同步上游更改: @lhjgege

新漫画增加墨水屏模式 (#5181)
* 新漫画增加墨水屏模式
* 增加水平滚动动画开关

app/src/main/java/io/legato/kazusa/constant/PreferKey.kt

@@ -104,6 +104,11 @@ object PreferKey {
     const val enableMangaHorizontalScroll = "enableMangaHorizontalScroll"
     const val hideMangaTitle = "hideMangaTitle"
     const val mangaColorFilter = "mangaColorFilter"
+    const val enableMangaEInk = "enableMangaEInk"
+    const val mangaEInkThreshold = "mangaEInkThreshold"
+    const val disableHorizontalAnimator = "disableHorizontalAnimator"
+    const val enableMangaGray = "enableMangaGray"
+
     const val autoRefresh = "auto_refresh"
     const val defaultToRead = "defaultToRead"
     const val exportCharset = "exportCharset"