[Improve] Refine task conversation activity presentation

[roomote-roomote]

Opened on behalf of Bruno Bergher. Follow up by mentioning @roomote-roomote, in the web UI, or in Slack.

Related issue

N/A — internal product cleanup requested over Slack.

Why this PR exists

• A maintainer explicitly invited this PR in the linked issue or discussion
• I am a maintainer / this is internal Roomote work

What changed

This refreshes task conversation presentation so completed activity reads as compact progress instead of a long stream of repetitive implementation detail.

• Consecutive same-type tool calls collapse into one multi-call row after the second call settles, including shell/execute calls and missing-toolCallId call/result pairs.
• Background reasoning, tool calls, and tool results can collapse into activity groups around assistant text and todo/progress boundaries.
• Todo markers stay visible as progress boundaries inside historical and live activity, including leading activity before the rendered prompt.
• ACP group rows, tool details, command output, and generic multi-call labels were tuned for lighter, more readable presentation.
• Task UI affordances around draft prompts, pending request panels, subtasks, and the wake input tray were aligned with the updated conversation layout.
• Added/updated focused client coverage for task messages, todo boundaries, wake input behavior, ACP activity grouping, grouped tool rendering, anchors, and tool detail presentation.

How it was tested

• pnpm exec oxlint --deny-warnings
• pnpm knip
• Pre-push hook passed: oxlint, residual turbo lint for @roomote/web and @roomote/worker, pnpm check-types:fast, and pnpm knip

Browser screenshots were not captured: no Storybook story for this component, and the seeded sandbox transcript does not reliably include enough representative completed activity to show the collapsed UI honestly.

Checklist

• The PR title follows the repo convention: [Fix], [Feat], [Improve], [Refactor], [Docs], or [Chore] followed by a user-facing description
• This PR is small and scoped to one change
• pnpm lint and pnpm check-types pass locally
• I added tests or included a clear manual validation note above
• I removed secrets, tokens, private keys, and customer data from code, logs, and screenshots
• If this change should appear in the changelog, I ran pnpm changeset

[roomote-roomote]

No new code issues found. See task

• apps/web/src/app/(sandbox)/task/[taskId]/messages/acp/render-blocks.ts:469-477 — Generic grouped tool headers. Fixed earlier.
• apps/web/src/app/(sandbox)/task/[taskId]/messages/acp/render-blocks.ts:383-385 — Dead subagent display kind. Fixed earlier.
• apps/web/src/app/(sandbox)/task/[taskId]/messages/acp/render-blocks.ts:873-889 — Missing toolCallId call/result pair. Fixed earlier.
• apps/web/src/app/(sandbox)/task/[taskId]/messages/acp/render-blocks.ts:577-585 — Repeated no-toolCallId ops collapsed into one. Fixed: missing ids only pair consecutive call→result; same-signature settled results stay distinct.
• apps/web/src/app/(sandbox)/task/[taskId]/messages/acp/activity-groups.ts:84-104 — Live partial reasoning/tool activity hidden in collapsed groups. Fixed: partial / in-progress blocks are not activity-collapsible.
• apps/web/src/app/(sandbox)/task/[taskId]/messages/acp/AcpCommandOutputMessage.tsx:49-51,69-77 — Non-zero exit status not shown. Fixed: restored → exit N / failed status cue.
• apps/web/src/app/(sandbox)/task/[taskId]/WakeTaskInput.tsx:134 / WakeTaskInput.client.test.tsx:263 — Placeholder test out of date. Fixed: assertion matches Wake up Roomote with a message....

_{Reviewed 83bb1018}

[roomote-roomote]

Addressed all 3 open review items on this PR in 81b63f1:

1. Generic multi-call headers now read like Used 2 get issue calls (and Edited N files for edit tools).
2. Removed the unreachable subagent display-kind branch.
3. Missing toolCallId call/result pairs are deduped by payload signature so one invocation no longer becomes two group items.

Validation: @roomote/web typecheck + grouping Vitest (44 tests).

See task

[roomote-roomote]

Addressed the remaining open review items and the failing Test jobs in 05517c94 / 83bb1018:

1. No-toolCallId dedupe only pairs consecutive call→result; repeated same-signature results stay separate.
2. Live partial / in-progress reasoning and tools stay outside default-closed activity groups.
3. Restored non-zero command exit status (→ exit 1).
4. Wake-input placeholder test matches the current copy.

Focused Vitest + web typecheck green.

See task