fix: visibility missing bind back to source issue

MastodonSDK/Sources/MastodonUI/Scene/ComposeContent/ComposeContentViewController.swift

@@ -334,9 +334,21 @@ extension ComposeContentViewController {
         viewModel.$isPollActive.assign(to: &composeContentToolbarViewModel.$isPollActive)
         viewModel.$isEmojiActive.assign(to: &composeContentToolbarViewModel.$isEmojiActive)
         viewModel.$isContentWarningActive.assign(to: &composeContentToolbarViewModel.$isContentWarningActive)
+        viewModel.$visibility.assign(to: &composeContentToolbarViewModel.$visibility)
         viewModel.$maxTextInputLimit.assign(to: &composeContentToolbarViewModel.$maxTextInputLimit)
         viewModel.$contentWeightedLength.assign(to: &composeContentToolbarViewModel.$contentWeightedLength)
         viewModel.$contentWarningWeightedLength.assign(to: &composeContentToolbarViewModel.$contentWarningWeightedLength)
+        
+        // bind back to source due to visibility not update via delegate
+        composeContentToolbarViewModel.$visibility
+            .dropFirst()
+            .sink { [weak self] visibility in
+                guard let self = self else { return }
+                if self.viewModel.visibility != visibility {
+                    self.viewModel.visibility = visibility
+                }
+            }
+            .store(in: &disposeBag)
     }
     
     private func updateAutoCompleteViewControllerLayout() {