feat: Enhance routing details and subcontractor mapping functionality

- Updated the `getRoutingDetails` function to enrich routing details with subcontractor codes, improving data retrieval for routing information.
- Implemented a mapping mechanism to associate subcontractor codes with routing details, ensuring accurate representation of outsourcing suppliers.
- Enhanced the `saveRoutingDetails` function to handle subcontractor mappings during the save operation, ensuring data integrity and consistency.
- Updated the BOM service to improve unit handling and added inventory unit information for better clarity in item representation.
- Refactored production plan management to streamline modal handling and improve error messaging for better user feedback.

frontend/components/common/TimelineScheduler.tsx

@@ -223,6 +223,9 @@ export default function TimelineScheduler({
 
   const gridRef = useRef<HTMLDivElement>(null);
   const scrollRef = useRef<HTMLDivElement>(null);
+  // 드래그 이동(move) 직후 자동 발생하는 click 이벤트 1회를 무시하기 위한 플래그.
+  // 드래그로 일정이 변경된 직후에 모달이 자동 오픈되면서 이전 날짜가 표시되는 버그(TASK:ERP-006) 방지용.
+  const justDraggedRef = useRef(false);
 
   // 줌 레벨 동기화
   useEffect(() => {
@@ -404,6 +407,12 @@ export default function TimelineScheduler({
           const newStart = toDateStr(addDays(origStart, dayOffset));
           const newEnd = toDateStr(addDays(origEnd, dayOffset));
           onEventMove?.(dragState.eventId, newStart, newEnd);
+          // 드래그 직후 브라우저가 자동 디스패치하는 click 이벤트 1회를 무시해
+          // 모달이 이전 날짜로 자동 오픈되는 버그(TASK:ERP-006) 방지.
+          justDraggedRef.current = true;
+          setTimeout(() => {
+            justDraggedRef.current = false;
+          }, 0);
         } else if (dragState.mode === "resize-left") {
           const newStart = toDateStr(addDays(origStart, dayOffset));
           const newEnd = dragState.origEndDate.split("T")[0];
@@ -411,12 +420,20 @@ export default function TimelineScheduler({
           if (parseDate(newStart) <= parseDate(newEnd)) {
             onEventResize?.(dragState.eventId, newStart, newEnd);
           }
+          justDraggedRef.current = true;
+          setTimeout(() => {
+            justDraggedRef.current = false;
+          }, 0);
         } else if (dragState.mode === "resize-right") {
           const newStart = dragState.origStartDate.split("T")[0];
           const newEnd = toDateStr(addDays(origEnd, dayOffset));
           if (parseDate(newStart) <= parseDate(newEnd)) {
             onEventResize?.(dragState.eventId, newStart, newEnd);
           }
+          justDraggedRef.current = true;
+          setTimeout(() => {
+            justDraggedRef.current = false;
+          }, 0);
         }
       }
 
@@ -770,6 +787,11 @@ export default function TimelineScheduler({
                           }}
                           title={`${ev.label || ""} | ${ev.startDate.split("T")[0]} ~ ${ev.endDate.split("T")[0]}${progress > 0 ? ` | ${progress}%` : ""}`}
                           onClick={(e) => {
+                            // 드래그 직후 자동 발생하는 click은 무시 (TASK:ERP-006).
+                            if (justDraggedRef.current) {
+                              e.stopPropagation();
+                              return;
+                            }
                             if (!isDragging) {
                               e.stopPropagation();
                               onEventClick?.(ev);