Integrate Todo List

Add a TodoWrite tool and panel so the in-app Atlas agent can show task progress.

Skip if the app uses the Atlas / EOS sidebar (integrate-fusion-agent). Prerequisite: useAtlasChat + src/atlas-agent/ + @sinclair/typebox from integrate-atlas-chat.

Step 1 — Read the app

Before writing anything, read:

• package.json — confirm @tabler/icons-react is installed; if not, install it with the app's package manager
• src/App.tsx — find where to add TodoProvider
• The file that calls useAtlasChat (likely src/chat/useChatViewModel.ts or src/App.tsx) — this is where the tool gets wired
• The chat view component that renders messages — this is where TodoPanel and TodoToolResultCard go