From 141bf31731eee544b6d638a30d673a3bacf7ed0b Mon Sep 17 00:00:00 2001
From: umsangdon <umsangdon@gmail.com>
Date: Sat, 17 Oct 2026 11:55:50 +0900
Subject: [PATCH] =?UTF-8?q?feat(B05=20=ED=8F=89=EB=A9=B4):=20366-3=20?=
 =?UTF-8?q?=EC=B8=A1=EC=A0=90=20=EC=8A=A4=EB=83=85=20=EC=BC=AC=20=3D=20?=
 =?UTF-8?q?=EA=B3=A1=EC=84=A0=20=EA=B0=80=EC=9A=B4=EB=8D=B0(MC)=EB=A5=BC?=
 =?UTF-8?q?=20=EC=9D=BC=EB=B0=98=EC=B8=A1=EC=A0=90=EC=97=90=20=E2=80=94=20?=
 =?UTF-8?q?=EC=83=88=20logic=20StationFit(=EA=B3=A0=EC=B9=9C=20=EC=9E=90?=
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 =?UTF-8?q?=C2=B7=20=ED=95=98=ED=95=9C=20=EC=83=88=EB=A1=9C=20=EA=B9=B8=20?=
 =?UTF-8?q?=C2=B7=20=EC=95=9E=20MC=20=ED=9D=94=EB=93=A6=20=3D=20=EB=B2=84?=
 =?UTF-8?q?=EB=A6=BC)=20=C2=B7=20=EB=86=93=EC=9D=84=20=EB=95=8C=20=C2=B7?=
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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Ji4nuyLVHcxrXWHTdb5nRD
---
 B05_Profile/B05_Profile_UI_RouteEdit.ts       |  16 +-
 .../B05_Profile_UI_RouteEdit_Chrome.ts        |   2 +-
 .../logic/B05_Profile_RouteEdit_StationFit.ts | 171 ++++++++++++++++++
 .../logic/B05_Profile_UI_RouteEdit_Edits.ts   |   3 +
 resources/tester/helper_366_3_station_fit.cjs | 114 ++++++++++++
 .../tester/test_345_4_recommend_panel.py      |   4 +-
 resources/tester/test_366_3_station_fit.py    |  85 +++++++++
 7 files changed, 388 insertions(+), 7 deletions(-)
 create mode 100644 B05_Profile/logic/B05_Profile_RouteEdit_StationFit.ts
 create mode 100644 resources/tester/helper_366_3_station_fit.cjs
 create mode 100644 resources/tester/test_366_3_station_fit.py

diff --git a/B05_Profile/B05_Profile_UI_RouteEdit.ts b/B05_Profile/B05_Profile_UI_RouteEdit.ts
index 2a9cc77b8..964be9050 100644
--- a/B05_Profile/B05_Profile_UI_RouteEdit.ts
+++ b/B05_Profile/B05_Profile_UI_RouteEdit.ts
@@ -91,6 +91,7 @@ import {
 import type { DesignPageHost } from "../A00_Common/design/design_page";
 import * as draftLink from "./B05_Profile_UI_RouteEdit_Draft";
 import { bindRouteShift } from "./B05_Profile_UI_RouteEdit_Shift";
+import * as fit from "./logic/B05_Profile_RouteEdit_StationFit";
 import "./B05_Profile_UI_Style_RouteEdit.css";
 
 /** 등고선 눈금을 고를 때 쓸 라벨 예산 — B04 지도 기본값(350)보다 **넉넉히** 둔다
@@ -159,7 +160,7 @@ export async function mountRouteEditor(
   let apexLock: boolean[] = [];
   /** 지금 고른 꺾임점 — 곡선 편집줄이 이 자리를 만진다. 없으면 -1. */
   let picked = -1;
-  /** [측점 스냅](요구 224-2) — 보기 모드라 되돌리기 밖 · 열 때 서버 값 · [확인] 때 저장. */
+  /** [측점 스냅](224-2 · 366-3) — 켬 = 곡선 MC 를 일반측점에 · 켬끔 자체는 되돌리기 밖 · [저장] 때 저장. */
   let stationSnap = false;
   let savedStationSnap = false;
   /** 편집 창 측점 한 곳 — 끔이면 null(간격마다) · 켬이면 호 안 하나를 곡선 중점으로.
