feat: Revert homepage changes, fix Persian slug 404, and make various article and about us adjustments

- Removed the newly added city-focused section from the homepage.
- Fixed 404 error for Persian slugs in specialties and blog pages by implementing a decode helper.
- Removed the "مخصوص شهر" label from article headers.
- Linked article tags to their respective filter pages.
- Adjusted related content images to prevent distortion.
- Added a section in the "About Us" page for physician registration guidance.
- Updated the logo in the "About Us" header to the correct version.
- Added tests for the new functionality and ensured existing tests are updated accordingly.

app/blog/[slug]/page.js

@@ -11,6 +11,7 @@ import {
   findCityById,
 } from "@/lib/domainHelpers";
 import { safeJsonLd } from "@/lib/sanitize";
+import { decodeRouteParam } from "@/lib/routeParams";
 import { normalizeBlog, blogCover } from "@/helper";
 
 const API_URL = process.env.NEXT_PUBLIC_API_URL;
@@ -39,7 +40,8 @@ async function getScopedBlog(slug) {
 }
 
 export async function generateMetadata({ params }) {
-  const { slug } = await params;
+  const { slug: rawSlug } = await params;
+  const slug = decodeRouteParam(rawSlug);
   const { matchedCity } = await getStateInfo();
   const siteName = matchedCity?.site_name || "نوبت 724";
 
@@ -82,7 +84,9 @@ export async function generateMetadata({ params }) {
     // دامنه سرو می‌شد و هرکدام خودش را canonical اعلام می‌کرد.
     // فیلد canonical_url اختصاصی (مثلاً نسخهٔ شهریِ پایپ‌لاین) مقدم است.
     const origin = getBlogCanonicalOrigin(extractEntityCityId(blog));
-    const canonical = blog.canonical_url || `${origin}/blog/${slug}`;
+    // slug اینجا decode شده است؛ canonical باید شکل درصدی را بدهد وگرنه روی
+    // اسلاگ فارسی یک URL با کاراکتر غیر ASCII منتشر می‌شود.
+    const canonical = blog.canonical_url || `${origin}/blog/${encodeURIComponent(slug)}`;
 
     return {
       title,
@@ -115,7 +119,9 @@ export async function generateMetadata({ params }) {
 }
 
 async function Blog({ params }) {
-  const { slug } = await params;
+  const { slug: rawSlug } = await params;
+  const slug = decodeRouteParam(rawSlug);
+  const slugPath = encodeURIComponent(slug);
 
   const blog = normalizeBlog(await getScopedBlog(slug));
   if (!blog) notFound();
@@ -165,7 +171,7 @@ async function Blog({ params }) {
         headline: blog.title,
         ...(articleDescription && { description: articleDescription }),
         image: blogCover(blog),
-        mainEntityOfPage: { "@type": "WebPage", "@id": `${origin}/blog/${slug}` },
+        mainEntityOfPage: { "@type": "WebPage", "@id": `${origin}/blog/${slugPath}` },
         ...(blog.created && {
           datePublished: new Date(blog.created * 1000).toISOString(),
         }),
@@ -216,7 +222,7 @@ async function Blog({ params }) {
             : []),
           // آیتم آخر بدون `item` کل BreadcrumbList را نامعتبر می‌کند
           { "@type": "ListItem", position: categoryName ? 4 : 3, name: blog.title,
-            item: `${origin}/blog/${slug}` },
+            item: `${origin}/blog/${slugPath}` },
         ],
       }
     : null;
@@ -242,7 +248,7 @@ async function Blog({ params }) {
         />
       )}
       <Layout>
-        <BlogPage blog={blog} blogs={relatedBlogs} cityName={blogCity?.name} />
+        <BlogPage blog={blog} blogs={relatedBlogs} />
       </Layout>
     </>
   );

app/specialties/[slug]/page.js

@@ -10,6 +10,7 @@ import { buildSpecialtyFaq, buildSpecialtyIntro } from "@/lib/specialtyContent";
 import { isCategorySpecialty } from "@/lib/specialtyIndexing";
 import { safeJsonLd } from "@/lib/sanitize";
 import { fetchReq } from "@/lib/req";
+import { decodeRouteParam } from "@/lib/routeParams";
 import { isNextRedirectError } from "@/lib/maintenance";
 
 const API_URL = process.env.NEXT_PUBLIC_API_URL;
@@ -42,7 +43,8 @@ const getDoctors = cache(async (specialtyId, cityId) => {
 });
 
 export async function generateMetadata({ params }) {
-  const { slug } = await params;
+  const { slug: rawSlug } = await params;
+  const slug = decodeRouteParam(rawSlug);
   const specialty = findSpecialty(slug);
   if (!specialty) notFound();
 
@@ -73,7 +75,8 @@ export async function generateMetadata({ params }) {
 }
 
 async function SpecialtyDetail({ params }) {
-  const { slug } = await params;
+  const { slug: rawSlug } = await params;
+  const slug = decodeRouteParam(rawSlug);
   const specialty = findSpecialty(slug);
   if (!specialty) notFound();