macOS: double click title to enlarge window (#12219)

Previously with `macos-titlebar-style = tabs`, double clicking title
would do nothing

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

@@ -241,11 +241,11 @@ class TitlebarTabsTahoeTerminalWindow: TransparentTitlebarTerminalWindow, NSTool
         switch itemIdentifier {
         case .title:
             let item = NSToolbarItem(itemIdentifier: .title)
-            item.view = NSHostingView(rootView: TitleItem(viewModel: viewModel))
+            item.view = ClickThroughHostingView(rootView: TitleItem(viewModel: viewModel))
             // Fix: https://github.com/ghostty-org/ghostty/discussions/9027
             item.view?.setContentCompressionResistancePriority(.required, for: .horizontal)
             item.visibilityPriority = .user
-            item.isEnabled = true
+            item.isEnabled = false
 
             // This is the documented way to avoid the glass view on an item.
             // We don't want glass on our title.
@@ -308,3 +308,10 @@ extension TitlebarTabsTahoeTerminalWindow {
         }
     }
 }
+
+/// A "Ghosting" Hosting View, that acts like it's not there
+private class ClickThroughHostingView<Content: View>: NSHostingView<Content> {
+    override func hitTest(_ point: NSPoint) -> NSView? {
+        nil
+    }
+}

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

@@ -689,6 +689,11 @@ private class CenteredDynamicLabel: NSTextField {
         setContentCompressionResistancePriority(.defaultHigh, for: .horizontal)
     }
 
+    /// Click through, so we can double click here to enlarge current window
+    override func hitTest(_ point: NSPoint) -> NSView? {
+        nil
+    }
+
     // Vertically center the text
     override func draw(_ dirtyRect: NSRect) {
         guard let attributedString = self.attributedStringValue.mutableCopy() as? NSMutableAttributedString else {