backend-node/src/services/tableManagementService.ts

@@ -3463,10 +3463,12 @@ export class TableManagementService {
       }
 
       // ORDER BY 절 구성
-      // sortBy가 없으면 created_date 컬럼이 있는 경우에만 기본 정렬 적용
+      // sortBy가 메인 테이블 컬럼이면 main. 접두사, 조인 별칭이면 접두사 없이 사용
       const hasCreatedDateColumn = selectColumns.includes("created_date");
       const orderBy = options.sortBy
-        ? `main."${options.sortBy}" ${options.sortOrder === "desc" ? "DESC" : "ASC"}`
+        ? selectColumns.includes(options.sortBy)
+          ? `main."${options.sortBy}" ${options.sortOrder === "desc" ? "DESC" : "ASC"}`
+          : `"${options.sortBy}" ${options.sortOrder === "desc" ? "DESC" : "ASC"}`
         : hasCreatedDateColumn
           ? `main."created_date" DESC`
           : "";
@@ -3710,7 +3712,9 @@ export class TableManagementService {
             selectColumns,
             "", // WHERE 절은 나중에 추가
             options.sortBy
-              ? `main."${options.sortBy}" ${options.sortOrder || "ASC"}`
+              ? selectColumns.includes(options.sortBy)
+                ? `main."${options.sortBy}" ${options.sortOrder || "ASC"}`
+                : `"${options.sortBy}" ${options.sortOrder || "ASC"}`
               : hasCreatedDateForSearch
                 ? `main."created_date" DESC`
                 : undefined,
@@ -3901,7 +3905,9 @@ export class TableManagementService {
           const whereClause = whereConditions.join(" AND ");
           const hasCreatedDateForOrder = selectColumns.includes("created_date");
           const orderBy = options.sortBy
-            ? `main."${options.sortBy}" ${options.sortOrder === "desc" ? "DESC" : "ASC"}`
+            ? selectColumns.includes(options.sortBy)
+              ? `main."${options.sortBy}" ${options.sortOrder === "desc" ? "DESC" : "ASC"}`
+              : `"${options.sortBy}" ${options.sortOrder === "desc" ? "DESC" : "ASC"}`
             : hasCreatedDateForOrder
               ? `main."created_date" DESC`
               : "";

frontend/components/common/ExcelUploadModal.tsx

@@ -27,6 +27,7 @@ import {
   ArrowRight,
   Zap,
   Copy,
+  Loader2,
 } from "lucide-react";
 import { Checkbox } from "@/components/ui/checkbox";
 import { importFromExcel, getExcelSheetNames } from "@/lib/utils/excelExport";
@@ -35,6 +36,8 @@ import { getTableSchema, TableColumn } from "@/lib/api/tableSchema";
 import { cn } from "@/lib/utils";
 import { findMappingByColumns, saveMappingTemplate } from "@/lib/api/excelMapping";
 import { EditableSpreadsheet } from "./EditableSpreadsheet";
+import { getCategoryValues } from "@/lib/api/tableCategoryValue";
+import { getTableColumns } from "@/lib/api/tableManagement";
 
 // 마스터-디테일 엑셀 업로드 설정 (버튼 설정에서 설정)
 export interface MasterDetailExcelConfig {
@@ -133,6 +136,19 @@ export const ExcelUploadModal: React.FC<ExcelUploadModalProps> = ({
   // 중복 처리 방법 (전역 설정)
   const [duplicateAction, setDuplicateAction] = useState<"overwrite" | "skip">("skip");
 
+  // 카테고리 검증 관련
+  const [showCategoryValidation, setShowCategoryValidation] = useState(false);
+  const [isCategoryValidating, setIsCategoryValidating] = useState(false);
+  // { [columnName]: { invalidValue: string, replacement: string | null, validOptions: {code: string, label: string}[], rowIndices: number[] }[] }
+  const [categoryMismatches, setCategoryMismatches] = useState<
+    Record<string, Array<{
+      invalidValue: string;
+      replacement: string | null;
+      validOptions: Array<{ code: string; label: string }>;
+      rowIndices: number[];
+    }>>
+  >({});
+
   // 3단계: 확인
   const [isUploading, setIsUploading] = useState(false);
 
