From b44066da61bca2f0190bae4269409083a3322f63 Mon Sep 17 00:00:00 2001
From: umsangdon <umsangdon@gmail.com>
Date: Fri, 30 Oct 2026 14:59:19 +0900
Subject: [PATCH] =?UTF-8?q?fix(D=20=EC=98=88=EC=A0=95=EB=85=B8=EC=84=A0):?=
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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---
 D03_PlanAnalysis/logic/D03_PlanAnalysis_Select.ts | 14 ++++++--------
 resources/tester/test_598_1_plan_select_layers.py | 11 +++++++++++
 2 files changed, 17 insertions(+), 8 deletions(-)

diff --git a/D03_PlanAnalysis/logic/D03_PlanAnalysis_Select.ts b/D03_PlanAnalysis/logic/D03_PlanAnalysis_Select.ts
index bea304984..ba25df693 100644
--- a/D03_PlanAnalysis/logic/D03_PlanAnalysis_Select.ts
+++ b/D03_PlanAnalysis/logic/D03_PlanAnalysis_Select.ts
@@ -134,15 +134,13 @@ function nextPieceId(pieces: ReadonlyArray<PlanPiece>): string {
   return `p${Math.max(0, ...used) + 1}`;
 }
 
-/** 꼭짓점 [a, b) 만 남긴 선 — 꼭짓점과 같은 길이 덧 칸(노드 기록 594-1)도 같이 자름 · 첫 기록 = 없음. */
+/** 꼭짓점 [a, b) 만 남긴 선 — 노드 기록(594-1)도 같이 자름 · 뒤쪽 첫 기록 = 없음(앞 노드가 사라짐). */
 function cutVertices(entry: PlanLine, a: number, b: number): PlanLine {
-  const out: PlanLine & { nodes?: unknown[] } = { ...entry, vertices: entry.vertices.slice(a, b) };
-  const nodes = (entry as { nodes?: unknown }).nodes;
-  if (Array.isArray(nodes) && nodes.length === entry.vertices.length) {
-    out.nodes = nodes.slice(a, b);
-    if (a > 0 && out.nodes.length) out.nodes[0] = null;
-  }
-  return out;
+  const vertices = entry.vertices.slice(a, b);
+  if (!entry.nodes) return { ...entry, vertices };
+  const nodes = entry.nodes.slice(a, b);
+  if (a > 0 && nodes.length) nodes[0] = null;
+  return { ...entry, vertices, nodes };
 }
 
 /** 토막 하나 지움 — 하나뿐 = 구역 지움 · 끝 토막 = 끝 점 뺌 · 가운데 = 구역 둘(뒤쪽 = 새 구역 · 갈래 아님) ·
diff --git a/resources/tester/test_598_1_plan_select_layers.py b/resources/tester/test_598_1_plan_select_layers.py
index 3643d0aca..0ae23beea 100644
--- a/resources/tester/test_598_1_plan_select_layers.py
+++ b/resources/tester/test_598_1_plan_select_layers.py
@@ -52,6 +52,12 @@ writeFileSync(process.argv[2], JSON.stringify({
   all: show(sel.removeAll(n)),
   nodes: sel.nodesAt(n, [200, 0]),
   moved: sel.movePointsAt([[200, 0], [5, 5]], [200, 0], [210, 5]),
+  nodes594: (() => {
+    const r = { kind: "length", length_m: 100, slope_pct: null };
+    const withNodes = { ...n, lines: n.lines.map((l, i) => (i ? l : { ...l, nodes: [null, r, r, r] })) };
+    const out = sel.removeSegment(withNodes, seg("main", 1));
+    return out.lines.filter((l) => l.id !== "branch-1").map((l) => [l.id, l.nodes]);
+  })(),
 }));
 """
 
@@ -127,3 +133,8 @@ def test_끌어_고르기_전체_지점_노드(tmp_path: Path) -> None:
     assert got["all"] == {"lines": [], "pieces": []}
     assert got["nodes"] == [{"line": "main", "vertex": 2}]  # 갈래 첫 점 뺌
     assert got["moved"] == [[210, 5], [5, 5]]
+    rec = {"kind": "length", "length_m": 100, "slope_pct": None}
+    assert got["nodes594"] == [
+        ["main", [None, rec]],
+        ["line-2", [None, rec]],
+    ]  # 노드 기록 같이 · 뒤쪽 첫 = 없음