feat: implement programmatic SEO solutions hub

- Add /solutions hub page with 10 category cards
- Add /solutions/by-concern directory page
- Add /solutions/by-oil directory page
- Add Solutions section to Footer with navigation links
- Add Breadcrumb component for solution pages
- Add translations for all solution pages (sr, en, de, fr)
- Fix ExitIntentDetector JSON parsing error
- Update sitemap with solution pages
- Create 3 sample solution pages with data files

src/app/sitemap.ts

@@ -1,5 +1,6 @@
 import { MetadataRoute } from "next";
 import { getProducts, filterOutBundles } from "@/lib/saleor";
+import { getAllOilForConcernPages } from "@/lib/programmatic-seo/dataLoader";
 import { SUPPORTED_LOCALES, type Locale } from "@/lib/i18n/locales";
 
 const baseUrl = process.env.NEXT_PUBLIC_SITE_URL || "https://manoonoils.com";
@@ -105,5 +106,35 @@ export default async function sitemap(): Promise<SitemapEntry[]> {
     }
   }
 
-  return [...staticPages, ...productUrls];
+  let solutionPages: any[] = [];
+  try {
+    solutionPages = await getAllOilForConcernPages();
+  } catch (e) {
+    console.log("Failed to fetch solution pages for sitemap during build");
+  }
+
+  const solutionUrls: SitemapEntry[] = [];
+
+  for (const page of solutionPages) {
+    const hreflangs: Record<string, string> = {};
+    for (const locale of SUPPORTED_LOCALES) {
+      const path = locale === "sr" ? `/solutions/${page.slug}` : `/${locale}/solutions/${page.slug}`;
+      hreflangs[locale] = `${baseUrl}${path}`;
+    }
+
+    for (const locale of SUPPORTED_LOCALES) {
+      const localePrefix = locale === "sr" ? "" : `/${locale}`;
+      solutionUrls.push({
+        url: `${baseUrl}${localePrefix}/solutions/${page.slug}`,
+        lastModified: new Date(),
+        changeFrequency: "monthly",
+        priority: 0.7,
+        alternates: {
+          languages: hreflangs,
+        },
+      });
+    }
+  }
+
+  return [...staticPages, ...productUrls, ...solutionUrls];
 }