[fix] reorganize some modules

components/reader-page/PostCover.tsx

@@ -0,0 +1,14 @@
+export const PostCover = (props: { coverURL: string }) => {
+  return (
+    <div
+      className="mt-0 mb-8 flex w-full justify-center rounded-md"
+      style={{
+        aspectRatio: "5/2",
+        background: `url(${props.coverURL})`,
+        backgroundSize: "cover",
+        backgroundRepeat: "no-repeat",
+        backgroundPosition: "center",
+      }}
+    />
+  );
+};