refactor: adapt Spinbox/Panel/leaf fields to the cce-ui Phase 5 migration

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

 src/main.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main.rs b/src/main.rs
index 7d891be..e9d99fc 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -39,7 +39,7 @@ struct TypefaceApp {
 
     // Preview panel
     style_dropdown: Dropdown,
-    size_spinbox: Spinbox,
+    size_spinbox: cce_ui::widget::Adapted<cce_ui::widget::Spinbox>,
     preview_box: TextBox,
 
     // Details panel