fix: discard overlay segment from ZIP container when saving stories

app/src/main/kotlin/me/eternal/purrfectsnap/download/DownloadProcessor.kt

@@ -623,6 +623,7 @@ class DownloadProcessor (
 
                         zipFile.inputStream().use { zipFileInputStream ->
                             MediaDownloaderHelper.getSplitElements(zipFileInputStream) { type, inputStream ->
+                                if (type == SplitMediaAssetType.OVERLAY) return@getSplitElements
                                 createMediaTempFile().apply {
                                     outputStream().use {
                                         inputStream.copyTo(it)
@@ -631,7 +632,7 @@ class DownloadProcessor (
                                     downloadedMedias[InputMedia(
                                         type = DownloadMediaType.LOCAL_MEDIA,
                                         content = it.absolutePath,
-                                        isOverlay = type == SplitMediaAssetType.OVERLAY
+                                        isOverlay = false
                                     )] = it
                                 }
                             }
@@ -640,8 +641,6 @@ class DownloadProcessor (
                         oldDownloadedMedias.forEach { (_, value) ->
                             value.delete()
                         }
-
-                        shouldMergeOverlay = true
                     }
 
                     if (shouldMergeOverlay) {