Add SEO metadata and fix mobile horizontal overflow.

Prevent homepage layout shift on small screens by constraining the hero aspect box and service/product carousels.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/app/solutions/hvac/page.tsx

@@ -1,10 +1,14 @@
 import { Footer } from "@/components/Footer";
 import { Header } from "@/components/Header";
 import { PageHero, UpdatingNotice } from "@/components/PageShared";
+import type { Metadata } from "next";
+import { pageMetadata } from "@/lib/seo";
 
-export const metadata = {
-  title: "تهویه مطبوع | هواران",
-};
+export const metadata: Metadata = pageMetadata({
+  title: "تهویه مطبوع",
+  description: "سیستم‌های تهویه مطبوع برای فضاهای مسکونی، اداری و تجاری",
+  path: "/solutions/hvac",
+});
 
 export default function HvacSolutionPage() {
   return (