macOS: overrode function syncAppearance in order to update the tab bar as well (#13017)

#12949 
I'm unsure about the performance implications of overriding
syncAppearance as opposed to other methods(ie setupKVO or
setupTabGroupObservation) but I found that this shows the tab group
correctly.

macos/Sources/Features/Terminal/Window Styles/TitlebarTabsTahoeTerminalWindow.swift

@@ -51,6 +51,16 @@ class TitlebarTabsTahoeTerminalWindow: TransparentTitlebarTerminalWindow, NSTool
         self.toolbar = toolbar
         toolbarStyle = .unifiedCompact
     }
+    // Called after new tab finishes adjusting and setupTabBar is called in order to prevent Tab Bar hiding/size bug that occurs with some interactions with Mac UI
+    override func syncAppearance(_ surfaceConfig: Ghostty.SurfaceView.DerivedConfig) {
+        super.syncAppearance(surfaceConfig)
+        DispatchQueue.main.async {
+            // HACK: wait a tick before doing anything, to avoid edge cases during startup... :/
+            // If we don't do this then on launch windows with restored state with tabs will end
+            // up with messed up tab bars that don't show all tabs.
+            self.setupTabBar()
+        }
+    }
 
     override func becomeMain() {
         super.becomeMain()