发现界面优化

app/src/main/res/layout/item_find_book.xml

@@ -37,7 +37,8 @@
             style="@style/Widget.Material3Expressive.Button.IconButton.Tonal"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            app:icon="@drawable/ic_arrow_right"
+            android:checkable="true"
+            app:icon="@drawable/m3_split_button_chevron_avd"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintTop_toTopOf="parent"
             app:layout_constraintBottom_toBottomOf="parent"/>
@@ -46,6 +47,7 @@
             android:id="@+id/rotate_loading"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
+            app:indicatorColor="?attr/colorSurface"
             app:indicatorSize="24dp"
             android:visibility="gone"
             app:layout_constraintTop_toTopOf="@id/iv_status"