feat: 默认隐藏空分组

app/src/main/java/io/legado/app/data/repository/BookshelfSettingsRepository.kt

@@ -83,7 +83,7 @@ class BookshelfSettingsRepository : BookshelfSettingsGateway {
 
 private fun Preferences.toBookshelfSettings() = BookshelfSettings(
     bookGroupStyle = compatDsInt(PreferKey.bookGroupStyle) ?: 0,
-    hideEmptyGroups = compatDsBoolean(PreferKey.hideEmptyGroups) ?: false,
+    hideEmptyGroups = compatDsBoolean(PreferKey.hideEmptyGroups) ?: true,
     bookshelfSort = compatDsInt(PreferKey.bookshelfSort) ?: 0,
     bookshelfSortOrder = compatDsInt(PreferKey.bookshelfSortOrder) ?: 1,
     showUnread = compatDsBoolean(PreferKey.showUnread) ?: true,

app/src/main/java/io/legado/app/domain/model/settings/BookshelfSettings.kt

@@ -4,7 +4,7 @@ import io.legado.app.data.entities.BookGroup
 
 data class BookshelfSettings(
     val bookGroupStyle: Int = 0,
-    val hideEmptyGroups: Boolean = false,
+    val hideEmptyGroups: Boolean = true,
     val bookshelfSort: Int = 0,
     val bookshelfSortOrder: Int = 1,
     val showUnread: Boolean = true,