style(e4): prettier-format two S6-touched files to unblock the 0.70.0 gate

The reveal-class swap in S6 shortened two className lines (VideoCard action row,
SavedViewsWidget default-star), which prettier wants collapsed to one line. The
local `npm run lint` doesn't run prettier --check, so it slipped past the sprint
gate and only the release `siftlode check` caught it. Formatting only, no behavior
change. Fixes the pre-publish gate for the already-merged 0.70.0 on main.

frontend/src/components/VideoCard.tsx

@@ -60,12 +60,7 @@ function Actions({
     // flex-wrap is the safety net, not the plan: the sizing above is what makes them fit. If a
     // future button or a narrower column breaks that arithmetic, the row wraps to a second line
     // rather than silently rendering a half-clipped control outside the card.
-    <div
-      className={clsx(
-        "flex flex-wrap reveal transition",
-        dense ? "gap-0.5" : "gap-1",
-      )}
-    >
+    <div className={clsx("flex flex-wrap reveal transition", dense ? "gap-0.5" : "gap-1")}>
       <button
         onClick={act("watched")}
         title={video.status === "watched" ? t("card.watchedUnmark") : t("card.markWatched")}