fix(plugin-basic-ui): Fix a bug that entrance transitions are not applied (#624)

Co-authored-by: anakin_karrot <anakin@daangn.com>

Author: ENvironmentSet

.changeset/rude-schools-brush.md

@@ -0,0 +1,5 @@
+---
+"@stackflow/plugin-basic-ui": patch
+---
+
+Fix a bug that entrance transition is not applied.

extensions/plugin-basic-ui/src/components/AppScreen.tsx

@@ -234,7 +234,16 @@ const AppScreen: React.FC<AppScreenProps> = ({
     >
       <div
         ref={appScreenRef}
-        className={clsx(css.appScreen({ transitionState }), className)}
+        className={clsx(
+          css.appScreen({
+            transitionState:
+              transitionState === "enter-done" ||
+              transitionState === "exit-done"
+                ? transitionState
+                : lazyTransitionState,
+          }),
+          className,
+        )}
         style={assignInlineVars(
           compactMap({
             [globalVars.backgroundColor]: backgroundColor,