dsh-desktop-kit v0.1.0

First release: self-owned desktop shell for DeepSeek Harness. Native Tauri window on the loopback web surface with real macOS fullscreen, single instance, external links via system browser, browser-style zoom, window-close-shuts-harness lifecycle. Attachments: plugin tarball (dsh plugin --profile web add) + prebuilt shell binary for macOS aarch64 (install to ~/.dsh/bin).