feat(ui): add shadow to video post trending cards

Added a small shadow (shadow_sm) to the CompactVideoPostCard and the
"View more" card in TrendingVideos for improved visual depth and
consistency. This enhances the card appearance and aligns with the
design system.

src/components/VideoPostCard.tsx

@@ -411,6 +411,7 @@ export function CompactVideoPostCard({
       onPressOut={onPressOut}
       style={[
         a.flex_col,
+        t.atoms.shadow_sm,
         {
           alignItems: undefined,
           justifyContent: undefined,
@@ -534,7 +535,7 @@ export function CompactVideoPostCardPlaceholder() {
   const black = getBlackColor(t)
 
   return (
-    <View style={[a.flex_1]}>
+    <View style={[a.flex_1, t.atoms.shadow_sm]}>
       <View
         style={[
           a.rounded_lg,

src/components/interstitials/TrendingVideos.tsx

@@ -197,6 +197,7 @@ function VideoCards({
             a.flex_1,
             a.rounded_lg,
             t.atoms.bg,
+            t.atoms.shadow_sm,
           ]}>
           {({pressed}) => (
             <View