[jm-rivera]

Each turn in Studio's Activity tab now shows what the assistant did for the question, so a turn with no errors no longer reads as "Show 31 completed steps" with nothing in view.

Changes

• A turn opens with its question and an outcome line: start time, duration, cards made, and "N steps not done" in red when a failure stands.
• The approved plan and the steps that ran a tool sit on the step rail More Info uses (.rail and .step from CardInfoPanel.module.scss); status lines stay in the full log behind "Show all N lines, with times".
• A retry that worked folds into its step as "Worked on try N", which opens the tries with the cause once. A later step counts as a retry only when it arrived after the failed try settled, so parallel searches stay separate.
• A failure that stands reads "Not done" with its full sentence, advice included; a skipped step reads "Not run".
• A step that made a card shows the card's title and icon as a chip that brings the card into view (iconOf shared with WidgetChips.tsx).
• turnView in src/lib/studio/activityView.ts builds the view as a pure function with tests; ActivityLog.tsx renders it and ChatPanel.tsx passes card titles, icons, plans and the waiting state.
• recordStep and recordApproval in src/lib/studio/activity.ts number each turn's events as they arrive and stamp approvedAt, and restoreActivity keeps both, so retries fold and the plan row sits among the steps by arrival order. Older saves fall back to the clock, and a save with no approval time shows the plan at the top of the turn.
• A restored turn that never closed reads as ended, with no running timer.

Notes for reviewers

• Retries match by label and tool within a turn, and causeOf drops the ", so ..." advice from a recovered try by splitting the sentence. A retry_of and a cause field on activity.step from dfo-ai would make both exact.
• motion-kit/render.tsx selects steps with activityStyles.step, since .tool no longer exists.

Testing: pnpm lint, pnpm lint:css, pnpm typecheck, pnpm test (2,275 pass) and pnpm build pass. A headless run against next dev with a stub studio stream approved a plan and checked the rail and full log.

Screenshots

Before is origin/dev and after is this branch, both run with next dev against a seeded local Postgres and a stub studio stream, at 1440 by 900.

Change	Before	After
Ended turn as first seen
"Worked on try 4" opened	Not present
Full log opened
Live turn after approving a plan