Merge remote-tracking branch 'origin/sub_laptop_5' into sub_laptop_4

B05_Profile/B05_Profile_UI_Drainage_Panel.ts

@@ -421,7 +421,7 @@ export function createDrainagePanel(callbacks: DrainagePanelCallbacks = {}): Dra
   const loadSaved = (): Promise<void> =>
     run(() => {
       const pending = readPendingPipes(projectId as string);
-      return pending?.length
+      return pending !== null // 빈 목록 = 다 지움(관 0개 · 312) — 저장분으로 안 넘어감
         ? computeDetailBasins(projectId as string, pending)
         : fetchDetailPipePoints(projectId as string);
     });