v0.1.0 — first release

Mid-session agent-preset switching for DeepSeek Harness.

• Composer button beside the access-mode control (conversation.input.left)
• Live scope re-link via agentPresets.recompose (no blank-session lock)
• Logs agent-preset/selected and appends a notice for the model
• Zero-dependency: safe to install from GitHub without duplicating @deepseek-ai packages

Install: cd /profiles && npm install github:the-ninth-moon/dsh-preset-switch
Register: add a preset-switch row to profiles/web/cordis.patch.yml, then restart dsh.