diff --git a/resources/tester/helper_323_9_save_redraw.cjs b/resources/tester/helper_323_9_save_redraw.cjs
index c8bb2a808..0a6d2d843 100644
--- a/resources/tester/helper_323_9_save_redraw.cjs
+++ b/resources/tester/helper_323_9_save_redraw.cjs
@@ -2,25 +2,12 @@
  * `B06_Section_UI_Page_Persist.ts`(횡단 뒤처리) · `B06_Section_Section_Store.ts`(상세 캐시)를 Node 로 돌림.
  * 서버 창구만 가짜 — 상세는 저장 전(옛 자리) · 저장 뒤(새 자리) 두 벌.
  */
-const fs = require("fs");
 const path = require("path");
-const ts = require(path.join(__dirname, "..", "..", "config", "node_modules", "typescript"));
+const { makeLoader, memoryStorage } = require("./helper_ts_stub_loader.cjs");
 const CATALOG = require("./helper_322_catalog_module.cjs"); // 구조물 표(322-1)
 
 const ROOT = path.join(__dirname, "..", "..");
-const memory = () => {
-  const map = new Map();
-  return {
-    getItem: (key) => (map.has(key) ? map.get(key) : null),
-    setItem: (key, value) => map.set(key, String(value)),
-    removeItem: (key) => map.delete(key),
-    key: (index) => [...map.keys()][index] ?? null,
-    get length() {
-      return map.size;
-    },
-  };
-};
-globalThis.window = { sessionStorage: memory(), localStorage: memory() };
+globalThis.window = { sessionStorage: memoryStorage(), localStorage: memoryStorage() };
 globalThis.sessionStorage = globalThis.window.sessionStorage;
 
 const calls = [];
@@ -66,29 +53,27 @@ STUBS[path.join(ROOT, "A00_Common", "design", "design_save_api.ts")] = {
   },
 };
 
-const cache = new Map();
-function loadTs(file) {
-  const full = path.resolve(file);
-  if (STUBS[full]) return STUBS[full];
-  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) => {
+// 라우터(302-1 draft 길 `import.meta.glob`) — 이 로더로 못 읽음 · 저장 차례는 지금 길만 봄
+STUBS[path.join(ROOT, "A00_Common", "router.ts")] = {
+  currentRoute: () => "",
+  remountRoute: () => undefined,
+  navigateTo: () => undefined,
+  setLeaveGuard: () => undefined,
+};
+const anyModule = () => new Proxy({}, { get: () => () => undefined });
+const { loadTs } = makeLoader({
+  root: ROOT,
+  fileStub: (full) => STUBS[full],
+  requireFor: (full) => (request) => {
     if (STUBS[request]) return STUBS[request];
     if (CATALOG.isCatalogRequest(request)) return CATALOG;
     if (request.endsWith(".json")) return require(path.join(path.dirname(full), request));
     if (request.endsWith(".css")) return {};
     if (request.startsWith(".")) return loadTs(path.join(path.dirname(full), `${request}.ts`));
-    if (request.startsWith("@")) return new Proxy({}, { get: () => () => undefined });
+    if (request.startsWith("@")) return anyModule();
     return require(request);
-  };
-  new Function("exports", "module", "require", js)(box.exports, box, localRequire);
-  cache.set(full, box.exports);
-  return box.exports;
-}
+  },
+});
 
 // 측점 열쇠 한 벌(344-3 · 346-2)은 진짜로 — 빈 대역은 열쇠 목록을 못 냄
 STUBS["@util/common_util_station_key"] = loadTs(
diff --git a/resources/tester/helper_398_2_curve_input.cjs b/resources/tester/helper_398_2_curve_input.cjs
index 659ac5430..fa6d9c201 100644
--- a/resources/tester/helper_398_2_curve_input.cjs
+++ b/resources/tester/helper_398_2_curve_input.cjs
@@ -3,13 +3,11 @@
  * 같은 길(스냅 켬 = `fitCurveStations` → 길이 고정 R · 하한 → `buildEditedPolyline`)로 흉내.
  *   node helper_398_2_curve_input.cjs
  */
-const fs = require("fs");
 const path = require("path");
-const ts = require(path.join(__dirname, "..", "..", "config", "node_modules", "typescript"));
+const { makeLoader } = require("./helper_ts_stub_loader.cjs");
 
 const ROOT = path.join(__dirname, "..", "..");
 const B05 = path.join(ROOT, "B05_Profile");
-const cache = new Map();
 let handlers = null;
 const shows = [];
 const STUBS = {
@@ -23,23 +21,13 @@ const STUBS = {
   "@ui/ui_template_elements": { showToast: () => {} }, // 곡선 삭제 경고(430)
 };
 