@@ -265,6 +266,7 @@ export async function mountRouteEditor(
   const showMinorContours = bindMinorContourToggle(minorContourButton, () => draw());
   stationSnapButton.addEventListener("click", () => {
     setStationSnap(!stationSnap);
+    if (stationSnap && history) applyEdit("곡선 가운데(MC)를 일반측점에 맞췄습니다."); // 전체 · 한 걸음
     void crossPreview.refresh(); // 떠 있는 횡단도 옮긴 측점 규칙으로.
     draw();
   });
@@ -415,6 +417,7 @@ export async function mountRouteEditor(
       violationCount: nodeInfo.filter((node) => node.violations.length).length,
       minRadiusM,
       fresh: nodeInfo.length === 0,
+      offStation: stationSnap ? fit.offStationCount(plannedLine, curveInfo, stationIntervalM) : 0,
     });
 
   // ── 곡선 라벨 — 고른 꺾임점 옆에 뜨는 조작 패널. 배선은 `_CurveBar` 몫 ──
@@ -445,8 +448,12 @@ export async function mountRouteEditor(
   const curveLabelBox = curveBar.label;
   const syncCurveBar = curveBar.sync;
 
-  /** 한 번의 편집을 마무리한다 — 다시 그리고, 라벨·상태줄을 맞추고, 되돌리기에 쌓는다. */
-  function applyEdit(message: string, record = true): void {
+  /** 한 번의 편집을 마무리한다 — 다시 그리고, 라벨·상태줄을 맞추고, 되돌리기에 쌓는다.
+   *  측점 스냅 켬이면 고친 자리 앞 곡선부터 MC 를 일반측점에(366-3 · 되살림 `fitting=false` 은 안 맞춤). */
+  function applyEdit(message: string, record = true, fitting = true): void {
+    const limits = { minRadiusM, limitRadiusM, limitArcM, intervalM: stationIntervalM };
+    const from = fit.fitStart(history?.current?.(), snapshotNow());
+    if (stationSnap && fitting) planned = fit.fitCurveStations(snapshotNow(), limits, from);
     markEdited();
     writeRouteLocks(projectId, planned, apexLock); // 고정은 [취소] · 다시 열기에도 남는다(22-5).
     syncCurveBar();
@@ -476,7 +483,7 @@ export async function mountRouteEditor(
     const locks = record ? routeLocksOf(planned, apexLock) : null;
     ({ planned, curveOn, curveRadius, curveLock, curveArc, apexLock, picked } = snapshot);
     if (locks) apexLock = lockColumn(planned, locks);
-    applyEdit(message, record);
+    applyEdit(message, record, false); // 되돌리기 · 추천 [적용] · 초안 되살림은 안 맞춤(366-3)
   }
 
   const historyControls = bindHistoryControls({
@@ -532,6 +539,7 @@ export async function mountRouteEditor(
     curveHint,
