Bump all surfaces to 0.9.23 together (CLI, desktop app, Windows menubar +
Tauri/Cargo, Flatpak, README download links) and regenerate the lockfile
version fields. Move the Unreleased changelog into a dated 0.9.23 section
covering the Capacity Dock, OMP/Grok pricing fix, CB-3/CB-4 sync, and the
desktop/TUI/menubar reliability fixes. Credit CodexBar (prior art) in the
README acknowledgements and third-party notices.
- electron-builder snap target (classic confinement) with package:snap script
- build-snap.yml: builds on ubuntu, uploads artifact, optional store publish
gated on workflow_dispatch input + SNAPCRAFT_STORE_CREDENTIALS secret
- app/flathub: manifest repacking the released deb, desktop file, AppStream
metainfo, and submission runbook
