Refactor toggleMaximize to use notifications

macos/Sources/App/macOS/AppDelegate.swift

@@ -807,12 +807,6 @@ class AppDelegate: NSObject,
         setSecureInput(.toggle)
     }
 
-    @IBAction func toggleMaximize(_ sender: Any) {
-        if NSApp.isActive, let keyWindow = NSApp.keyWindow {
-            keyWindow.zoom(self)
-        }
-    }
-
     @IBAction func toggleQuickTerminal(_ sender: Any) {
         if quickController == nil {
             quickController = QuickTerminalController(

macos/Sources/Features/Terminal/BaseTerminalController.swift

@@ -115,6 +115,11 @@ class BaseTerminalController: NSWindowController,
             selector: #selector(ghosttyCommandPaletteDidToggle(_:)),
             name: .ghosttyCommandPaletteDidToggle,
             object: nil)
+        center.addObserver(
+            self,
+            selector: #selector(toggleMaximize),
+            name: .ghosttyToggleMaximize,
+            object: nil)
 
         // Listen for local events that we need to know of outside of
         // single surface handlers.
@@ -548,6 +553,11 @@ class BaseTerminalController: NSWindowController,
         window.performClose(sender)
     }
 
+    @IBAction func toggleMaximize(_ sender: Any) {
+        guard let window = window else { return }
+        window.zoom(self)
+    }
+
     @IBAction func splitRight(_ sender: Any) {
         guard let surface = focusedSurface?.surface else { return }
         ghostty.split(surface: surface, direction: GHOSTTY_SPLIT_DIRECTION_RIGHT)

macos/Sources/Ghostty/Ghostty.App.swift

@@ -774,8 +774,23 @@ extension Ghostty {
             _ app: ghostty_app_t,
             target: ghostty_target_s
         ) {
-            guard let appDelegate = NSApplication.shared.delegate as? AppDelegate else { return }
-            appDelegate.toggleMaximize(self)
+            switch (target.tag) {
+            case GHOSTTY_TARGET_APP:
+                Ghostty.logger.warning("toggle maximize does nothing with an app target")
+                return
+
+            case GHOSTTY_TARGET_SURFACE:
+                guard let surface = target.target.surface else { return }
+                guard let surfaceView = self.surfaceView(from: surface) else { return }
+                NotificationCenter.default.post(
+                    name: .ghosttyToggleMaximize,
+                    object: surfaceView
+                )
+
+
+            default:
+                assertionFailure()
+            }
         }
 
         private static func toggleVisibility(

macos/Sources/Ghostty/Package.swift

@@ -257,6 +257,9 @@ extension Notification.Name {
     /// Ring the bell
     static let ghosttyBellDidRing = Notification.Name("com.mitchellh.ghostty.ghosttyBellDidRing")
     static let ghosttyCommandPaletteDidToggle = Notification.Name("com.mitchellh.ghostty.commandPaletteDidToggle")
+
+    /// Toggle maximize of current window
+    static let ghosttyToggleMaximize = Notification.Name("com.mitchellh.ghostty.toggleMaximize")
 }
 
 // NOTE: I am moving all of these to Notification.Name extensions over time. This