-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) =>
-    STUBS[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;
-}
+// 곡선 판 가둠(505-3) — 판 크기 감시 · 가짜 그릇엔 판이 없어 빈 감시
+globalThis.ResizeObserver = class {
+  observe() {}
+  disconnect() {}
+};
+
+const { loadTs } = makeLoader({ root: ROOT, stubs: STUBS });
 
 const curve = loadTs(path.join(B05, "logic", "B05_Profile_UI_RouteEdit_Curve.ts"));
 const edits = loadTs(path.join(B05, "logic", "B05_Profile_UI_RouteEdit_Edits.ts"));
@@ -101,7 +89,12 @@ function editor(snap) {
     status.textContent = `예상노선 — ${message} 꼬리`;
   };
   made = bar.createCurveBar({
-    canvas: { getBoundingClientRect: () => ({ left: 0, top: 0, right: 800, bottom: 600 }) },
+    canvas: {
+      getBoundingClientRect: () => ({ left: 0, top: 0, right: 800, bottom: 600 }),
+      closest: () => null,
+      parentElement: null,
+      isConnected: true,
+    },
     container: { querySelector: (sel) => (sel === ".b05-routeedit__status" ? status : null) },
     state: () => state,
     toScreen: (v) => [v[0], v[1]],
diff --git a/resources/tester/helper_408_radius_downstream.cjs b/resources/tester/helper_408_radius_downstream.cjs
index 6f53ddc1b..1852090c1 100644
--- a/resources/tester/helper_408_radius_downstream.cjs
+++ b/resources/tester/helper_408_radius_downstream.cjs
@@ -3,13 +3,11 @@
  * 같은 길(스냅 켬 = `fitStart` → `fitCurveStations` → 길이 고정 R · 하한 → `buildEditedPolyline`)로 흉내.
  *   node helper_408_radius_downstream.cjs
  */
-const fs = require("fs");
 const path = require("path");
-const ts = require(path.join(__dirname, "..", "..", "config", "node_modules", "typescript"));
+const { makeLoader } = require("./helper_ts_stub_loader.cjs");
 
 const ROOT = path.join(__dirname, "..", "..");
 const B05 = path.join(ROOT, "B05_Profile");
-const cache = new Map();
 let handlers = null;
 const STUBS = {
   "./B05_Profile_UI_RouteEdit_Label": {
@@ -22,23 +20,13 @@ const STUBS = {
   "@ui/ui_template_elements": { showToast: () => {} }, // 곡선 삭제 경고(430)
 };
 
-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) =>
-    STUBS[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;
-}
+// 곡선 판 가둠(505-3) — 판 크기 감시 · 가짜 그릇엔 판이 없어 빈 감시
+globalThis.ResizeObserver = class {
+  observe() {}
+  disconnect() {}
+};
+
+const { loadTs } = makeLoader({ root: ROOT, stubs: STUBS });
 
 const curve = loadTs(path.join(B05, "logic", "B05_Profile_UI_RouteEdit_Curve.ts"));
 const edits = loadTs(path.join(B05, "logic", "B05_Profile_UI_RouteEdit_Edits.ts"));
@@ -108,7 +96,12 @@ function editor(snap, apexLock = []) {
     committed = copy(state);
   };
   bar.createCurveBar({
-    canvas: { getBoundingClientRect: () => ({ left: 0, top: 0, right: 800, bottom: 600 }) },
+    canvas: {
+      getBoundingClientRect: () => ({ left: 0, top: 0, right: 800, bottom: 600 }),
+      closest: () => null,
+      parentElement: null,
+      isConnected: true,
+    },
     container: { querySelector: (sel) => (sel === ".b05-routeedit__status" ? status : null) },
     state: () => state,
     toScreen: (v) => [v[0], v[1]],
diff --git a/resources/tester/helper_54_9_etc_pill.cjs b/resources/tester/helper_54_9_etc_pill.cjs
index 807b5d93f..605c613fa 100644
--- a/resources/tester/helper_54_9_etc_pill.cjs
+++ b/resources/tester/helper_54_9_etc_pill.cjs
@@ -3,19 +3,12 @@
  *
  * ⚠ 확장자가 `.cjs` 인 까닭은 `helper_b05_structures_form_summary.cjs` 머리와 같다.
  */
-const fs = require("fs");
 const path = require("path");
-const ts = require(path.join(__dirname, "..", "..", "config", "node_modules", "typescript"));
+const { makeLoader, memoryStorage } = require("./helper_ts_stub_loader.cjs");
 
 const ROOT = path.join(__dirname, "..", "..");
-const cache = new Map();
 
