Fold the generative concept generator (3 strategy variants: placement map +
ТЭП + finance) into the light analysis report (/site-finder/analysis/{cad}) as
a new section after «6. Прогноз», so Концепция lives in one place alongside the
report instead of a separate flow (epic #1953, #1965 Stage 1).
Frontend-only: reuses ConceptParamsForm / ConceptVariantsResult and the
/concepts mutation (useCreateConcept) as-is — no duplication, no backend change.
Inputs are seeded from the analysis the report already has (no re-entry of the
cadastre/polygon): polygon ← extractPolygon(geom_geojson); housing_class /
development_type ← financial_estimate inferred values; land_cost ←
egrn.cadastral_value_rub; falls back to comfort/mid_rise.
Runs on demand (heavy generative call — never auto on mount); result block
(Leaflet map) is lazy-mounted via dynamic({ ssr: false }) and the section is
collapsed by default. When financial_estimate is null (ЗОУИТ/СЗЗ/нет зоны) it
shows an honest banner but still allows a manual run, since /concepts is
independent of the financial_estimate gate. Graceful empty state when geometry
is missing/unsupported. Stage 2 (interactive 3D + /concepts/recompute) left as
a seam, not built.
