refactor: Element -> WidgetHost (cce-ui 6bd flip)

Mechanical rename; the god-trait name is gone workspace-wide.

Co-Authored-By: Claude Fable 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_018u7qTwzX95dd5ysAkaSCLk

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

diff --git a/src/main.rs b/src/main.rs
index 9b5cf28..d06d71e 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -8,7 +8,7 @@ use glyphon::{
 };
 use cce_ui::color;
 use cce_ui::widget::{
-    Adapted, Separator, Element,
+    Adapted, Separator, WidgetHost,
     MouseButton, ElementState, MouseScrollDelta, KeyEvent,
 };