     contourHint,
     commit: () => {
+      if (stationSnap) return applyEdit("곡선 가운데(MC)를 일반측점에 맞췄습니다."); // 놓을 때(366-3)
       history?.commit(snapshotNow());
       historyControls.sync();
     },
diff --git a/B05_Profile/B05_Profile_UI_RouteEdit_Chrome.ts b/B05_Profile/B05_Profile_UI_RouteEdit_Chrome.ts
index 5e8ed273a..13021c9e8 100644
--- a/B05_Profile/B05_Profile_UI_RouteEdit_Chrome.ts
+++ b/B05_Profile/B05_Profile_UI_RouteEdit_Chrome.ts
@@ -85,7 +85,7 @@ export function createRouteEditChrome(
           <i class="b05-route__view-separator" aria-hidden="true"></i>
           <button type="button" class="ui-btn ui-btn--glass" data-act="station-snap"
             aria-pressed="false"
-            title="곡선(호) 안 측점 하나를 곡선 중점(MC)으로 옮깁니다 — [저장] 때 저장">측점 스냅</button>
+            title="켜면 곡선 가운데(MC)를 가까운 일반측점에 맞춥니다 — 놓을 때 고친 자리부터 교각점을 간격 절반 안에서 밂 · 고정 교각점은 그대로 · 못 맞춘 곡선은 상태줄 「측점 밖 곡선」 · [저장] 때 저장">측점 스냅</button>
           <label class="b05-routeedit__terrain" hidden
             title="노선 편집 분석(등고선 · 지반고 · 기울기 · 횡단 미리보기 · 추천)에 쓸 지형 — 확정 지표면 · 종횡단은 안 바뀝니다">분석 지형
             <select class="ui-select ui-select--sm" data-act="terrain">
diff --git a/B05_Profile/logic/B05_Profile_RouteEdit_StationFit.ts b/B05_Profile/logic/B05_Profile_RouteEdit_StationFit.ts
new file mode 100644
index 000000000..c2e1da9ea
--- /dev/null
+++ b/B05_Profile/logic/B05_Profile_RouteEdit_StationFit.ts
@@ -0,0 +1,171 @@
+/* =============================================================================
+ * B05_Profile/logic/B05_Profile_RouteEdit_StationFit.ts
+ * 측점 스냅 켬 = 곡선 가운데(MC)를 일반측점에(366-3 · 요구 240-11) — 손 편집 평면.
+ *
+ * 추천 노선 맞춤(`B05_Profile_Engine_RouteInitial_Station.py` `_try` · `_solve`)을 줄인 꼴:
+ *   · `from`(`fitStart` = 고친 자리 앞)부터 끝까지 차례로 — 고정 아닌 교각점(IP)을 들어오는 접선 따라 ±간격/2 안에서
+ *     밀어 MC(BC · EC 누가거리 가운데)를 가까운 일반측점(앞 MC 측점 + 간격 이상 · No.1 이상)에 둠.
+ *   · 곡선 하한을 새로 깨거나(`shortfallCrossed`) 앞 곡선 MC 를 흔들면 버림 → 그 곡선은 그대로.
+ *   · 반지름 · 켬끔은 안 바꿈 — IP 자리만. 합치기 · 곡선 끄기 · 되돌아가기 없음.
+ * 파이썬 짝 아님 — [저장] 때 서버가 저장된 IP 로 선을 다시 짬(`buildEditedPolyline` 짝)이라 MC 그대로.
+ * 순수 계산 — 화면 · fetch · sessionStorage 없음. 부르는 쪽은 `B05_Profile_UI_RouteEdit`.