@@ -601,8 +617,177 @@ export const ExcelUploadModal: React.FC<ExcelUploadModalProps> = ({
   // 중복 체크 설정된 컬럼 수
   const duplicateCheckCount = columnMappings.filter((m) => m.checkDuplicate && m.systemColumn).length;
 
+  // 카테고리 컬럼 검증: 엑셀 데이터에서 유효하지 않은 카테고리 값 감지
+  const validateCategoryColumns = async () => {
+    try {
+      setIsCategoryValidating(true);
+
+      const targetTableName = isMasterDetail && masterDetailRelation
+        ? masterDetailRelation.detailTable
+        : tableName;
+
+      // 테이블의 카테고리 타입 컬럼 조회
+      const colResponse = await getTableColumns(targetTableName);
+      if (!colResponse.success || !colResponse.data?.columns) {
+        return null;
+      }
+
+      const categoryColumns = colResponse.data.columns.filter(
+        (col: any) => col.inputType === "category"
+      );
+
+      if (categoryColumns.length === 0) {
+        return null;
+      }
+
+      // 매핑된 컬럼 중 카테고리 타입인 것 찾기
+      const mappedCategoryColumns: Array<{
+        systemCol: string;
+        excelCol: string;
+        displayName: string;
+      }> = [];
+
+      for (const mapping of columnMappings) {
+        if (!mapping.systemColumn) continue;
+        const rawName = mapping.systemColumn.includes(".")
+          ? mapping.systemColumn.split(".")[1]
+          : mapping.systemColumn;
+
+        const catCol = categoryColumns.find(
+          (cc: any) => (cc.columnName || cc.column_name) === rawName
+        );
+        if (catCol) {
+          mappedCategoryColumns.push({
+            systemCol: rawName,
+            excelCol: mapping.excelColumn,
+            displayName: catCol.displayName || catCol.display_name || rawName,
+          });
+        }
+      }
+
+      if (mappedCategoryColumns.length === 0) {
+        return null;
+      }
+
+      // 각 카테고리 컬럼의 유효값 조회 및 엑셀 데이터 검증
+      const mismatches: typeof categoryMismatches = {};
+
+      for (const catCol of mappedCategoryColumns) {
+        const valuesResponse = await getCategoryValues(targetTableName, catCol.systemCol);
+        if (!valuesResponse.success || !valuesResponse.data) continue;
+
+        const validValues = valuesResponse.data as Array<{
+          valueCode: string;
+          valueLabel: string;
+        }>;
+
+        // 유효한 코드와 라벨 Set 생성
+        const validCodes = new Set(validValues.map((v) => v.valueCode));
+        const validLabels = new Set(validValues.map((v) => v.valueLabel));
+        const validLabelsLower = new Set(validValues.map((v) => v.valueLabel.toLowerCase()));
+
+        // 엑셀 데이터에서 유효하지 않은 값 수집
+        const invalidMap = new Map<string, number[]>();
+
+        allData.forEach((row, rowIdx) => {
+          const val = row[catCol.excelCol];
+          if (val === undefined || val === null || String(val).trim() === "") return;
+          const strVal = String(val).trim();
+
+          // 코드 매칭 → 라벨 매칭 → 소문자 라벨 매칭
+          if (validCodes.has(strVal)) return;
+          if (validLabels.has(strVal)) return;
+          if (validLabelsLower.has(strVal.toLowerCase())) return;
+
+          if (!invalidMap.has(strVal)) {
+            invalidMap.set(strVal, []);
+          }
+          invalidMap.get(strVal)!.push(rowIdx);
+        });
+
+        if (invalidMap.size > 0) {
+          const options = validValues.map((v) => ({
+            code: v.valueCode,
+            label: v.valueLabel,
+          }));
+
+          mismatches[`${catCol.systemCol}|||${catCol.displayName}`] = Array.from(invalidMap.entries()).map(
+            ([invalidValue, rowIndices]) => ({
+              invalidValue,
+              replacement: null,
+              validOptions: options,
+              rowIndices,
+            })
+          );
+        }
+      }
+
+      if (Object.keys(mismatches).length > 0) {
+        return mismatches;
+      }
+      return null;
+    } catch (error) {
+      console.error("카테고리 검증 실패:", error);
+      return null;
+    } finally {
+      setIsCategoryValidating(false);
+    }
+  };
+
+  // 카테고리 대체값 선택 후 데이터에 적용
+  const applyCategoryReplacements = () => {
+    // 모든 대체값이 선택되었는지 확인
+    for (const [key, items] of Object.entries(categoryMismatches)) {
+      for (const item of items) {
+        if (item.replacement === null) {
+          toast.error("모든 항목의 대체 값을 선택해주세요.");
+          return false;
+        }
+      }
+    }
+
+    // 엑셀 컬럼명 → 시스템 컬럼명 매핑 구축
+    const systemToExcelMap = new Map<string, string>();
+    for (const mapping of columnMappings) {
+      if (!mapping.systemColumn) continue;
+      const rawName = mapping.systemColumn.includes(".")
+        ? mapping.systemColumn.split(".")[1]
+        : mapping.systemColumn;
+      systemToExcelMap.set(rawName, mapping.excelColumn);
+    }
+
+    const newData = allData.map((row) => ({ ...row }));
+
+    for (const [key, items] of Object.entries(categoryMismatches)) {
+      const systemCol = key.split("|||")[0];
+      const excelCol = systemToExcelMap.get(systemCol);
+      if (!excelCol) continue;
+
+      for (const item of items) {
+        if (!item.replacement) continue;
+        // 선택된 대체값의 라벨 찾기
+        const selectedOption = item.validOptions.find((opt) => opt.code === item.replacement);
+        const replacementLabel = selectedOption?.label || item.replacement;
+
+        for (const rowIdx of item.rowIndices) {
+          if (newData[rowIdx]) {
+            newData[rowIdx][excelCol] = replacementLabel;
+          }
+        }
+      }
+    }
+
+    setAllData(newData);
+    setDisplayData(newData);
+    setShowCategoryValidation(false);
+    setCategoryMismatches({});
+    toast.success("카테고리 값이 대체되었습니다.");
+    setCurrentStep(3);
+    return true;
+  };
+
   // 다음 단계
-  const handleNext = () => {
+  const handleNext = async () => {
     if (currentStep === 1 && !file) {
       toast.error("파일을 선택해주세요.");
       return;
@@ -655,7 +840,7 @@ export const ExcelUploadModal: React.FC<ExcelUploadModalProps> = ({
       }
     }
 
