refactor: adapt Button fields to the cce-ui Phase 5 migration

Button::new now returns Adapted<Button>; concrete-typed fields become
Adapted<Button>. Construction sites, builder chains, and method calls
are unchanged (Deref + Element forwards + mirrored builders).

Co-Authored-By: Claude Fable 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01LkfJazPs9bRchkcozmxXCX

 src/main.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 3816ede..7e99484 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -250,7 +250,7 @@ struct DataEditorApp {
     selected_choice_editor: Dropdown,
     selected_keybind_editor: KeybindRecorder,
     selected_bool_editor: cce_ui::widget::Adapted<Checkbox>,
-    selected_button_editor: Button,
+    selected_button_editor: cce_ui::widget::Adapted<cce_ui::widget::Button>,
 
     // Right Panel Raw Json
     raw_json_editor: TextBox,
@@ -1276,7 +1276,7 @@ impl Application for DataEditorApp {
                 self.ui_context.register_widget(self.selected_choice_editor.base().unwrap().id(), &mut (*self_ptr).selected_choice_editor as *mut Dropdown as *mut (dyn Element + 'static));
                 self.ui_context.register_widget(self.selected_keybind_editor.base().unwrap().id(), &mut (*self_ptr).selected_keybind_editor as *mut KeybindRecorder as *mut (dyn Element + 'static));
                 self.ui_context.register_widget(self.selected_bool_editor.base().unwrap().id(), (*self_ptr).selected_bool_editor.as_ptr_mut());
-                self.ui_context.register_widget(self.selected_button_editor.base().unwrap().id(), &mut (*self_ptr).selected_button_editor as *mut Button as *mut (dyn Element + 'static));
+                self.ui_context.register_widget(self.selected_button_editor.base().unwrap().id(), (*self_ptr).selected_button_editor.as_ptr_mut());
                 self.ui_context.register_widget(self.menubar.base().unwrap().id(), &mut (*self_ptr).menubar as *mut MenuBar as *mut (dyn Element + 'static));
                 self.ui_context.register_widget(self.statusbar.base().unwrap().id(), &mut (*self_ptr).statusbar as *mut StatusBar as *mut (dyn Element + 'static));
                 self.ui_context.register_widget(self.main_splitter.base().unwrap().id(), &mut (*self_ptr).main_splitter as *mut SplitBox as *mut (dyn Element + 'static));