+ * ========================================================================== */
+
+import {
+  buildEditedPolyline,
+  type EditedCurve,
+  type EditedPolyline,
+  type Vertex,
+} from "./B05_Profile_UI_RouteEdit_Curve";
+import {
+  applyArcLocks,
+  applyCurveLimits,
+  curveShortfalls,
+  shortfallCrossed,
+  type NodeColumns,
+} from "./B05_Profile_UI_RouteEdit_Edits";
+import { curveSpans } from "./B05_Profile_UI_RouteEdit_Frame";
+
+/** MC 가 측점에서 이만큼 안이면 「위」(m) — 파이썬 `MC_TOL_M` 과 같은 값. */
+export const MC_TOL_M = 0.05;
+
+/** 선을 짜는 값 — 편집 창이 쥔 하한 · 간격. */
+export interface FitLimits {
+  minRadiusM: number;
+  limitRadiusM: number;
+  limitArcM: number;
+  intervalM: number;
+}
+
+type Columns = Pick<NodeColumns, "curveOn" | "curveRadius" | "curveLock" | "curveArc" | "apexLock">;
+
+/** 편집 창 `markEdited` 와 같은 길(길이 고정 R · 하한 끌어올림 → 선) — 값은 사본에. */
+function build(cols: Columns, planned: Vertex[], limits: FitLimits): EditedPolyline {
+  const radius = [...cols.curveRadius];
+  applyArcLocks(planned, cols.curveLock, cols.curveArc, radius);
+  applyCurveLimits(planned, cols.curveOn, radius, limits.limitRadiusM, limits.limitArcM);
+  return buildEditedPolyline(planned, cols.curveOn, radius, limits.minRadiusM);
+}
+
+/** 꺾임점 `k` 곡선의 MC 누가거리 — 곡선이 없으면 null. */
+function mcOf(built: EditedPolyline, k: number): number | null {
+  const curve = built.curves.find((item) => item.node_first === k);
+  const span = curve ? curveSpans(built.vertices, [curve])[0] : undefined;
+  return span ? (span[0] + span[1]) / 2 : null;
+}
+
+/** 측점 밖 곡선 수 — MC 가 일반측점(No.1 이상) 위가 아닌 곡선 · 한 측점에 둘이면 하나만 위. */
+export function offStationCount(
+  line: ReadonlyArray<Vertex>,
+  curves: ReadonlyArray<EditedCurve>,
+  intervalM: number,
+): number {
+  if (!(intervalM > 0)) return 0;
+  const spans = curveSpans(line, curves);
+  const hits = new Set<number>();
+  for (const [start, end] of spans) {
+    const mc = (start + end) / 2;
+    const n = Math.round(mc / intervalM);
+    if (n >= 1 && Math.abs(mc - n * intervalM) <= MC_TOL_M) hits.add(n);
+  }
+  return spans.length - hits.size;
+}
+
+/** 맞춤을 시작할 꺾임점 — 지난 걸음과 처음 다른 자리 바로 앞(그 곡선 끝 접선도 바뀜) · 같으면 1. */
+export function fitStart(
+  before: (Columns & Pick<NodeColumns, "planned">) | null | undefined,
+  now: Columns & Pick<NodeColumns, "planned">,
+): number {
+  if (!before) return 1;
+  const keys = ["curveOn", "curveRadius", "curveLock", "curveArc", "apexLock"] as const;
+  const at = now.planned.findIndex(
+    (vertex, i) =>
+      vertex[0] !== before.planned[i]?.[0] ||
+      vertex[1] !== before.planned[i]?.[1] ||
+      keys.some((key) => now[key][i] !== before[key][i]),
+  );
+  const changed =
+    at < 0 && now.planned.length !== before.planned.length ? now.planned.length - 1 : at;
+  return Math.max(1, changed - 1);
+}
+
+const round4 = (value: number): number => Math.round(value * 1e4) / 1e4;
+
+/** 곡선 하나 맞춤 — IP `k` 를 들어오는 접선 따라 d 밀어 MC = target(할선법 · 기울기 ≈ 1). */
+function solve(
+  cols: Columns,
+  limits: FitLimits,
+  planned: Vertex[],
+  k: number,
+  target: number,
+  mc: number,
+): { planned: Vertex[]; built: EditedPolyline; mc: number } | null {
+  const base = planned[k];
+  const before = planned[k - 1];
+  const length = Math.hypot(base[0] - before[0], base[1] - before[1]);
+  if (!(length > 1e-9)) return null;
+  const ux = (base[0] - before[0]) / length;
+  const uy = (base[1] - before[1]) / length;
+  const reach = limits.intervalM / 2;
+  const clamp = (d: number): number => Math.max(-reach, Math.min(reach, d));
