add transparency prop to tab bar (#9336)

src/view/com/home/HomeHeader.tsx

@@ -61,6 +61,7 @@ export function HomeHeader(
         items={items}
         dragProgress={props.dragProgress}
         dragState={props.dragState}
+        transparent
       />
     </HomeHeaderLayout>
   )

src/view/com/home/HomeHeaderLayoutMobile.tsx

@@ -77,6 +77,7 @@ export function HomeHeaderLayoutMobile({
               style={[
                 a.justify_center,
                 {marginRight: -Layout.BUTTON_VISUAL_ALIGNMENT_OFFSET},
+                a.bg_transparent,
               ]}>
               <ButtonIcon icon={FeedsIcon} size="lg" />
             </Link>