Why: U6 extends pages from conversations into the task/project
workspace - surfaces aggregate across conversations under the owner's
project scope (project resolved authoritatively from the conversation
row, never self-reported by the model), and the catalog guidance now
organizes pages by task phase (requirements/execution/acceptance)
while stating that task facts come only from real task records.
Evidence: build/vet clean; surfacesvc suite green incl. the new
project-aggregation test (owner isolation, cross-owner zero, history
retained post-disable); genui/store suites green.
Impact: New endpoint GET /api/projects/{id}/surfaces; Submit resolves
project from conversation; catalog text guidance. Existing endpoints
unchanged.
Refs: proposal r2 U6; Dev task feature/generative-ui-u6
weichen