Why: establish the authorized task workspace and its initial baseline.
Evidence: preserved precheck receipt in .task/feature-generative-ui-u7-acceptance.md; R0=b634a278de74c8a2124531ab3e35360a84332087.
Impact: task metadata only; the feature workspace starts at b634a278de.
Refs: .task/feature-generative-ui-u7-acceptance.md