refactor(specialties): simplify specialty link generation logic

components/specialties/list/ItemSpecialties.js

@@ -1,17 +1,26 @@
 import Link from "next/link";
 
+import specialtiesData from "@/data/specialties.json";
+
+// slug تمیز از data/specialties.json؛ اگر تخصصی slug نداشت، به کوئری قدیمی برمی‌گردیم.
+function specialtyHref(data, cityName, stateName) {
+  const slug = data.slug || specialtiesData.find((s) => s.id === data.id)?.slug;
+  if (slug) return `/specialties/${slug}`;
+  return {
+    pathname: "/doctors",
+    query: {
+      specialty: data.name,
+      ...(cityName && { city: cityName }),
+      ...(stateName && { state: stateName }),
+    },
+  };
+}
+
 function ItemSpecialties({ data, cityName, stateName }) {
   return (
     <li>
       <Link
-        href={{
-          pathname: "/doctors",
-          query: {
-            specialty: data.name,
-            ...(cityName && { city: cityName }),
-            ...(stateName && { state: stateName }),
-          },
-        }}
+        href={specialtyHref(data, cityName, stateName)}
         className="py-[17.5px] px-[12px] flex flex-col justify-center items-center gap-[16px] rounded-lg bg-[#FFF] shadow-[0px_1px_24.8px_0px_rgba(204,_204,_204,_0.18)] hover:bg-[#5559CE] transition-all text-item-head-white duration-500 cursor-pointer hover-mode-item-speciality"
       >
         <h2 className="text-[#3B3B3B] item-head text-[16px] font-bold text-center">