- app/api/ideas/route.ts: GET (list with archived/product_id/status filters,
user_id-scope), POST (creates DRAFT with auto IDEA-NNN code, 201)
- app/api/ideas/[id]/route.ts: GET (idea + recent logs), PATCH
(ideaUpdateSchema, isIdeaEditable guard)
- lib/idea-dto.ts: API projection — converts Prisma row → DTO with
lowercase status + has_grill_md/has_plan_md flags (md content excluded
from list payloads, fetch via dedicated download action)
Auth: session OR API-token via authenticateApiRequest. Strict user_id
scope (no productAccessFilter — Idee is privé per Q8). 404 (not 403) for
foreign-user reads to prevent enumeration.
Tests: 13 cases (auth-401, demo-403, validation-422, malformed-400,
not-found-404, status-mismatch-422, filter param round-trip, DTO shape).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>