feat: full i18n — 1752 keys across 10 languages, all panels translated (#326)

feat(refactor): ready for manual QA after main sync (#274)

fix: add documents navigation and panel

feat: add workspace discoverability and multi-project task support

feat: add Update Available banner with GitHub release check (#94)

feat: sync side panel navigation with URL routes (#76) (#87)

feat: add local mode auto-detection for no-gateway users (#83)

feat: add Docker support, session controls, model catalog, API rate limiting

feat: initial open-source release