onboarding

DSH 新手入门包：安装即得欢迎语、从 0 到 1 学习路径、按场景推荐插件、新手自查清单，并与 dsh-handbook-zh 中文教程联动。Starter pack for DeepSeek Harness beginners (Chinese).

First-run health check for DeepSeek Harness (dsh): verifies Node/pnpm/dsh toolchain, profile, API key (names only), workspace and registry, then prints actionable next steps. Zero runtime deps, read-only. CLI + agent-callable quickstart tool.