core: ghostty_app_key only handles global keybinds for now

This introduces a separate bug fixes #2396

src/App.zig

@@ -294,6 +294,9 @@ pub fn keyEvent(
         .leaf => |leaf| leaf,
     };
 
+    // We only care about global keybinds
+    if (!leaf.flags.global) return false;
+
     // Perform the action
     self.performAllAction(rt_app, leaf.action) catch |err| {
         log.warn("error performing global keybind action action={s} err={}", .{