feat(511-B B-5 follow 줄 엶): 계산 자리 follow(P5 P6 F1 F2) 바꿀 수 있음 · 기본 both 그대로 · 「서버」 = 끌기 도구 꼴(끌기 중 화면 셈 · 잠잠 뒤 창구 /calc stage.follow until follow → 서버 Node route · follow 두 단계 · 답 오면 묶음을 노선부터 다시 돌려 서버 값으로 · 곁 자료 plusAt · followedAt 같이 돌려받아 다시 붙임 · 열쇠 = 노선 초안 + 저장 계획고) · 저장 정본 맥락(노선 계획 · 종류 · 정의 · 관 · 구조물 · 추가 측점 · 측점 간격 · 저장 종단) = 창구가 프로젝트 id 로 모음(B06_Section_Router_Calc_Context · 브라우저 정본 칸 버림 · 정본 쓰기 없음) · 묶음 refresh(입력 그대로 다시 돎) · 계획고 옮김 = 끌기 중 화면이 옮긴 입력 그대로(서버 follow 는 옮김 기준 없음) · 검증_sub3 끌기 네 걸음 뒤 서버 = 화면 0 차(관 · 입력 · 첫 계획선 · 종단 PVI 61 · 왕복 231 ms · Node 5 ms) · Node 두 단계 = 묶음 첫 바퀴 0 차(golden) · 까닭 글 follow · pair_B5 걷음 — 요구 320-4

