优化

app/src/main/java/io/legado/app/model/CacheBook.kt

@@ -37,6 +37,7 @@ object CacheBook {
         var cacheBook = cacheBookMap[bookUrl]
         if (cacheBook != null) {
             //存在时更新,书源可能会变化,必须更新
+            cacheBook.bookSource = bookSource
             cacheBook.book = book
             return cacheBook
         }
@@ -51,6 +52,7 @@ object CacheBook {
         var cacheBook = cacheBookMap[book.bookUrl]
         if (cacheBook != null) {
             //存在时更新,书源可能会变化,必须更新
+            cacheBook.bookSource = bookSource
             cacheBook.book = book
             return cacheBook
         }