+  const at = (d: number) => {
+    const next = planned.slice();
+    next[k] = [round4(base[0] + ux * d), round4(base[1] + uy * d)];
+    const built = build(cols, next, limits);
+    const found = mcOf(built, k);
+    return found === null ? null : { planned: next, built, mc: found };
+  };
+  let d0 = 0;
+  let f0 = mc - target;
+  let d1 = clamp(-f0);
+  for (let step = 0; step < 10; step += 1) {
+    const tried = at(d1);
+    if (!tried || d1 === d0) return null;
+    const f1 = tried.mc - target;
+    if (Math.abs(f1) <= MC_TOL_M / 5) return tried;
+    const slope = (f1 - f0) / (d1 - d0);
+    if (Math.abs(slope) < 0.2) return null;
+    d0 = d1;
+    f0 = f1;
+    d1 = clamp(d1 - f1 / slope);
+  }
+  return null;
+}
+
+/** `from` 꺾임점부터 끝까지 곡선 MC 를 일반측점에 — 새 IP 목록(못 놓은 곡선 IP 는 그대로). */
+export function fitCurveStations(
+  cols: Columns & Pick<NodeColumns, "planned">,
+  limits: FitLimits,
+  from: number,
+): Vertex[] {
+  let planned = cols.planned.map((vertex): Vertex => [vertex[0], vertex[1]]);
+  const interval = limits.intervalM;
+  if (!(interval > 0) || planned.length < 3) return planned;
+  let built = build(cols, planned, limits);
+  const floor = curveShortfalls(built.nodes, limits.limitRadiusM, limits.limitArcM);
+  let lastStation = 0; // 앞 곡선이 놓인 측점 번호(없으면 0 = 시점)
+  let previous = -1; // 앞 곡선 꺾임점
+  for (let k = 1; k < planned.length - 1; k += 1) {
+    const mc = mcOf(built, k);
+    if (mc === null) continue;
+    const near = Math.max(lastStation + 1, Math.round(mc / interval));
+    const onStation = Math.abs(mc - near * interval) <= MC_TOL_M;
+    const fitted =
+      onStation || k < from || cols.apexLock[k] || Math.abs(near * interval - mc) > interval / 2
+        ? null
+        : solve(cols, limits, planned, k, near * interval, mc);
+    const keep =
+      fitted &&
+      !shortfallCrossed(
+        floor,
+        curveShortfalls(fitted.built.nodes, limits.limitRadiusM, limits.limitArcM),
+      ) &&
+      (previous < 0 ||
+        Math.abs((mcOf(fitted.built, previous) ?? Infinity) - (mcOf(built, previous) ?? 0)) <=
+          MC_TOL_M / 5);
+    if (fitted && keep) ({ planned, built } = fitted);
+    if (onStation || keep) lastStation = near;
+    previous = k;
+  }
+  return planned;
+}
diff --git a/B05_Profile/logic/B05_Profile_UI_RouteEdit_Edits.ts b/B05_Profile/logic/B05_Profile_UI_RouteEdit_Edits.ts
index 1106aa610..30fdf4ddd 100644
--- a/B05_Profile/logic/B05_Profile_UI_RouteEdit_Edits.ts
+++ b/B05_Profile/logic/B05_Profile_UI_RouteEdit_Edits.ts
@@ -168,6 +168,8 @@ export interface CurveSummaryInput {
   minRadiusM: number;
   /** 아직 한 번도 안 그렸나(막 열었을 때). */
   fresh: boolean;
+  /** 측점 스냅 켬 때 MC 가 일반측점 밖인 곡선 수(366-3) — 끔이면 0. */
+  offStation?: number;
 }
 
 /** 상태줄 꼬리 — 곡선 수·기준 미달·사용자가 손댄 자리를 한 줄로. */
@@ -192,6 +194,7 @@ export function curveSummary(input: CurveSummaryInput): string {
   return (
     `곡선 ${input.curveCount}곳(하한 R ${input.minRadiusM}m)` +
     `${input.violationCount ? ` · 기준 미달 ${input.violationCount}곳` : ""}` +
+    `${input.offStation ? ` · 측점 밖 곡선 ${input.offStation}개` : ""}` +
     `${edits ? ` · ${edits}` : ""}`
   );
 }
diff --git a/resources/tester/helper_366_3_station_fit.cjs b/resources/tester/helper_366_3_station_fit.cjs
new file mode 100644
index 000000000..37e872e41
--- /dev/null
+++ b/resources/tester/helper_366_3_station_fit.cjs
@@ -0,0 +1,114 @@
+/* 366-3 측점 스냅 = 곡선 가운데(MC)를 일반측점에 — `logic/B05_Profile_RouteEdit_StationFit.ts` 를
+ * Node 로 돌려 JSON 한 줄을 냄(`test_366_3_station_fit.py` 가 판정).