-    // 2단계 → 3단계 전환 시: NOT NULL 컬럼 매핑 필수 검증
+    // 2단계 → 3단계 전환 시: NOT NULL 컬럼 매핑 필수 검증 + 카테고리 검증
     if (currentStep === 2) {
       // 매핑된 시스템 컬럼 (원본 이름 그대로 + dot 뒤 이름 둘 다 저장)
       const mappedSystemCols = new Set<string>();
@@ -681,6 +866,14 @@ export const ExcelUploadModal: React.FC<ExcelUploadModalProps> = ({
         toast.error(`필수(NOT NULL) 컬럼이 매핑되지 않았습니다: ${colNames}`);
         return;
       }
+
+      // 카테고리 컬럼 검증
+      const mismatches = await validateCategoryColumns();
+      if (mismatches) {
+        setCategoryMismatches(mismatches);
+        setShowCategoryValidation(true);
+        return;
+      }
     }
 
     setCurrentStep((prev) => Math.min(prev + 1, 3));
@@ -1108,12 +1301,17 @@ export const ExcelUploadModal: React.FC<ExcelUploadModalProps> = ({
       setSystemColumns([]);
       setColumnMappings([]);
       setDuplicateAction("skip");
+      // 카테고리 검증 초기화
+      setShowCategoryValidation(false);
+      setCategoryMismatches({});
+      setIsCategoryValidating(false);
       // 🆕 마스터-디테일 모드 초기화
       setMasterFieldValues({});
     }
   }, [open]);
 