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

resources/tester/test_511_b5_route_node.py

@@ -16,6 +16,7 @@
 
 from __future__ import annotations
 
+import asyncio
 import json
 import sys
 from pathlib import Path
@@ -319,3 +320,200 @@ def test_화면_서버_노선_화면_셈과_같음(screens, case):
     assert both["calls"] == []
     # 저장 노선(초안 없음) = 서버 안 부름 · 초안 = server 판만 서버 노선
     assert bool(server["calls"]) is (case == "draft")
+
+
+# ── follow 「서버」 — 창구 맥락 · Node route · follow 두 단계 ─────────────────────────
+
+
+def test_창구_follow_맥락_브라우저_정본칸_버림(monkeypatch):
+    from B06_Section import B06_Section_Router_Calc_Context as ctx
+
+    async def context(_pid):
+        return {"plan": {"planned": "서버"}, "saved_pipes": ["서버"], "longitudinal": None}
+
+    monkeypatch.setattr(ctx, "follow_context", context)
+    inputs = {
+        "stages": {
+            "until": "follow",
+            "input": {"route": 1},
+            "saved_edits": None,
+            "plan": {"planned": "브라우저"},
+            "saved_pipes": ["브라우저"],
+            "grid": {"path": "C:/x"},
+            "detail": {"x": 1},
+        }
+    }
+    assert asyncio.run(ctx.attach_follow_context("p", inputs)) is None
+    assert inputs["stages"] == {
+        "until": "follow",
+        "input": {"route": 1},
+        "saved_edits": None,
+        "plan": {"planned": "서버"},
+        "saved_pipes": ["서버"],
+        "longitudinal": None,
+    }
+    other = {"stages": {"plan": "브라우저"}}  # until 없음 = 그대로(B-1 단계 길)
+    assert asyncio.run(ctx.attach_follow_context("p", other)) is None and other["stages"] == {
+        "plan": "브라우저"
+    }
+
+
+def _golden_stages() -> dict:
+    from common_util.common_util_surface_sampler import dtm_grid_bytes
+
+    def fixture(name):
+        return json.loads((FIXTURE / name).read_text(encoding="utf-8"))
+
+    plan = fixture("plan.json")
+    nodes = [[n["x"], n["y"]] for n in plan["nodes"]]
+    at = len(nodes) // 2
+    nodes[at] = [nodes[at][0] + 6, nodes[at][1] + 4]  # 교각점 하나 옮긴 노선 초안
+    draft = {
+        "nodes": nodes,
+        "curveOn": [n["radius_m"] is not None for n in plan["nodes"]],
+        "curveRadius": [None] * len(nodes),
+        "curveLock": [None] * len(nodes),
+        "curveArc": [None] * len(nodes),
+        "stationSnap": bool(plan.get("station_snap")),
+        "stationSnapStep": plan.get("station_snap_step"),
+    }
+    grid = ROOT / "tmp" / "511b5_grid.bin"
+    if not grid.is_file():
+        grid.write_bytes(
+            dtm_grid_bytes(FIXTURE / "project/B04_PreProcess/models/dtm_classification_smooth.npz")
+        )
+    return {
+        "plan": plan,
+        "detail": fixture("detail.json"),
+        "types": fixture("structure_types.json")["types"],
+        "saved_pipes": [
+            {k: v for k, v in p.items() if k != "lonlat"}
+            for p in fixture("pipes.json")["pipe_points"]
+        ],
+        "saved_structures": fixture("structures.json")["structures"],
+        "interval_m": 20,
+        "grid": {"path": str(grid), "design": "las"},
+        "input": {"route": draft, "plusStations": fixture("plus_stations.json")["chainages"]},
+    }
+
+
+def test_Node_follow_두_단계_묶음_첫_바퀴와_같음():
+    from common_util import common_util_calc_runner as runner
+
+    stages = _golden_stages()
+    full = runner.run_calc_served(["stage.route", "stage.follow"], {"stages": stages})
+    only = runner.run_calc_served(
+        ["stage.route", "stage.follow"], {"stages": {**stages, "until": "follow", "grid": None}}
+    )
+    assert full and only and "error" not in full and "error" not in only, (full, only)
+    assert only["results"]["stage.route"] == full["results"]["stage.route"]
+    got = only["results"]["stage.follow"]
+    assert got["patch"] == full["results"]["stage.follow"]
+    assert got["patch"]["pipes"] and got["followed"]  # 관 따라감 · 따라가기만 한 자리 곁 자료
+
+
+# ── 화면 — follow 「서버」 끌기 여러 걸음 뒤 놓음 = 화면 셈(검증_sub3 · Playwright · 저장 안 함) ──
+
+JS_DRAG = r"""async (steps) => {
+  const urls = performance.getEntriesByType('resource').map((e) => e.name);
+  const mod = async (re) => import(urls.find((n) => re.test(n)));
+  const page = await mod(/design_pipeline_page\.ts/);
+  const pid = localStorage.getItem('frd_current_project_id');
+  const plan = await (await mod(/B05_Profile_Api_Replan\.ts/)).fetchRoutePlan(pid);
+  const flat = (await mod(/B05_Profile_UI_RouteEdit_Edits\.ts/))
+    .flattenServerPlan(plan.nodes, plan.curves ?? [], plan.node_edits);
+  const bridge = page.routeDraftBridge(pid, null);
