fixed category navigation (#425)

* fix-category-navigation

* removed unwanted comments

Author: kh-ub-ayb

src/pages/News/NewsDetailPage.tsx

@@ -87,12 +87,14 @@ const NewsDetailPage: React.FC = () => {
 
   const handleGoBack = useCallback(() => {
     const search = location.search || '';
-    if (category) {
-      navigate(`/news/${category}${search}`);
-    } else {
-      navigate(`/news/community-news${search}`);
-    }
-  }, [navigate, category, location.search]);
+    // Prefer the category in the URL. If absent, derive from the post's category; fallback to 'all'.
+    const derivedCategory = category
+      ? category
+      : post?.category
+        ? post.category.toLowerCase().replace(/\s+/g, '-')
+        : 'all';
+    navigate(`/news/${derivedCategory}${search}`);
+  }, [navigate, category, location.search, post?.category]);
 
   const closeImageModal = useCallback(() => {
     setModalImage(null);

src/pages/News/NewsPage.tsx

@@ -68,6 +68,7 @@ const NewsPage: React.FC = () => {
   }, []);
 
   useEffect(() => {
+    if (!categories.length) return;
     if (categoryParam) {
       const formatted = categoryParam.toLowerCase().replace(/-/g, ' ').trim();
       const match = categories.find((cat) => cat.toLowerCase() === formatted);
@@ -87,14 +88,15 @@ const NewsPage: React.FC = () => {
   }, [location.search]);
 
   useEffect(() => {
+    if (!categories.length) return;
     const pathCat =
       activeCategory === 'All'
         ? 'all'
         : activeCategory.toLowerCase().replace(/\s+/g, '-');
     const query = searchTerm ? `?q=${encodeURIComponent(searchTerm)}` : '';
     navigate(`/news/${pathCat}${query}`, { replace: true });
     setDisplayCount(6);
-  }, [activeCategory, navigate, searchTerm]);
+  }, [activeCategory, navigate, searchTerm, categories.length]);
 
   const sortedCategories = useMemo(() => {
     const others = categories