fix: manhwa scroll unloading pages

apps/NwaifuAnime/src/app/components/reader/reader.component.ts

@@ -166,7 +166,9 @@ export class ReaderComponent implements OnInit, OnDestroy {
 
   private clearCache(index: number) {
     for (let i = 0; i <= index; i++) {
+      const imgUrl = this.cachedPages.get(i)!.imageUrl;
       this.cachedPages.get(i)!.imageUrl = "";
+      URL.revokeObjectURL(imgUrl);
     }
   }
 

apps/NwaifuAnime/src/app/components/scale-image/scale-image.component.ts

@@ -34,7 +34,7 @@ export class ScaleImageComponent implements AfterViewInit, OnDestroy {
         ([entry]) => entry.isIntersecting && this.view.emit(),
         {
           root: this.hostScrollable ? this.host.nativeElement : null,
-          rootMargin: "700px",
+          rootMargin: "100px",
         },
       );
       if (this.containerRef) this.observer.observe(this.containerRef.nativeElement);