feat: add canonical URL handling and entity quality checks

- Implemented canonical URL strategies for city-specific domains and entities.
- Added helper functions for domain and city resolution.
- Created tests for canonical URL generation and domain resolution.
- Introduced entity quality checks for doctors and clinics to ensure meaningful content.
- Developed unique introductory texts for listing pages to avoid duplicate content.
- Established robots.txt policies for listing pages to manage indexing based on user filters.
- Enhanced specialty content with dynamic introductions and FAQs to improve SEO.

components/clinics/index.js

@@ -12,6 +12,8 @@ import { useSearchParams } from "next/navigation";
 import states from "@/data/state.json";
 import cities from "@/data/city.json";
 import { isRootCity } from "@/lib/rootCity";
+import { resolveCityDisplayName } from "@/lib/domainHelpers";
+import { buildClinicsIntro } from "@/lib/listingIntro";
 
 function ClinicsPage({ clinics, matchedCity, matchedState }) {
   const searchParams = useSearchParams();
@@ -35,7 +37,7 @@ function ClinicsPage({ clinics, matchedCity, matchedState }) {
   return (
     <div>
       <HeadPageList
-        title="لیست کلینیک ها و درمانگاه های تخصصی"
+        title={`کلینیک‌ها و مراکز درمانی ${resolveCityDisplayName(matchedCity)}`}
         detail="در قسمت زیر می توانید کلینیک مورد نظر خود را جستجو نمایید"
       >
         <SearchBar
@@ -48,6 +50,11 @@ function ClinicsPage({ clinics, matchedCity, matchedState }) {
           setFilteredClinics={setFilteredClinics}
         />
       </HeadPageList>
+      <div className="padding-responsive pt-[24px]">
+        <p className="text-[#525252] text-[14px] md:text-[16px] font-normal leading-8 text-justify">
+          {buildClinicsIntro(resolveCityDisplayName(matchedCity))}
+        </p>
+      </div>
       <List
         limit={12}
         page={page}