0.1.0

Added

• cc-shift builds and runs on Linux. Logins are moved between the
  .credentials.json files Claude Code keeps on Linux (mode 0600, replaced
  in one rename so open windows follow with their next message), and the
  early start runs from a systemd user timer.
• Each release has static Linux binaries for x86_64 and arm64 next to the
  macOS ones, and CI builds, lints and tests on Linux as well as macOS.
• doctor checks that curl is installed, and cc-shift finds curl on
  PATH when /usr/bin/curl is missing, as on NixOS.
• A switch holds Claude Code's own refresh lock of ~/.claude while it
  saves and replaces the active login, so no open window refreshes the login
  at that moment. This makes switching safer on macOS and Linux.
• Every file carries its copyright holder and its licence (Apache-2.0) as
  SPDX lines, and the repository follows the REUSE 3.3 specification,
  checked in CI.
• The README, the crates.io description and keywords, docs.rs and the
  GitHub repository describe macOS and Linux, with a platform: macOS | Linux
  badge.

Changed

• Messages say "stored login" instead of "Keychain login", and the help says
  the early start is run by the scheduled job, so they read right on Linux.
• A morning early start that runs more than 3 hours after its set time (a
  machine that woke or started late) starts nothing and says so in
  cc-shift log.