To-Dos Stay in Step Across Devices (v3.10)

Building on Consolidated Topic To-Dos in 3.9, ticking off an action item now agrees everywhere it appears.

Completion matches between the session it came from, the Topic
To-Dos
tab, your other devices, and the API.
Completion is stored per item instead of by rewriting the whole list, so one device can no longer undo another's change.
New for Pro:

PATCH /v1/sessions/:sessionId/todos/:todoId
accepts
completed
and
dueDate
, and MCP gains
UpdateToDoCompletion
and
UpdateToDoDueDate
, so you can tick items off or re-date them from Claude.
Due dates are free text, so "next Friday" and "2026-08-22" both work. An empty string clears one.
Editing the item in the app afterwards takes authority back from a due date set through the API.