Fix inconsistent json in Nekopost (#10336)

src/th/nekopost/build.gradle

@@ -6,7 +6,7 @@ ext {
     extName = 'Nekopost'
     pkgNameSuffix = 'th.nekopost'
     extClass = '.Nekopost'
-    extVersionCode = 6
+    extVersionCode = 7
     isNsfw = true
 }
 

src/th/nekopost/src/eu/kanade/tachiyomi/extension/th/nekopost/Nekopost.kt

@@ -141,9 +141,10 @@ class Nekopost : ParsedHttpSource() {
                 val chapterInfo: RawChapterInfo = json.decodeFromString(responseBody.string())
 
                 chapterInfo.pageItem.map { page ->
+                    val fileName = page.fileName ?: page.pageName
                     Page(
                         index = page.pageNo,
-                        imageUrl = "$fileHost/collectManga/${chapterInfo.projectId}/${chapterInfo.chapterId}/${page.fileName}",
+                        imageUrl = "$fileHost/collectManga/${chapterInfo.projectId}/${chapterInfo.chapterId}/$fileName",
                     )
                 }
             }

src/th/nekopost/src/eu/kanade/tachiyomi/extension/th/nekopost/model/RawPageItem.kt

@@ -4,7 +4,10 @@ import kotlinx.serialization.Serializable
 
 @Serializable
 data class RawPageItem(
-    val fileName: String,
+    val id: Int? = null,
+    // workaround for https://github.com/Kotlin/kotlinx.serialization/pull/1473
+    val fileName: String? = null,
+    val pageName: String? = null,
     val height: Int,
     val pageNo: Int,
     val width: Int