+  const at = Math.floor(flat.planned.length / 2);
+  for (let k = 1; k <= steps; k += 1) {  // 끌기 걸음 — 걸음마다 묶음이 돎(잠잠 안 기다림)
+    const nodes = flat.planned.map(([x, y]) => [x, y]);
+    nodes[at] = [nodes[at][0] + 2 * k, nodes[at][1] + 1.5 * k];
+    bridge.edited({
+      nodes,
+      curveOn: flat.curveOn.map((on) => on !== false),
+      curveRadius: flat.curveRadius.map((r) => r ?? null),
+      curveLock: flat.curveLock ?? nodes.map(() => null),
+      curveArc: flat.curveArc ?? nodes.map(() => null),
+      stationSnap: plan.station_snap ?? false,
+      stationSnapStep: plan.station_snap_step ?? null,
+    });
+    await new Promise((r) => setTimeout(r, 60));
+  }
+  await page.pagePipeline(pid).settled();
+}"""
+
+JS_FOLLOW = r"""async () => {
+  const urls = performance.getEntriesByType('resource').map((e) => e.name);
+  const page = await import(urls.find((n) => /design_pipeline_page\.ts/.test(n)));
+  const pid = localStorage.getItem('frd_current_project_id');
+  const pipe = page.pagePipeline(pid);
+  await page.reconcilePagePipeline(pid);
+  await pipe.settled();
+  const plain = (v) => JSON.parse(JSON.stringify(v ?? null));
+  const calls = (window.__aisloCalcServer?.calls ?? []).filter((c) => c.id === 'stage.follow');
+  const planline = pipe.output('planline');
+  return {
+    follow: plain(pipe.output('follow')),
+    inputs: plain(['pipes', 'structures', 'plusStations', 'alignment']
+      .map((k) => [k, pipe.input(k)])),
+    base_pvi: plain(planline?.basePvi), pvi: plain(pipe.output('profile')?.pvi),
+    calls: calls.map((c) => ({ round: c.roundMs, node: c.nodeMs, bytes: c.bytes })),
+    runs: (window.__aisloPipeline?.runs ?? []).slice(-1).map((r) => r.outcome),
+  };
+}"""
+
+
+@pytest.fixture(scope="module")
+def drags():
+    from test_511_b1_calc_node_stages import _UP, BASE, _started
+
+    if not BASE or _UP is None or _UP != _started(BASE.replace("5178", "8005")):
+        pytest.skip("이 폴더 서버 없음")
+    sync = pytest.importorskip("playwright.sync_api")
+    cred = json.loads((ROOT / "tmp" / "aislo_cred.json").read_text(encoding="utf-8"))
+    shots = {}
+    with sync.sync_playwright() as play:
+        chrome = play.chromium.launch(channel="msedge", headless=True)
+        try:
+            for mode in ("both", "server"):
+                context = chrome.new_context(viewport={"width": 1600, "height": 1000})
+                login = {k: cred[k] for k in ("email", "password")}
+                r = context.request.post(
+                    f"{BASE}/api/auth/login/request", data=login, timeout=60000
+                )
+                assert r.ok, f"로그인 실패 {r.status}"  # 비밀번호는 안 찍음
+                if mode == "server":  # 판은 안 고침 — 이 창이 받는 판만 follow = server
+
+                    def board(route):
+                        body = route.fetch().json()
+                        body["sites"]["follow"] = "server"
+                        route.fulfill(json=body)
+
+                    context.route("**/api/dashboard/calc-sites", board)
+                page = context.new_page()
+                page.add_init_script(
+                    f"localStorage.setItem('frd_current_project_id', '{VERIFY}');"
+                    " performance.setResourceTimingBufferSize(20000);"
+                )
+                page.goto(f"{BASE}/#/b05-profile", wait_until="domcontentloaded")
+                page.wait_for_function("() => !!window.__aisloPipeline", timeout=90000)
+                page.wait_for_timeout(9000)
+                page.evaluate(JS_DRAG, 4)  # 끌기 네 걸음(세션 초안 · 창과 함께 버림)
+                page.wait_for_timeout(4000)  # 잠잠 400 ms · 서버 · 다시 돎
+                shots[mode] = page.evaluate(JS_FOLLOW)
+                context.close()
+        finally:
+            chrome.close()
+    (ROOT / "tmp" / "511b5_drags.json").write_text(json.dumps(shots), encoding="utf-8")
+    return shots
+
+
+def test_화면_follow_서버_끌기_뒤_화면_셈과_같음(drags):
+    both, server = drags["both"], drags["server"]
+    assert both["runs"] == server["runs"] == ["done"]
+    assert both["calls"] == [] and server["calls"]  # server 판만 놓은 뒤 서버 follow
+    # 계획고 옮김 = 끌기 중 화면 셈이 입력에 옮겨 둔 값 그대로(서버 follow 는 저장분에서 새로 셈 · 옮김
+    # 기준(앞 노선 · 앞 첫 계획선) 없음 → patch 에 alignment 안 냄) — 입력 · 종단은 같아야 함
+    drop = lambda patch: {k: v for k, v in patch.items() if k != "alignment"}  # noqa: E731
+    assert drop(server["follow"]) == drop(both["follow"])
+    for key in ("inputs", "base_pvi", "pvi"):
+        assert server[key] == both[key], key