Why: the task-centric sidebar (approved option A) needs a cross-project
conversation list, server-authoritative pinned/archived state, and an
identity endpoint for the sidebar account footer.
Evidence:
- migration v8 conversation_flags (sqlite/postgres up+down; the upgrade
test walks v1<->v8 for real); store and e2e tests cover pinned-first
ordering, archived filtering with ?archived=1, tenant-isolation
negatives (cross-owner flag write -> NotFound), and /api/me shape
(owner/name/auth) in embedded mode.
- go vet + full go test ./... pass.
Impact: additive columns/APIs; existing endpoints unchanged (PATCH gains
optional pinned/archived fields; responses keep prior shape).
Refs: core bump deps/agent-system-core -> 1dc08fc (Conversation flags)
weichen
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