Minor cleanup

app/src/main/java/eu/kanade/tachiyomi/data/backup/models/BackupManga.kt

@@ -79,7 +79,7 @@ data class BackupManga(
                 artist = manga.artist,
                 author = manga.author,
                 description = manga.description,
-                genre = manga.genre ?: emptyList(),
+                genre = manga.genre.orEmpty(),
                 status = manga.status.toInt(),
                 thumbnailUrl = manga.thumbnailUrl,
                 favorite = manga.favorite,

app/src/main/java/eu/kanade/tachiyomi/extension/api/ExtensionGithubApi.kt

@@ -124,7 +124,7 @@ internal class ExtensionGithubApi {
                     isNsfw = it.nsfw == 1,
                     hasReadme = it.hasReadme == 1,
                     hasChangelog = it.hasChangelog == 1,
-                    sources = it.sources?.toExtensionSources() ?: emptyList(),
+                    sources = it.sources?.toExtensionSources().orEmpty(),
                     apkName = it.apk,
                     iconUrl = "${getUrlPrefix()}icon/${it.apk.replace(".apk", ".png")}",
                 )

app/src/main/java/eu/kanade/tachiyomi/ui/browse/extension/details/ExtensionDetailsScreenModel.kt

@@ -173,7 +173,7 @@ data class ExtensionDetailsState(
 ) {
 
     val sources: List<ExtensionSourceItem>
-        get() = _sources ?: emptyList()
+        get() = _sources.orEmpty()
 
     val isLoading: Boolean
         get() = extension == null || _sources == null

app/src/main/java/eu/kanade/tachiyomi/ui/browse/migration/manga/MigrationMangaScreenModel.kt

@@ -64,7 +64,7 @@ data class MigrateMangaState(
 ) {
 
     val titles: List<Manga>
-        get() = titleList ?: emptyList()
+        get() = titleList.orEmpty()
 
     val isLoading: Boolean
         get() = source == null || titleList == null

app/src/main/java/eu/kanade/tachiyomi/ui/browse/source/browse/BrowseSourceScreenModel.kt

@@ -311,7 +311,7 @@ class BrowseSourceScreenModel(
         return getCategories.subscribe()
             .firstOrNull()
             ?.filterNot { it.isSystemCategory }
-            ?: emptyList()
+            .orEmpty()
     }
 
     suspend fun getDuplicateLibraryManga(manga: Manga): Manga? {

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryScreenModel.kt

@@ -355,7 +355,7 @@ class LibraryScreenModel(
                 categories
             }
 
-            displayCategories.associateWith { libraryManga[it.id] ?: emptyList() }
+            displayCategories.associateWith { libraryManga[it.id].orEmpty() }
         }
     }
 
@@ -700,7 +700,7 @@ class LibraryScreenModel(
         }
 
         fun getLibraryItemsByPage(page: Int): List<LibraryItem> {
-            return library.values.toTypedArray().getOrNull(page) ?: emptyList()
+            return library.values.toTypedArray().getOrNull(page).orEmpty()
         }
 
         fun getMangaCountForCategory(category: Category): Int? {

app/src/main/java/eu/kanade/tachiyomi/ui/reader/loader/DirectoryPageLoader.kt

@@ -25,7 +25,8 @@ class DirectoryPageLoader(val file: File) : PageLoader() {
                     stream = streamFn
                     status = Page.State.READY
                 }
-            } ?: emptyList()
+            }
+            .orEmpty()
     }
 
     /**

app/src/main/java/eu/kanade/tachiyomi/widget/MaterialSpinnerView.kt

@@ -57,10 +57,9 @@ class MaterialSpinnerView @JvmOverloads constructor(context: Context, attrs: Att
             val title = getString(R.styleable.MaterialSpinnerView_title).orEmpty()
             binding.title.text = title
 
-            val viewEntries = (
-                getTextArray(R.styleable.MaterialSpinnerView_android_entries)
-                    ?: emptyArray()
-                ).map { it.toString() }
+            val viewEntries = getTextArray(R.styleable.MaterialSpinnerView_android_entries)
+                .orEmpty()
+                .map { it.toString() }
             entries = viewEntries
             binding.details.text = viewEntries.firstOrNull().orEmpty()
         }