chore: remove unused public assets

public/assets/ark-library/figma/README.md

@@ -2,11 +2,8 @@
 
 Source: Figma file `uHDZkVHjAp7BXDKQKB0PM4`, responsive reference node `3761:10923`.
 
-- `banner-desktop.png` — desktop/tablet banner export from node `3621:1225`.
-- `banner-wide.png` — provided wide banner crop from node `3718:11952`.
-- `banner-576.png` — mobile/tablet banner crop from node `3726:13099`.
-- `banner-440.png` — mobile banner crop from node `3726:14199`.
-- `banner-375.png` — mobile banner crop from node `3726:14238`.
-- `official-recommendation-1.png` ... `official-recommendation-5.png` — official recommendation cover exports from the 1920px frame card image nodes; used only as fallback/placeholder covers so real resource cards keep accurate API-provided imagery.
+Currently retained asset:
 
-These files are visual UI assets only. They do not change backend data or API contracts.
+- `official-recommendation-cover.png` — fallback/placeholder cover used by `src/components/RecommendedCard.tsx` via `src/components/FigmaBanner.tsx`.
+
+Old static banner exports and individual recommendation placeholder exports were removed because the frontend now loads home banners from `/api/banners` and only uses the single shared recommendation cover fallback.