Make Cmd+T always open a normal tab instead of splitting

Remove worktree tab interception from both the ghosttyNewTab
notification handler and the newTab IBAction so Cmd+T creates
a standard tab regardless of worktree tab settings.

Author: nicosuave

macos/Sources/App/macOS/AppDelegate.swift

@@ -874,14 +874,8 @@ class AppDelegate: NSObject,
         let configAny = notification.userInfo?[Ghostty.Notification.NewSurfaceConfigKey]
         let config = configAny as? Ghostty.SurfaceConfiguration
 
-        if WorktrunkPreferences.worktreeTabsEnabled, let root = controller.worktreeTabRootPath {
-            var base = config ?? Ghostty.SurfaceConfiguration()
-            base.workingDirectory = base.workingDirectory ?? root
-            TerminalAgentHooks.apply(to: &base)
-
-            controller.openWorktreeTabNewSession(baseConfig: base)
-            return
-        }
+        // Always create a normal tab, even when worktree tabs are enabled.
+        // Worktree split behavior is handled separately.
 
         _ = TerminalController.newTab(ghostty, from: window, withBaseConfig: config)
     }

macos/Sources/Features/Terminal/TerminalController.swift

@@ -1811,11 +1811,6 @@ class TerminalController: BaseTerminalController, TabGroupCloseCoordinator.Contr
     }
 
     @IBAction func newTab(_ sender: Any?) {
-        if WorktrunkPreferences.worktreeTabsEnabled, let root = worktreeTabRootPath {
-            openWorktreeTabSession(worktreePath: root, baseConfig: Ghostty.SurfaceConfiguration())
-            return
-        }
-
         guard let surface = focusedSurface?.surface else { return }
         ghostty.newTab(surface: surface)
     }