macos: newTab needs to call Controller.showWindow

macos/Sources/Features/Terminal/TerminalManager.swift

@@ -122,6 +122,11 @@ class TerminalManager {
             tg.removeWindow(window)
         }
         
+        // Our windows start our invisible. We need to make it visible. If we
+        // don't do this then various features such as window blur won't work because
+        // the macOS APIs only work on a visible window.
+        controller.showWindow(self)
+        
         // Add the window to the tab group and show it
         parent.addTabbedWindow(window, ordered: .above)
         window.makeKeyAndOrderFront(self)

macos/Sources/Ghostty/SurfaceView.swift

@@ -486,7 +486,7 @@ extension Ghostty {
                 cursorUpdate(with: NSEvent())
             }
         }
-
+        
         override func viewDidMoveToWindow() {
             guard let window = self.window else { return }
             guard let surface = self.surface else { return }