Change fetch interval action to show days until next expected update

(cherry picked from commit 32bed9b041d76a6bac699c56c78d1692b71dfc0b)

# Conflicts:
#	app/src/main/java/eu/kanade/presentation/manga/MangaScreen.kt
#	domain/src/main/java/tachiyomi/domain/manga/model/Manga.kt

domain/src/main/java/tachiyomi/domain/manga/model/Manga.kt

@@ -1,10 +1,12 @@
 package tachiyomi.domain.manga.model
 
+import eu.kanade.tachiyomi.source.model.SManga
 import eu.kanade.tachiyomi.source.model.UpdateStrategy
 import tachiyomi.core.preference.TriState
 import tachiyomi.domain.manga.interactor.GetCustomMangaInfo
 import uy.kohesive.injekt.injectLazy
 import java.io.Serializable
+import java.time.Instant
 
 data class Manga(
     val id: Long,
@@ -59,6 +61,11 @@ data class Manga(
         get() = customMangaInfo?.status ?: ogStatus
     // SY <--
 
+    val expectedNextUpdate: Instant?
+        get() = nextUpdate
+            .takeIf { status != SManga.COMPLETED.toLong() }
+            ?.let { Instant.ofEpochMilli(it) }
+
     val sorting: Long
         get() = chapterFlags and CHAPTER_SORTING_MASK