cargo clippy --fix on files the new clippy (1.93) flags: unused imports (name_index, storyteller), manual_range_contains (block_irregularity), length-comparison/is_empty (layer3, serialization). All behavior-preserving. Surfaced because a warm target/ makes the pre-push hook actually run clippy (it skips on cold worktrees). Remaining non-auto-fixable test-code lints tracked in #967. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>