v0.0.1b

Initial prerelease. See the macos tag — macOS only, universal binary (arm64 + x86_64) built from the Tauri app. Unsigned/not notarized (Apple Developer ID signing not yet configured), so Gatekeeper will require right-click → Open on first launch. The Xcode/Swift build (swift-app/) is not included in this release — its signing is not yet set up.