Highjobop/dsh-tidy

DSH conversation tidy tools: fold a turn to show only the final result (button top-left of the conversation), a right-edge node rail with lazy message previews, and a bottom-left total-token badge aligned to the stats line with context-pressure warning colors. Each feature has an on/off switch in Settings > General (Conversation Tidy entry); zh/en bilingual; mode persisted in localStorage.