fix(B05·B06): 노선 고친 [저장] 계획고 = 서버 옮김 위에 사용자 손댐만 (PLAN 498-2 · 요구 411~417)

- 브라우저 — 노선 바뀐 [저장]의 계획고 본문 = 묶음 계획고 대 저장분 옮김(같은 carryEdits · 이 초안 첫 기준)의 다른 열쇠 · 지운 열쇠만(`gradeTouch` · `routeGradeTouch`) · 못 가르면 옛 길(노선 0 칸 통째)
- 서버 — `alignment_cleared` 가 오면 관 · 구조물 · 추가 측점 차례 뒤 새 종단 편집(서버 옮김) 위에 손댐만 얹어 한 번 저장(`touched_alignment` · 얹기 실패도 되돌림 안)
- follow 옮김 측점 = stations 단계와 같은 추가 측점(`plus` 넘김)
- 재현: 꼬리 추가 측점 ▲ 뒤 앞 교점 끌기 [저장] = 990 m 편집 버림 · ▲ 잃음 · 최대 −0.50 m → 고친 뒤 버림 0 · 끌 때 = 저장 뒤
- 시험: test_498_2_grade_touch 새로 · helper_design_store_save 에 묶음 창구 가짜 하나(옛 길)

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

B06_Section/B06_Section_Router_DesignSave.py

@@ -36,7 +36,11 @@ from B05_Profile.B05_Profile_Schema import (
 )
 from B05_Profile.B05_Profile_Structures_Schema import StructureSaveRequest
 from B06_Section import B06_Section_Router_DesignSave_Progress as progress
-from B06_Section.B06_Section_Router_DesignSave_Route import RouteCarryRequest, StepFailed
+from B06_Section.B06_Section_Router_DesignSave_Route import (
+    AlignmentCleared,
+    RouteCarryRequest,
+    StepFailed,
+)
 from B06_Section.B06_Section_Router_Stations import PlusStationsRequest
 from B06_Section.B06_Section_Schema import SectionConfirmRequest
 from common_util import common_util_save_guard as guard
@@ -70,6 +74,9 @@ class DesignSaveRequest(BaseModel):
     route: RouteSaveRequest | None = None
     #: 노선 바뀐 저장의 옛 노선 세션 칸(측점 열쇠 넘김 입력)
     carry: RouteCarryRequest | None = None
+    #: 노선 바뀐 저장의 계획고 지운 열쇠 — 오면 `alignment` = 사용자 손댐(서버 옮김 위에 얹음 ·
+    #: 498-2) · 없으면 `alignment` 통째(옛 길)
+    alignment_cleared: AlignmentCleared | None = None
 
 
 def _body(response: Any) -> dict[str, Any]:
@@ -115,7 +122,6 @@ async def _run_steps(
         get_pipe_points,
         put_pipe_points,
     )
-    from B05_Profile.B05_Profile_Router import save_profile_alignment
     from B05_Profile.B05_Profile_Router_Lifecycle import confirm_latest_route, save_page_settings
     from B05_Profile.B05_Profile_Structures_Router import write_structures
     from B06_Section.B06_Section_Router_Confirm import confirm_sections, save_sections
@@ -175,6 +181,8 @@ async def _run_steps(
         # 계획고 초안 = 새 노선에(기하 이월 · 서버가 없는 자리 버림)
         if request.alignment is not None:
             request.alignment = request.alignment.model_copy(update={"route_id": route_id})
+    # 노선 바뀜 + 손댐 = 서버 옮김(관 · 구조물 · 추가 측점 차례 뒤 새 종단 편집) 위에 손댐만(498-2)
+    touched = moved and request.alignment_cleared is not None
     if request.settings is not None:
         await step("settings", save_page_settings(project_id, request.settings))
     if request.pipes is not None or request.confirm:
@@ -192,7 +200,12 @@ async def _run_steps(
     if request.plus_stations is not None:
         await step("plusStations", put_plus_stations(project_id, request.plus_stations))
     if request.alignment is not None:
-        await step("alignment", save_profile_alignment(project_id, request.alignment))
+        alignment = request.alignment
+        if touched:
+            alignment = moving.touched_alignment(
+                project_id, route_id, alignment, request.alignment_cleared
+            )
+        await step("alignment", _save_alignment(project_id, alignment))
     if request.culvert_options:
         stored = await step("culvertOptions", get_pipe_points(project_id))
         points = _patched_points(stored, request.culvert_options)
@@ -241,6 +254,15 @@ async def _run_steps(
     return out
 
 
+async def _save_alignment(project_id: UUID, alignment: Any) -> Any:
+    """계획고 차례 — 본문(또는 본문을 내는 약속 · 노선 바뀐 손댐 얹기 · 498-2)을 저장."""
+    from B05_Profile.B05_Profile_Router import save_profile_alignment
+
+    if not isinstance(alignment, ProfileAlignmentSaveRequest):
+        alignment = await alignment
+    return await save_profile_alignment(project_id, alignment)
+
+
 async def _save_stages(project_id: str) -> None:
     """B05 · B06 한 본문 [저장] — 단계 2 · 3(실패면 한 본문 되돌림이 단계 행도 되살림)."""
     from common_util.common_util_workflow_state import mark_stage