fix(b06): 횡단 보기 반폭 [적용] = 요청값만 — 교차점 맞춤 폭으로 누를 때마다 재생성하던 옛 줄 지움(173-6)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01F3mdb91125mPoC6tpsQx4P

resources/tester/helper_173_6_half_width.cjs

@@ -0,0 +1,50 @@
+/* 횡단 보기 반폭 [적용](PLAN 173-6) 단위검증 헬퍼 — `createSampleWidener` 를 그 자리에서 트랜스파일해 돌린다.
+ * 보유 샘플(20 m) 안 요청은 재생성 없이 true · 넘는 요청만 재생성 한 번. 결과는 표준출력에 JSON 한 벌.
+ * 짝 = `test_173_6_half_width_apply.py`.
+ */
+const fs = require("fs");
+const path = require("path");
+const ts = require(path.join(__dirname, "..", "..", "config", "node_modules", "typescript"));
+
+const ROOT = path.join(__dirname, "..", "..");
+const calls = { regenerate: [], overlay: 0 };
+const STUBS = {
+  "@ui/ui_template_locale": {
+    currentLanguageIndex: 0,
+    ui_locales: new Proxy({}, { get: () => [""] }),
+  },
+  "@ui/ui_template_elements": {
+    showLoadingOverlay: () => calls.overlay++,
+    hideLoadingOverlay: () => {},
+    showToast: () => {},
+  },
+  "./B06_Section_Api_Fetch": {
+    regenerateSections: async (_p, _r, width) => calls.regenerate.push(width),
+    fetchSectionDetail: async () => ({ cross_sections: [] }),
+  },
+  "./B06_Section_Section_Store": { replaceSectionDetail: () => {} },
+};
+
+const file = path.join(ROOT, "B06_Section", "B06_Section_UI_Page_Common.ts");
+const js = ts.transpileModule(fs.readFileSync(file, "utf8"), {
+  compilerOptions: { module: ts.ModuleKind.CommonJS, target: ts.ScriptTarget.ES2020 },
+}).outputText;
+const box = { exports: {} };
+new Function("exports", "module", "require", js)(box.exports, box, (r) => STUBS[r]);
+
+(async () => {
+  let sampled = 20;
+  const widen = box.exports.createSampleWidener({
+    target: () => ({ projectId: "p", routeId: 1 }),
+    sampledHalfWidth: () => sampled,
+    applyDetail: () => (sampled = calls.regenerate.at(-1)),
+  });
+  const out = {};
+  out.within = [await widen(10), await widen(15), await widen(20)];
+  out.withinCalls = calls.regenerate.length;
+  out.over = await widen(25);
+  out.overCalls = [...calls.regenerate];
+  out.again = await widen(25); // 넓힌 뒤 같은 값은 재생성 없음
+  out.againCalls = calls.regenerate.length;
+  process.stdout.write(JSON.stringify(out));
+})();

resources/tester/test_173_6_half_width_apply.py

@@ -0,0 +1,48 @@
+"""173-6 횡단 보기 반폭 [적용] — 요청값만으로 샘플 폭을 잼(교차점 맞춤 폭 안 씀).
+
+원지반 못 만나는 측점이 있으면 누를 때마다 서버 재생성하던 옛 줄(`maxToeFitHalfWidth`)을 지움 →
+보유 샘플(20 m) 넘는 값일 때만 재생성 · 나머지는 카드 다시 그리기만.
+소스(`design_view_cross.ts` · `B06_Section_UI_Cross_Fit.ts`) + `createSampleWidener` 를 돌린 값
+(`helper_173_6_half_width.cjs`).
+"""
+
+import json
+import subprocess
+from pathlib import Path
+
+import pytest
+
+HERE = Path(__file__).parent
+ROOT = HERE.parents[1]
+DVC = (ROOT / "A00_Common" / "design" / "design_view_cross.ts").read_text(encoding="utf-8")
+FIT = (ROOT / "B06_Section" / "B06_Section_UI_Cross_Fit.ts").read_text(encoding="utf-8")
+
+
+def _apply_body() -> str:
+    at = DVC.index("async function applyCrossHalfWidth")
+    return DVC[at : DVC.index("\n  }\n", at)]
+
+
+def test_적용은_요청값만_넘김() -> None:
+    body = _apply_body()
+    assert "ensureSampledWidth(requested)" in body
+    assert "maxToeFitHalfWidth" not in DVC and "Math.max" not in body
+
+
+def test_교차점_맞춤_폭_함수_지움() -> None:
+    assert "maxToeFitHalfWidth" not in FIT and "toeFitHalfWidth" not in FIT
+
+
+@pytest.mark.skipif(not (ROOT / "config" / "node_modules").is_dir(), reason="의존성 미설치")
+def test_보유_폭_안은_재생성_없음_넘을_때만_한_번() -> None:
+    done = subprocess.run(  # noqa: S603 — 고정 실행 파일
+        ["node", str(HERE / "helper_173_6_half_width.cjs")],
+        capture_output=True,
+        text=True,
+        encoding="utf-8",
+    )
+    assert done.returncode == 0, done.stderr
+    out = json.loads(done.stdout)
+    assert out["within"] == [True, True, True] and out["withinCalls"] == 0
+    assert out["over"] is True and out["overCalls"] == [25]
+    assert out["again"] is True and out["againCalls"] == 1