+ * `.cjs` = 루트 package.json 이 "type": "module" 이라서.
+ */
+const fs = require("fs");
+const path = require("path");
+const ts = require(path.join(__dirname, "..", "..", "config", "node_modules", "typescript"));
+
+const ROOT = path.join(__dirname, "..", "..");
+const cache = new Map();
+
+function loadTs(file) {
+  const full = path.resolve(file);
+  if (cache.has(full)) return cache.get(full);
+  const js = ts.transpileModule(fs.readFileSync(full, "utf8"), {
+    compilerOptions: { module: ts.ModuleKind.CommonJS, target: ts.ScriptTarget.ES2020 },
+  }).outputText;
+  const box = { exports: {} };
+  cache.set(full, box.exports);
+  const localRequire = (request) =>
+    request.startsWith(".")
+      ? loadTs(path.join(path.dirname(full), `${request}.ts`))
+      : require(request);
+  new Function("exports", "module", "require", js)(box.exports, box, localRequire);
+  cache.set(full, box.exports);
+  return box.exports;
+}
+
+const LOGIC = path.join(ROOT, "B05_Profile", "logic");
+const fit = loadTs(path.join(LOGIC, "B05_Profile_RouteEdit_StationFit.ts"));
+const curve = loadTs(path.join(LOGIC, "B05_Profile_UI_RouteEdit_Curve.ts"));
+const frame = loadTs(path.join(LOGIC, "B05_Profile_UI_RouteEdit_Frame.ts"));
+
+const INTERVAL = 20;
+const LIMITS = { minRadiusM: 30, limitRadiusM: 12, limitArcM: 0, intervalM: INTERVAL };
+// 지그재그 노선 — 꺾임 다섯(교각 다양) · 직선 넉넉
+const ROUTE = [
+  [0, 0],
+  [93, 7],
+  [171, 61],
+  [262, 48],
+  [337, 112],
+  [431, 101],
+  [503, 160],
+];
+
+function columns(planned, lock = []) {
+  const n = planned.length;
+  return {
+    planned,
+    curveOn: planned.map(() => true),
+    curveRadius: planned.map(() => null),
+    curveLock: planned.map(() => null),
+    curveArc: planned.map(() => null),
+    apexLock: planned.map((_, i) => i === 0 || i === n - 1 || lock.includes(i)),
+  };
+}
+
+function measure(planned) {
+  const built = curve.buildEditedPolyline(
+    planned,
+    planned.map(() => true),
+    planned.map(() => null),
+    LIMITS.minRadiusM,
+  );
+  const spans = frame.curveSpans(built.vertices, built.curves);
+  const mcs = spans.map(([a, b]) => (a + b) / 2);
+  const total = frame.stationsAlong(built.vertices, INTERVAL, false);
+  const length = built.vertices.reduce(
+    (sum, v, i) =>
+      i ? sum + Math.hypot(v[0] - built.vertices[i - 1][0], v[1] - built.vertices[i - 1][1]) : 0,
+    0,
+  );
+  return {
+    curves: built.curves.length,
+    mcs,
+    residues: mcs.map((mc) => Math.abs(mc - Math.round(mc / INTERVAL) * INTERVAL)),
+    innerStations: total.filter((s) => s > 0 && s < length).length,
+    off: fit.offStationCount(built.vertices, built.curves, INTERVAL),
+  };
+}
+
+const moved = (a, b) => a.map((v, i) => Math.hypot(v[0] - b[i][0], v[1] - b[i][1]));
+
+const before = measure(ROUTE);
