DSH Side Chat v0.1.0

Adds independent native side conversations, multi-tab history, explicit fork from the main chat, and a responsive project website. Install from the DSH plugin manager with github:Jensen-Yao/dsh-side-chat#v0.1.0. Requires DSH 0.2.1-rc.2 or a compatible newer version. Web interactions were verified in an isolated profile; native desktop interactions have not yet been independently verified.