Mostly empty squares right now. Do it without wrecking the bundle budget. - [ ] a stable source (e.g. Cover Art Archive / a seeded placeholder set) - [ ] `loading="lazy"`, explicit `width`/`height` (no CLS) - [ ] `srcset` / `sizes` so we do not ship 1000px images into an 80px slot - [ ] graceful placeholder when an album has no cover **Acceptance:** Lighthouse "image" checks pass and the bundle budget still holds.