+const all = fit.fitCurveStations(columns(ROUTE), LIMITS, 1);
+const locked = fit.fitCurveStations(columns(ROUTE, [3]), LIMITS, 1);
+const fromLater = fit.fitCurveStations(columns(ROUTE), LIMITS, 4);
+const everyLocked = fit.fitCurveStations(columns(ROUTE, [1, 2, 3, 4, 5]), LIMITS, 1);
+
+console.log(
+  JSON.stringify({
+    before,
+    all: { ...measure(all), moved: moved(ROUTE, all) },
+    locked: { ...measure(locked), moved: moved(ROUTE, locked) },
+    fromLater: { ...measure(fromLater), moved: moved(ROUTE, fromLater) },
+    everyLocked: { ...measure(everyLocked), moved: moved(ROUTE, everyLocked) },
+    again: moved(all, fit.fitCurveStations(columns(all), LIMITS, 1)),
+    noInterval: moved(ROUTE, fit.fitCurveStations(columns(ROUTE), { ...LIMITS, intervalM: 0 }, 1)),
+    start: {
+      moved4: fit.fitStart(
+        columns(ROUTE),
+        columns(ROUTE.map((v, i) => (i === 4 ? [v[0] + 1, v[1]] : v))),
+      ),
+      radius2: fit.fitStart(columns(ROUTE), {
+        ...columns(ROUTE),
+        curveRadius: ROUTE.map((_, i) => (i === 2 ? 40 : null)),
+      }),
+      dropLast: fit.fitStart(columns(ROUTE), columns(ROUTE.filter((_, i) => i !== 5))),
+      same: fit.fitStart(columns(ROUTE), columns(ROUTE)),
+      none: fit.fitStart(null, columns(ROUTE)),
+    },
+  }),
+);
diff --git a/resources/tester/test_345_4_recommend_panel.py b/resources/tester/test_345_4_recommend_panel.py
index 341579d3a..20845504b 100644
--- a/resources/tester/test_345_4_recommend_panel.py
+++ b/resources/tester/test_345_4_recommend_panel.py
@@ -46,9 +46,9 @@ def test_적용은_본문_평면에_되돌리기_한_칸():
     assert "apply: (snapshot, message) => restoreSnapshot(snapshot, message, true)," in main
     restore = main[main.index("function restoreSnapshot(") :]
     restore = restore[: restore.index("\n  }\n")]
-    assert "applyEdit(message, record);" in restore
+    assert "applyEdit(message, record, false);" in restore  # 366-3 — 추천 적용은 측점 맞춤 안 함
     apply_edit = main[main.index("function applyEdit(") :]
-    assert "if (record) history?.commit(snapshotNow());" in apply_edit[:600]
+    assert "if (record) history?.commit(snapshotNow());" in apply_edit[:900]
     initial = _read("B05_Profile/B05_Profile_UI_RouteEdit_Initial.ts")
     on_apply = initial[initial.index("onApply: (picked) => {") :]
     assert on_apply[:500].count("params.apply(") == 1
diff --git a/resources/tester/test_366_3_station_fit.py b/resources/tester/test_366_3_station_fit.py
new file mode 100644
index 000000000..d816fcbef
--- /dev/null
+++ b/resources/tester/test_366_3_station_fit.py
@@ -0,0 +1,85 @@
+"""366-3 측점 스냅 = 곡선 가운데(MC)를 일반측점에 — `logic/B05_Profile_RouteEdit_StationFit.ts`
+를 Node(`helper_366_3_station_fit.cjs`)로 돌려 판정 + 편집기 이음(놓을 때 · applyEdit · 켤 때 ·
+되돌리기 · 추천 적용은 안 맞춤 · 상태줄 「측점 밖 곡선 N개」).
