"
             onClick={() => setMobileMenuOpen(!mobileMenuOpen)}
           >