Remove replacement characters from manga description

app/src/main/kotlin/org/koitharu/kotatsu/core/util/ext/String.kt

@@ -35,3 +35,9 @@ fun String.almostEquals(other: String, @FloatRange(from = 0.0) threshold: Float)
 	val diff = lowercase().levenshteinDistance(other.lowercase()) / ((length + other.length) / 2f)
 	return diff < threshold
 }
+
+fun CharSequence.sanitize(): CharSequence {
+	return filterNot { c -> c.isReplacement() }
+}
+
+fun Char.isReplacement() = this in '\uFFF0'..'\uFFFF'

app/src/main/kotlin/org/koitharu/kotatsu/details/ui/DetailsViewModel.kt

@@ -37,6 +37,7 @@ import org.koitharu.kotatsu.core.util.ext.MutableEventFlow
 import org.koitharu.kotatsu.core.util.ext.call
 import org.koitharu.kotatsu.core.util.ext.computeSize
 import org.koitharu.kotatsu.core.util.ext.requireValue
+import org.koitharu.kotatsu.core.util.ext.sanitize
 import org.koitharu.kotatsu.core.util.ext.toFileOrNull
 import org.koitharu.kotatsu.details.domain.BranchComparator
 import org.koitharu.kotatsu.details.domain.DetailsInteractor
@@ -135,7 +136,7 @@ class DetailsViewModel @Inject constructor(
 			if (description.isNullOrEmpty()) {
 				emit(null)
 			} else {
-				emit(description.parseAsHtml().filterSpans())
+				emit(description.parseAsHtml().filterSpans().sanitize())
 				emit(description.parseAsHtml(imageGetter = imageGetter).filterSpans())
 			}
 		}.stateIn(viewModelScope + Dispatchers.Default, SharingStarted.WhileSubscribed(5000), null)

app/src/main/kotlin/org/koitharu/kotatsu/details/ui/scrobbling/ScrobblingInfoSheet.kt

@@ -23,6 +23,7 @@ import org.koitharu.kotatsu.core.util.ext.getDisplayMessage
 import org.koitharu.kotatsu.core.util.ext.newImageRequest
 import org.koitharu.kotatsu.core.util.ext.observe
 import org.koitharu.kotatsu.core.util.ext.observeEvent
+import org.koitharu.kotatsu.core.util.ext.sanitize
 import org.koitharu.kotatsu.core.util.ext.scaleUpActivityOptionsOf
 import org.koitharu.kotatsu.core.util.ext.withArgs
 import org.koitharu.kotatsu.databinding.SheetScrobblingBinding
@@ -122,7 +123,7 @@ class ScrobblingInfoSheet :
 		}
 		requireViewBinding().textViewTitle.text = scrobbling.title
 		requireViewBinding().ratingBar.rating = scrobbling.rating * requireViewBinding().ratingBar.numStars
-		requireViewBinding().textViewDescription.text = scrobbling.description
+		requireViewBinding().textViewDescription.text = scrobbling.description?.sanitize()
 		requireViewBinding().spinnerStatus.setSelection(scrobbling.status?.ordinal ?: -1)
 		requireViewBinding().imageViewLogo.contentDescription = getString(scrobbling.scrobbler.titleResId)
 		requireViewBinding().imageViewLogo.setImageResource(scrobbling.scrobbler.iconResId)

app/src/main/kotlin/org/koitharu/kotatsu/scrobbling/common/domain/Scrobbler.kt

@@ -11,6 +11,7 @@ import kotlinx.coroutines.flow.flow
 import kotlinx.coroutines.flow.map
 import org.koitharu.kotatsu.core.db.MangaDatabase
 import org.koitharu.kotatsu.core.util.ext.findKeyByValue
+import org.koitharu.kotatsu.core.util.ext.sanitize
 import org.koitharu.kotatsu.parsers.model.MangaChapter
 import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
 import org.koitharu.kotatsu.scrobbling.common.data.ScrobblingEntity
@@ -123,7 +124,7 @@ abstract class Scrobbler(
 			rating = rating,
 			title = mangaInfo.name,
 			coverUrl = mangaInfo.cover,
-			description = mangaInfo.descriptionHtml.parseAsHtml(),
+			description = mangaInfo.descriptionHtml.parseAsHtml().sanitize(),
 			externalUrl = mangaInfo.url,
 		)
 	}

app/src/main/kotlin/org/koitharu/kotatsu/suggestions/ui/SuggestionsWorker.kt

@@ -41,6 +41,7 @@ import org.koitharu.kotatsu.core.prefs.AppSettings
 import org.koitharu.kotatsu.core.util.ext.almostEquals
 import org.koitharu.kotatsu.core.util.ext.asArrayList
 import org.koitharu.kotatsu.core.util.ext.flatten
+import org.koitharu.kotatsu.core.util.ext.sanitize
 import org.koitharu.kotatsu.core.util.ext.takeMostFrequent
 import org.koitharu.kotatsu.core.util.ext.toBitmapOrNull
 import org.koitharu.kotatsu.core.util.ext.trySetForeground
@@ -227,7 +228,7 @@ class SuggestionsWorker @AssistedInject constructor(
 				).toBitmapOrNull(),
 			)
 			setSmallIcon(R.drawable.ic_stat_suggestion)
-			val description = manga.description?.parseAsHtml(HtmlCompat.FROM_HTML_MODE_COMPACT)
+			val description = manga.description?.parseAsHtml(HtmlCompat.FROM_HTML_MODE_COMPACT)?.sanitize()
 			if (!description.isNullOrBlank()) {
 				val style = NotificationCompat.BigTextStyle()
 				style.bigText(