+
+    ./venv/Scripts/python.exe -m pytest resources/tester/test_366_3_station_fit.py -q
+"""
+
+import json
+import subprocess
+from pathlib import Path
+
+import pytest
+
+ROOT = Path(__file__).resolve().parents[2]
+B05 = ROOT / "B05_Profile"
+HELPER = Path(__file__).with_name("helper_366_3_station_fit.cjs")
+TOL = 0.05
+
+
+@pytest.fixture(scope="module")
+def got() -> dict:
+    run = subprocess.run(  # noqa: S603 — 고정 실행 파일
+        ["node", str(HELPER)], capture_output=True, text=True, encoding="utf-8", timeout=60
+    )
+    assert run.returncode == 0, run.stderr
+    return json.loads(run.stdout)
+
+
+def test_맞추기_전_곡선은_측점_밖(got) -> None:
+    assert got["before"]["off"] == got["before"]["curves"] == 5
+
+
+def test_MC_는_일반측점_위(got) -> None:
+    fit = got["all"]
+    assert fit["curves"] == 5 and fit["off"] == 0
+    assert max(fit["residues"]) <= TOL
+    stations = [round(mc / 20) for mc in fit["mcs"]]
+    assert all(n >= 1 for n in stations) and len(set(stations)) == len(stations)
+
+
+def test_곡선_수는_측점_수_이하(got) -> None:
+    assert got["all"]["curves"] <= got["all"]["innerStations"]
+
+
+def test_시점_종점_고정_IP_그대로_밀림은_간격_절반_안(got) -> None:
+    for case in ("all", "locked", "fromLater"):
+        moved = got[case]["moved"]
+        assert moved[0] == 0 and moved[-1] == 0
+        assert max(moved) <= 10 + 1e-6
+    assert got["locked"]["moved"][3] == 0
+
+
+def test_못_놓은_곡선은_그대로_개수(got) -> None:
+    assert got["locked"]["off"] == 1  # 고정 IP 곡선 하나만 밖 · 나머지는 맞춤
+    assert got["everyLocked"]["off"] == 5 and max(got["everyLocked"]["moved"]) == 0
+
+
+def test_고친_자리부터만(got) -> None:
+    moved = got["fromLater"]["moved"]
+    assert moved[1:4] == [0, 0, 0] and moved[4] > 0
+    assert got["fromLater"]["residues"][3:] == pytest.approx([0, 0], abs=TOL)
+
+
+def test_맞춘_선은_다시_맞춰도_그대로_간격_0_은_안_맞춤(got) -> None:
+    assert max(got["again"]) == 0 and max(got["noInterval"]) == 0
+
+
+def test_시작_자리는_고친_꺾임점_앞(got) -> None:
+    start = got["start"]
+    assert start["moved4"] == 3 and start["radius2"] == 1
+    assert start["dropLast"] == 4  # 지운 마지막 꺾임점 → 새 끝 앞 곡선부터
+    assert start["same"] == 1 and start["none"] == 1
+
+
+def test_편집기_이음() -> None:
+    edit = (B05 / "B05_Profile_UI_RouteEdit.ts").read_text("utf-8")
+    assert "fitCurveStations(" in edit
+    # 되돌리기 · 추천 [적용] · 초안 되살림이 지나는 restoreSnapshot 은 안 맞춤
+    at = edit.index("function restoreSnapshot(")
+    assert "applyEdit(message, record, false);" in edit[at : at + 700]
+    assert len(edit.splitlines()) <= 700
+    edits = (B05 / "logic" / "B05_Profile_UI_RouteEdit_Edits.ts").read_text("utf-8")
+    assert "측점 밖 곡선 " in edits
+    chrome = (B05 / "B05_Profile_UI_RouteEdit_Chrome.ts").read_text("utf-8")
+    assert "곡선 가운데(MC)를 가까운 일반측점에" in chrome