Backend for the first-run wizard (phase 4).
- POST /api/v1/setup/scaffold: given an existing device_id + display_index
(+ optional calibration), wires a working chain via the real validated
store create paths — create-or-reuse capture template -> raw picture
source -> picture color-strip source (calibration or default) -> LED
output target -> returns the ids. Does NOT auto-start. Rolls back every
entity it created (reverse order) on any partial failure, leaving no
orphans; "created" events are deferred until the whole chain succeeds so
a rolled-back scaffold never leaves ghost cards in the UI.
- Requires an existing device_id (no inline device creation) — the wizard
creates the device first via the canonical, URL-validated POST /devices,
so the scaffold can't bypass device validation. display_index is bounded.
- GET/PUT /api/v1/preferences/onboarding: persistent first-run flag
({onboarded, completed_at}) via db.set_setting; server stamps completed_at.
- Both routes AuthRequired. Tests: 25 (scaffold happy/reuse/rollback/
validation + onboarding + calibration round-trip integration). docs/API.md.
Part of the edge-calibration + first-run-wizard feature (Big Bang; intermediate
phase — full build/suite gated at the final phase).
alexei.dolgolyov
9dcd76d264