fix(E04): 중심선 = 측점 중심(B06 누가) — route_points 는 접선 꺾은선이라 누가가 달라 구간 노드 · 지도 구간선이 어긋남 (533-3)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

E04_Stab3D/E04_Stab3D_Router.py

@@ -184,7 +184,6 @@ def _overview(project_root: Path, root: Path) -> dict[str, Any]:
     for item in saved:
         current = run.fingerprint(finger_source, ground, item.pop("settings"))
         item["stale"] = item.pop("fingerprint") != current
-    points = source.db_snapshot(root).get("route_points") or []
     return {
         "sections": run.auto_sections(stations),
         "stations": [
@@ -196,9 +195,10 @@ def _overview(project_root: Path, root: Path) -> dict[str, Any]:
             }
             for s in stations
         ],
+        # 중심선 = 측점 중심(B06 누가 그대로 · route_points 는 접선 꺾은선이라 누가가 다름)
         "line": [
-            [float(p["model_x"]), float(p["model_y"]), float(p["chainage_m"])]
-            for p in sorted(points, key=lambda p: p["sequence_num"])
+            [float(s["center_x"]), float(s["center_y"]), float(s["chainage_m"])]
+            for s in sorted(stations, key=lambda s: float(s["chainage_m"]))
         ],
         "saved": saved,
         "defaults": SearchSettings().model_dump(),