优化

app/src/main/java/io/legado/app/base/adapter/DiffRecyclerAdapter.kt

@@ -146,7 +146,7 @@ abstract class DiffRecyclerAdapter<ITEM, VB : ViewBinding>(protected val context
     final override fun onBindViewHolder(holder: ItemViewHolder, position: Int) {}
 
     open fun onCurrentListChanged() {
-
+        //可继承
     }
 
     @Suppress("UNCHECKED_CAST")

app/src/main/java/io/legado/app/ui/book/changecover/ChangeCoverViewModel.kt

@@ -37,7 +37,7 @@ class ChangeCoverViewModel(application: Application) : BaseViewModel(application
         searchSuccess = {
             if (!searchBooks.contains(it)) {
                 searchBooks.add(it)
-                trySend(searchBooks)
+                trySend(ArrayList(searchBooks))
             }
         }