Work around the hang due to infinite layout shifts

MastodonSDK/Sources/MastodonUI/Scene/ComposeContent/ComposeContentViewModel+DataSource.swift

@@ -37,6 +37,7 @@ extension ComposeContentViewModel {
         $contentCellFrame
             .map { $0.height }
             .removeDuplicates()
+            .throttle(for: 0.5, scheduler: RunLoop.main, latest: true)
             .sink { [weak self] height in
                 guard let self = self else { return }
                 guard !tableView.visibleCells.isEmpty else { return }

MastodonSDK/Sources/MastodonUI/Scene/ComposeContent/View/ComposeContentView.swift

@@ -83,6 +83,7 @@ public struct ComposeContentView: View {
                 authorView
                     .padding(.top, 14)
                     .padding(.horizontal, ComposeContentView.margin)
+                    .fixedSize(horizontal: false, vertical: true)
                 // content editor
                 MetaTextViewRepresentable(
                     string: $viewModel.content,