-const session = new Map();
-const fakeStorage = {
-  getItem: (k) => session.get(k) ?? null,
-  setItem: (k, v) => session.set(k, String(v)),
-  removeItem: (k) => session.delete(k),
-};
+const fakeStorage = memoryStorage();
 globalThis.window = { sessionStorage: fakeStorage, localStorage: fakeStorage };
 globalThis.sessionStorage = fakeStorage;
 globalThis.localStorage = fakeStorage;
@@ -24,25 +17,7 @@ const STUBS = {
   "@config/config_frontend": { API_BASE_URL: "/api", API_TIMEOUT_MS: 1000 },
 };
 
-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) => {
-    if (STUBS[request]) return STUBS[request];
-    if (request.endsWith(".json")) return require(path.join(path.dirname(full), request));
-    if (request.startsWith(".")) return loadTs(path.join(path.dirname(full), `${request}.ts`));
-    if (request.startsWith("@")) return new Proxy({}, { get: () => () => {} });
-    return require(request);
-  };
-  new Function("exports", "module", "require", js)(box.exports, box, localRequire);
-  cache.set(full, box.exports);
-  return box.exports;
-}
+const { loadTs } = makeLoader({ root: ROOT, stubs: STUBS });
 
 const marks = loadTs(path.join(ROOT, "B05_Profile", "B05_Profile_UI_Structures_Marks.ts"));
 
diff --git a/resources/tester/test_323_9_save_redraw.py b/resources/tester/test_323_9_save_redraw.py
index a9d92f71d..ebf2504a9 100644
--- a/resources/tester/test_323_9_save_redraw.py
+++ b/resources/tester/test_323_9_save_redraw.py
@@ -42,13 +42,11 @@ def test_after_save_cards_show_server_new_detail(out: dict) -> None:
 
 def test_no_redraw_from_stale_cache_while_saving(out: dict) -> None:
     assert out["savingSeen"] == [True, False] and out["savingIdle"] is False
-    # 저장 도중 신호는 건너뜀 · 뒤처리가 새로 한 번 받음(오버레이 안)
+    # 저장 도중 신호는 건너뜀 · 뒤처리가 새로 한 번 받음 · 노선 그대로 [저장] = 가림막 없음(498-3 D1)
     assert out["calls"] == [
-        "overlay:on",
         "refresh:skip",
         "cross:save",
         "fetch:새 자리 4+8 · 47+0",
-        "overlay:off",
     ]
 
 
diff --git a/resources/tester/test_app_settings.py b/resources/tester/test_app_settings.py
index a453f953a..071a1f6b1 100644
--- a/resources/tester/test_app_settings.py
+++ b/resources/tester/test_app_settings.py
@@ -53,7 +53,7 @@ def node() -> dict:
 
 
 def test_별칭_검사(node):
-    assert node["commands"] == 153
+    assert node["commands"] == 154  # 488-3 IMPORT 더함
     assert node["parse"] == [["LL", "CC", "X1"], [], []]
     assert node["ok"] == {}  # 남의 기본 별칭(C = CIRCLE)을 내 것으로 덮는 건 됨(acad.pgp 식)
     assert node["chars"] == {"LINE": "chars", "CIRCLE": "chars"}
@@ -140,7 +140,7 @@ def test_설정_창_탭_저장_물음():
         page.click("[data-settings-tab=cad]")
         assert _visible_panel_has(page, "input[data-cad-command]")
         assert not _visible_panel_has(page, "input[type=radio]")
-        assert page.locator(".app-settings input[data-cad-command]").count() == 153
+        assert page.locator(".app-settings input[data-cad-command]").count() == 154
         page.click("[data-settings-tab=keys]")
         assert (
             page.evaluate(