feat(analytics): buildings block + dynamic developer comparison

- ObjectBuilding type + useObjectBuildings hook
- Objects detail page: render Корпуса ЖК table (cad_num, floors, area,
  purpose, name, address) when buildings_count > 0
- Developers page: drop hardcoded compareIds, use top-3 from
  useTopDevelopers sorted by jk_count DESC (fallback to legacy static
  array when API has no data yet)

frontend/src/app/analytics/developers/page.tsx

@@ -21,9 +21,20 @@ function DevelopersInner() {
     (top.data ?? []).map((r) => [r.developer_id, r.developer_name]),
   );
 
+  // Top-3 by jk_count (complexes count) from the leaderboard, falling back to
+  // static defaults if data is not yet available.
+  const top3Ids = (top.data ?? [])
+    .slice()
+    .sort((a, b) => (b.jk_count ?? 0) - (a.jk_count ?? 0))
+    .slice(0, 3)
+    .map((r) => r.developer_id);
+
+  const defaultTop3 =
+    top3Ids.length >= 3 ? top3Ids : ["6208_0", "5791_0", "5832_0"];
+
   const compareIds = focusedId
-    ? [focusedId, ...["5791_0", "5832_0"].filter((x) => x !== focusedId)]
+    ? [focusedId, ...defaultTop3.filter((x) => x !== focusedId).slice(0, 2)]
-    : ["6208_0", "5791_0", "5832_0"];
+    : defaultTop3;
 
   return (
     <>
@@ -71,7 +82,7 @@ function DevelopersInner() {
         title={
           focusedId && focused
             ? `Сравнение sold% — ${focused.developer_name} vs benchmarks`
-            : "Сравнение sold% — PRINZIP vs Брусника vs Форум"
+            : `Сравнение sold% — топ-3 девелопера`
         }
         subtitle="Ежемесячная история DOM.РФ realization (endpoint=developer)."
       >
@@ -79,18 +90,8 @@ function DevelopersInner() {
           developerIds={compareIds}
           developerNames={
             focused
-              ? {
+              ? { ...topNames, [focused.developer_id]: focused.developer_name }
-                  ...topNames,
+              : topNames
-                  [focused.developer_id]: focused.developer_name,
-                  "6208_0": "PRINZIP",
-                  "5791_0": "Брусника",
-                  "5832_0": "Холдинг Форум-групп",
-                }
-              : {
-                  "6208_0": "PRINZIP",
-                  "5791_0": "Брусника",
-                  "5832_0": "Холдинг Форум-групп",
-                }
           }
         />
       </Section>

frontend/src/app/analytics/objects/[id]/page.tsx

@@ -7,7 +7,11 @@ import { useParams } from "next/navigation";
 import { KpiCard } from "@/components/analytics/KpiCard";
 import { LazyMount } from "@/components/analytics/LazyMount";
 import { Section } from "@/components/analytics/Section";
-import { useObjectDetail, useObjectSalesAgg } from "@/lib/analytics-api";
+import {
+  useObjectBuildings,
+  useObjectDetail,
+  useObjectSalesAgg,
+} from "@/lib/analytics-api";
 
 // Heavy sections deferred so initial paint and main-thread are not blocked.
 const ObjectSaleChart = dynamic(
@@ -67,6 +71,7 @@ export default function ObjectDrillInPage() {
 
   const detail = useObjectDetail(objId);
   const agg = useObjectSalesAgg(objId);
+  const buildings = useObjectBuildings(objId);
 
