Multi-window wall for DeepSeek Harness

Key features

• Multi-windowOne-click entry from the sidebar
• Windows · Two chats side-by-side — two running DSH instances laid out together, each pane a full official conversation UI with live online status dots and per-window controls (maximize / refresh / new tab / remove)
• No official logic is touchedthe plugin only registers two additive list slots (conversation.view ring entry, sidebar.footer.action sidebar shortcut) and five read-only JSON routes (/multi/api/ports, /multi/api/status, /multi/api/stop, /multi/api/create, /multi/api/link).
• HMAC-signed HttpOnly/SameSite session cookie (12h default), ?token= for script convenience, per-IP rate limiting on failed logins
• the chat area becomes a window grid showing every task side-by-side, one pane per port