DSH terminal client

Key features

• Terminal-native UI, not a re-skinned echo.
• An interactive terminal chat for DeepSeek Harness — terminal-native style, built with Ink (React for terminals).
• INTEGRATION-NOTES.md — event shapes, patch semantics, and the integration deep-dive (how session/event maps to the UI)
• On every git commit (husky + lint-staged)
• The transcript is the surface — no boxes, no chrome.