merge: 구조물 패널 후속 수정 4건을 통합한다

B06_Section/B06_Section_UI_Page.ts

@@ -173,22 +173,6 @@ export async function renderB06ProfileCross(root: HTMLElement): Promise<void> {
       const inletLeft = (owner.uphill_side ?? "left") === "left";
       return inletLeft ? { inlet: "좌", outlet: "우" } : { inlet: "우", outlet: "좌" };
     },
-    // 폼 단 수 ↔ 다단 채널(유출 벽 = extra, 유입·계류측 = bextra) — 좌·우가 각자 쓴다.
-    setTierCount: (chainageM, role, tiers) => {
-      const extras = Math.max(0, Math.round(tiers) - 1);
-      stationControls.extraWalls.setCount(
-        chainageM,
-        extras,
-        role === "outlet" ? "outlet" : "basin",
-      );
-    },
-    tierCount: (chainageM, role) => {
-      const owner = sectionDetail?.cross_sections.find(
-        (section) => Math.abs(section.chainage_m - chainageM) < 0.51,
-      );
-      if (!owner) return null;
-      return stationControls.extraWalls.countFor(owner, role === "outlet" ? "outlet" : "basin") + 1;
-    },
     stationInterval: () => stationInterval ?? 20,
     focusChainage: focusStationAt,
     queuePipeOptions: (chainageM, patch) => stationControls.queueCulvertOptions(chainageM, patch),