Exclude generated files when copying to Draft

Author: YiHanCA

Planet.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved

@@ -150,7 +150,7 @@ class DraftModel: Identifiable, Equatable, Hashable, Codable, ObservableObject {
         )
         draft.attachments = try publicArticleFiles
             // exclude index.html, article.json
-            .filter { !["index.html", "article.json"].contains($0.lastPathComponent) }
+            .filter { !["index.html", "article.json", "_videoThumbnail.png", "_grid.jpg", "_grid.png"].contains($0.lastPathComponent) }
             .map { filePath in
                 let attachment = Attachment(name: filePath.lastPathComponent, type: AttachmentType.from(filePath))
                 attachment.draft = draft