Implement multi-domain SEO improvements:

- Add metadata to login and login-verify pages to prevent indexing.
- Update robots.txt to disallow additional sensitive paths.
- Enhance sitemap generation to filter by city and include accurate last modified dates.
- Refactor canonical URL generation to support multi-domain architecture, ensuring self-canonicalization for city domains.
- Remove deprecated CanonicalHandler component and streamline canonical URL handling.
- Introduce safe JSON-LD output to prevent XSS vulnerabilities.
- Add payment layout with appropriate metadata to prevent indexing.
- Conduct a comprehensive technical SEO audit and implement necessary fixes across the application.

app/doctor/[slug]/page.js

@@ -1,11 +1,14 @@
 import { cache } from "react";
 import DoctorPage from "@/components/doctor";
 import Layout from "@/components/layout/StLayout";
+import { notFound } from "next/navigation";
 import { getStateInfo } from "@/lib/getStateInfo";
+import { getRequestOrigin } from "@/lib/getCanonicalUrl";
+import { safeJsonLd } from "@/lib/sanitize";
 import { imageUrl } from "@/helper";
 
 const API_URL = process.env.NEXT_PUBLIC_API_URL;
-const FALLBACK_IMG = "https://www.nobat724.com/assets/images/logo.png";
+const FALLBACK_IMG = "https://nobat724.com/assets/images/logo.png";
 
 const getDoctor = cache(async (slug) => {
   try {
@@ -72,10 +75,12 @@ export async function generateMetadata({ params }) {
 
 async function Doctor({ params }) {
   const { slug } = await params;
+  const origin = await getRequestOrigin();
   let comments = null;
   let rateAggregate = { point: 0, satisfaction: 0, averages: [] };
 
   const doctor = await getDoctor(slug);
+  if (!doctor) notFound();
 
   if (doctor) {
     try {
@@ -99,9 +104,9 @@ async function Doctor({ params }) {
     ? {
         "@context": "https://schema.org",
         "@type": "Physician",
-        "@id": `https://www.nobat724.com/doctor/${doctor.uuid}#physician`,
+        "@id": `${origin}/doctor/${doctor.uuid}#physician`,
         name: `دکتر ${doctor.name}`,
-        url: `https://www.nobat724.com/doctor/${doctor.uuid}`,
+        url: `${origin}/doctor/${doctor.uuid}`,
         ...(specialtyNames && { medicalSpecialty: specialtyNames }),
         ...(doctor.img?.[0]?.url && {
           image: {
@@ -155,12 +160,12 @@ async function Doctor({ params }) {
         "@context": "https://schema.org",
         "@type": "BreadcrumbList",
         itemListElement: [
-          { "@type": "ListItem", position: 1, name: "خانه", item: "https://www.nobat724.com" },
+          { "@type": "ListItem", position: 1, name: "خانه", item: origin },
           {
             "@type": "ListItem",
             position: 2,
             name: specialtyLabel,
-            item: `https://www.nobat724.com/doctors?specialty=${encodeURIComponent(specialtyLabel)}`,
+            item: `${origin}/doctors?specialty=${encodeURIComponent(specialtyLabel)}`,
           },
           { "@type": "ListItem", position: 3, name: `دکتر ${doctor.name}` },
         ],
@@ -172,13 +177,13 @@ async function Doctor({ params }) {
       {jsonLd && (
         <script
           type="application/ld+json"
-          dangerouslySetInnerHTML={{ __html: JSON.stringify(jsonLd) }}
+          dangerouslySetInnerHTML={{ __html: safeJsonLd(jsonLd) }}
         />
       )}
       {breadcrumbJsonLd && (
         <script
           type="application/ld+json"
-          dangerouslySetInnerHTML={{ __html: JSON.stringify(breadcrumbJsonLd) }}
+          dangerouslySetInnerHTML={{ __html: safeJsonLd(breadcrumbJsonLd) }}
         />
       )}
       <Layout>