Card detail navigation stops at the ends of the displayed list. The first card has no previous chevron; the last has no next chevron. Equal empty side slots keep the identity centered. Artwork swipes obey the same limits, superseding the previous forward-wrap requirement.

This follows the species navigation fix in mobile #1023 and documentation #388. Tests cover both boundaries, valid adjacent navigation and standalone cards. Full suite: 3446 passed, 11 skipped; lint and typecheck passed. Android verification follows installation; no iOS device verification claimed. Account and collection data are not modified.