   const apartments = agg.data?.find((r) => r.type === "apartments");
   const parking = agg.data?.find((r) => r.type === "parking");
@@ -197,6 +202,104 @@ export default function ObjectDrillInPage() {
           <ObjectPhotoGallery objId={objId} />
         </LazyMount>
       </Section>
+
+      {/* Корпуса ЖК — показываем только если есть данные */}
+      {(d?.buildings_count ?? 0) > 0 &&
+        buildings.data &&
+        buildings.data.length > 0 && (
+          <Section
+            title="Корпуса ЖК"
+            subtitle="Данные из NSPD: кадастровый номер, этажность, площадь, назначение."
+          >
+            <div style={{ overflowX: "auto" }}>
+              <table
+                style={{
+                  width: "100%",
+                  borderCollapse: "collapse",
+                  fontSize: 13,
+                }}
+              >
+                <thead>
+                  <tr style={{ background: "#f9fafb" }}>
+                    {[
+                      "Кад. номер",
+                      "Этажей",
+                      "Площадь, м²",
+                      "Назначение",
+                      "Название",
+                      "Адрес",
+                    ].map((h) => (
+                      <th
+                        key={h}
+                        style={{
+                          padding: "8px 10px",
+                          textAlign: "left",
+                          fontWeight: 600,
+                          borderBottom: "1px solid #e6e8ec",
+                          whiteSpace: "nowrap",
+                        }}
+                      >
+                        {h}
+                      </th>
+                    ))}
+                  </tr>
+                </thead>
+                <tbody>
+                  {buildings.data.map((b, i) => (
+                    <tr
+                      key={b.cad_num ?? i}
+                      style={{ borderTop: "1px solid #f3f4f6" }}
+                    >
+                      <td
+                        style={{
+                          padding: "8px 10px",
+                          fontFamily: "monospace",
+                          fontSize: 12,
+                        }}
+                      >
+                        {b.cad_num ?? "—"}
+                      </td>
+                      <td style={{ padding: "8px 10px" }}>{b.floors ?? "—"}</td>
+                      <td style={{ padding: "8px 10px" }}>
+                        {b.area != null
+                          ? b.area.toLocaleString("ru-RU", {
+                              maximumFractionDigits: 1,
+                            })
+                          : "—"}
+                      </td>
+                      <td style={{ padding: "8px 10px", color: "#5b6066" }}>
+                        {b.purpose ?? "—"}
+                      </td>
+                      <td style={{ padding: "8px 10px" }}>
+                        {b.building_name ?? "—"}
+                      </td>
+                      <td
+                        style={{
+                          padding: "8px 10px",
+                          color: "#5b6066",
+                          fontSize: 12,
+                        }}
+                      >
+                        {b.readable_address ?? "—"}
+                      </td>
+                    </tr>
+                  ))}
+                </tbody>
+              </table>
+            </div>
+          </Section>
+        )}
+
+      {/* Placeholder when buildings_count > 0 but data not yet loaded */}
+      {(d?.buildings_count ?? 0) > 0 &&
+        buildings.data &&
+        buildings.data.length === 0 && (
+          <Section title="Корпуса ЖК" subtitle="">
+            <p style={{ color: "#5b6066", fontSize: 13 }}>
+              Геометрия корпусов ещё не подгружена с NSPD.
+            </p>
+          </Section>
+        )}
     </>
   );
 }

frontend/src/lib/analytics-api.ts

@@ -10,6 +10,7 @@ import type {
   DeveloperTopRow,
   DistrictRow,
   MarketPulsePoint,
+  ObjectBuilding,
   ObjectDetail,
   ObjectInfraPoi,
   ObjectPhoto,
@@ -209,6 +210,15 @@ export function useObjectPhotos(objId: number | string, limit = 100) {
   });
 }
 
+export function useObjectBuildings(objId: number | string) {
+  return useQuery({
+    queryKey: ["analytics", "object-buildings", objId],
+    queryFn: () =>
+      apiFetch<ObjectBuilding[]>(`${BASE}/object/${objId}/buildings`),
+    enabled: !!objId,
+  });
+}
+
 // ── Recommender (Уровень 1) ─────────────────────────────────────────────────
 
 export function useRecommendMix() {

frontend/src/types/analytics.ts

@@ -150,6 +150,17 @@ export interface ObjectDetail {
   longitude: number | null;
   obj_status: number | null;
   snapshot_date: string | null;
+  buildings_count: number | null;
+}
+
+export interface ObjectBuilding {
+  cad_num: string | null;
+  floors: number | null;
+  area: number | null;
+  purpose: string | null;
+  building_name: string | null;
+  readable_address: string | null;
+  geom_geojson: unknown;
 }
 
 export interface ObjectSaleGraphPoint {