feat(chat): integrate ask-user-question HITL flow

[Pandakingxbc]

Summary

• add a Dashboard question card that stays above the composer, asks bundled questions one at a time, and collapses after answering
• resume ask_user_question through the existing HITL respond path with validation, usage tracking, and history persistence
• support sequential question/answer collection in IM channels, including letter/number option shortcuts and follow-up HITL pauses
• expose the built-in interaction tool in the tool catalog and add Chinese/English UI and IM copy

Merge prerequisite

• Do not merge until a harness-agent release containing ask_user_question is published and installable.
• Verified on 2026-08-30: orcakit-harness-agent==1.0.1 is published on PyPI, its wheel contains harness_agent/builtin/tools/ask_user.py, and current develop already requires orcakit-harness-agent[all]>=1.0.1.
• If CI or an internal package mirror cannot resolve 1.0.1 yet, keep this PR unmerged until propagation completes.

Validation

• make all: 2717 passed, 15 skipped; Ruff, formatting, and mypy passed
• Dashboard focused tests: 2 files, 5 tests passed
• Dashboard production build: passed

Notes

• The implementation reuses Octop's existing HITL coordinator and persistence flow; it does not add a second question database or require a harness-gateway change.
• /skip is intentionally not part of the IM ask-user flow; a user's next ordinary text message answers the current question.

[Pandakingxbc]

octop red style