fix(embeds): wider card for Tidal, declutter caption while video plays

- Widen the interactive-embed card to min(38rem, 94vw) so the Tidal player (and
  other audio/video embeds) has enough width.
- Hide the title/description caption while a video embed is playing, so the text
  below it stops squeezing the player small (Twitch).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app/components/url-preview/UrlPreviewCard.tsx

@@ -1133,12 +1133,14 @@ function MediaEmbedCard({
             </Chip>
           )}
         </Box>
-        {title && (
+        {/* While a video plays, drop the title/description so the player isn't
+            squeezed by text below it. */}
+        {!(playing && video) && title && (
           <Text truncate priority="400">
             <b>{title}</b>
           </Text>
         )}
-        {description && (
+        {!(playing && video) && description && (
           <Text size="T200" priority="300">
             <UrlPreviewDescription>{description}</UrlPreviewDescription>
           </Text>