refactor: Simplify LazyImage component by removing unnecessary state and optimizing IntersectionObserver usage; enhance test setup with improved window.location mock

src/components/ui/LazyImage.tsx

@@ -23,7 +23,6 @@ export function LazyImage({
   ...props
 }: LazyImageProps) {
   const [isLoaded, setIsLoaded] = useState(false)
-  const [isInView, setIsInView] = useState(priority)
   const [error, setError] = useState(false)
   const imgRef = useRef<HTMLImageElement>(null)
   const [imageSrc, setImageSrc] = useState(priority ? src : placeholder)
@@ -35,14 +34,12 @@ export function LazyImage({
     const observer = new IntersectionObserver(
       ([entry]) => {
         if (entry.isIntersecting) {
-          setIsInView(true)
           setImageSrc(src)
           observer.disconnect()
         }
       },
       { rootMargin: '50px' }
     )
-
     const currentImg = imgRef.current
     if (currentImg) {
       observer.observe(currentImg)

src/test/setup.ts

@@ -58,10 +58,21 @@ Object.defineProperty(window, 'localStorage', {
 
 // Mock window.location
 delete (window as any).location
-window.location = {
-  ...window.location,
-  hash: '#/',
-  pathname: '/',
-  search: '',
-  href: 'http://localhost:3000/',
-}
+
+Object.defineProperty(window, 'location', {
+  writable: true,
+  value: {
+    ...window.location,
+    hash: '#/',
+    pathname: '/',
+    get search() {
+      return '';
+    },
+    get href() {
+      return 'http://localhost:3000/';
+    },
+    assign: vi.fn(),
+    replace: vi.fn(),
+    reload: vi.fn(),
+  },
+});