chore: Dropdown -> Adapted<Dropdown> (cce-ui Phase 5p migration)

Mechanical sweep for the migrated cce-ui Dropdown: field types wrap in
Adapted<Dropdown>, raw 'as *mut Dropdown' casts become .as_ptr_mut().

Co-Authored-By: Claude Fable 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_011vTEhEwTGYYhHRbh658SAc

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

diff --git a/src/main.rs b/src/main.rs
index e9d99fc..1780b4b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -38,7 +38,7 @@ struct TypefaceApp {
     font_buttons: Vec<cce_ui::widget::Adapted<cce_ui::widget::Button>>,
 
     // Preview panel
-    style_dropdown: Dropdown,
+    style_dropdown: cce_ui::widget::Adapted<Dropdown>,
     size_spinbox: cce_ui::widget::Adapted<cce_ui::widget::Spinbox>,
     preview_box: TextBox,