Add agent whiteboard: per-agent tab, MCP drawing tools, live SSE sync#735

Open

lukebrevoort wants to merge 6 commits into

selfcontained:mainfrom

lukebrevoort:lukebrevoort/whiteboard-agent-drawing

Commits on Jul 8, 2026

Address architecture review: extract store, handlers, pane; dedupe routing

lukebrevoort-mytra
and
claude
committed
Default agent ink to theme-adaptive default instead of violet

lukebrevoort-mytra
and
claude
committed