feat(workhub): persist Coordination conversation (Slice 3)

[ARE404]

Summary

• render the WorkHub conversation from the durable Coordination Session transcript while keeping ordinary Sessions as read-only status and routing targets
• add a dedicated, tool-free WorkHub answer authority and persist model Q&A without creating ordinary Sessions
• durably record clarifications and routing summaries with idempotent recovery across navigation and Runtime Host restarts
• migrate the Slice 2 Coordination Session to a fixed zero-tool execution profile and fail closed on identity or profile drift

Safety and boundaries

• ordinary turn.start remains unavailable for the reserved Coordination Session
• WorkHub execution requires the exact reserved id and role, fixed modes, and workhub-coordination-v1
• the Coordination profile exposes zero tools and disables memory extraction
• transcript reads are bounded and fail open; summary persistence failures do not cause duplicate ordinary Session admission

Verification

• npm run typecheck
• npm run lint
• npm run check:asf-headers
• Runtime Host WorkHub, protocol, profile, and authority tests
• storage root-admission restart test
• desktop WorkHub controller, transcript, and surface tests

The follow-up test commit also updates three stale Runtime Host queue tests to use the typed request API introduced by #3784, which is required for the full workspace typecheck.

Tracking: #3492 (Slice 3)

[Astro-Han]

Update on 417784cad2:

[P2] Coordination turnId reuse across operations merges turns

workhub-coordination-coordinator.ts:194-205,241-264 allows answer and record to reuse the same caller-supplied turnId without sharing durable identity. Concurrent or sequential reuse appends two triplets for the same turn, which deriveTurnRecords merges.

Fix: reject cross-operation turnId conflicts before admission/append while preserving idempotent replay within the same operation.

Checks on 417784cad2 are test: failure (e2e workhub-reconstruction remains) — not green.

简体中文

存在跨操作 turnId 复用导致的合并错误。

[Astro-Han]

Update on 23d70d1dbd:

GO — no P0-P3. Adds durable WorkHub Coordination via workhub.coordination.answer (ledger-owned Turn) and record (persistent triplet with idempotent matching); both gate via same admission lease to avoid cross-operation reuse. Hosted test: SUCCESS (32859138152).

简体中文

该头无阻断。

[Astro-Han]

APPROVE — 23d70d1, no P0-P3, hosted test SUCCESS.

[Astro-Han]

LGTM. merging!