- `GET /v1/authors/:id` returns `AuthorWithCount` (id, name, manga_count).
- `GET /v1/authors/:id/mangas` paged works by that author.
- `GET /v1/authors?search=` autocomplete (already used by Phase 1 forms;
now formally exposed).
- New `/authors/:id` page on the frontend; author chips on the manga
detail page (added in Phase 1) now link to a real page.
- Extracts `lib/components/MangaCard.svelte` — already used by the home
page, ready for the collection page in Phase 3.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
