flake.lock: Update (#208)

Flake lock file updates:

• Updated input 'claude-code':
    'github:sadjow/claude-code-nix/66c8b17' (2026-05-30)
  → 'github:sadjow/claude-code-nix/e65e7ec' (2026-05-31)
• Updated input 'claude-code/nixpkgs':
    'github:NixOS/nixpkgs/4100e83' (2026-05-27)
  → 'github:NixOS/nixpkgs/e9a7635' (2026-05-29)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/e8e446a' (2026-05-29)
  → 'github:nixos/nixpkgs/b51242d' (2026-05-31)
• Updated input 'stylix':
    'github:nix-community/stylix/ca07e06' (2026-05-29)
  → 'github:nix-community/stylix/8ed48a4' (2026-05-31)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: bottd