   return (
+    <>
     <Dialog open={open} onOpenChange={onOpenChange}>
       <DialogContent
         className="max-h-[95vh] max-w-[95vw] sm:max-w-[1200px]"
@@ -1750,10 +1948,17 @@ export const ExcelUploadModal: React.FC<ExcelUploadModalProps> = ({
           {currentStep < 3 ? (
             <Button
               onClick={handleNext}
-              disabled={isUploading || (currentStep === 1 && !file)}
+              disabled={isUploading || isCategoryValidating || (currentStep === 1 && !file)}
               className="h-8 flex-1 text-xs sm:h-10 sm:flex-none sm:text-sm"
             >
-              다음
+              {isCategoryValidating ? (
+                <>
+                  <Loader2 className="mr-2 h-4 w-4 animate-spin" />
+                  검증 중...
+                </>
+              ) : (
+                "다음"
+              )}
             </Button>
           ) : (
             <Button
@@ -1769,5 +1974,112 @@ export const ExcelUploadModal: React.FC<ExcelUploadModalProps> = ({
         </DialogFooter>
       </DialogContent>
     </Dialog>
+
+    {/* 카테고리 대체값 선택 다이얼로그 */}
+    <Dialog open={showCategoryValidation} onOpenChange={(open) => {
+      if (!open) {
+        setShowCategoryValidation(false);
+        setCategoryMismatches({});
+      }
+    }}>
+      <DialogContent className="max-w-[95vw] sm:max-w-[600px]">
+        <DialogHeader>
+          <DialogTitle className="flex items-center gap-2 text-base sm:text-lg">
+            <AlertCircle className="h-5 w-5 text-warning" />
+            존재하지 않는 카테고리 값 감지
+          </DialogTitle>
+          <DialogDescription className="text-xs sm:text-sm">
+            엑셀 데이터에 등록되지 않은 카테고리 값이 있습니다. 각 항목에 대해 대체할 값을 선택해주세요.
+          </DialogDescription>
+        </DialogHeader>
+
+        <div className="max-h-[400px] space-y-4 overflow-y-auto pr-1">
+          {Object.entries(categoryMismatches).map(([key, items]) => {
+            const [columnName, displayName] = key.split("|||");
+            return (
+              <div key={key} className="space-y-2">
+                <h4 className="text-sm font-semibold text-foreground">
+                  {displayName || columnName}
+                </h4>
+                {items.map((item, idx) => (
+                  <div
+                    key={`${key}-${idx}`}
+                    className="grid grid-cols-[1fr_auto_1fr] items-center gap-2 rounded-md border border-border bg-muted/30 p-2"
+                  >
+                    <div className="flex flex-col">
+                      <span className="text-xs font-medium text-destructive line-through">
+                        {item.invalidValue}
+                      </span>
+                      <span className="text-[10px] text-muted-foreground">
+                        {item.rowIndices.length}건
+                      </span>
+                    </div>
+                    <ArrowRight className="h-4 w-4 text-muted-foreground" />
+                    <Select
+                      value={item.replacement || ""}
+                      onValueChange={(val) => {
+                        setCategoryMismatches((prev) => {
+                          const updated = { ...prev };
+                          updated[key] = updated[key].map((it, i) =>
+                            i === idx ? { ...it, replacement: val } : it
+                          );
+                          return updated;
+                        });
+                      }}
+                    >
+                      <SelectTrigger className="h-8 text-xs sm:h-9 sm:text-sm">
+                        <SelectValue placeholder="대체 값 선택" />
+                      </SelectTrigger>
+                      <SelectContent>
+                        {item.validOptions.map((opt) => (
+                          <SelectItem
+                            key={opt.code}
+                            value={opt.code}
+                            className="text-xs sm:text-sm"
+                          >
+                            {opt.label}
+                          </SelectItem>
+                        ))}
+                      </SelectContent>
+                    </Select>
+                  </div>
+                ))}
+              </div>
+            );
+          })}
+        </div>
+
+        <DialogFooter className="gap-2 sm:gap-0">
+          <Button
+            variant="outline"
+            onClick={() => {
+              setShowCategoryValidation(false);
+              setCategoryMismatches({});
+            }}
+            className="h-8 flex-1 text-xs sm:h-10 sm:flex-none sm:text-sm"
+          >
+            취소
+          </Button>
+          <Button
+            variant="outline"
+            onClick={() => {
+              setShowCategoryValidation(false);
+              setCategoryMismatches({});
+              setCurrentStep(3);
+            }}
+            className="h-8 flex-1 text-xs sm:h-10 sm:flex-none sm:text-sm"
+          >
+            무시하고 진행
+          </Button>
+          <Button
+            onClick={applyCategoryReplacements}
+            className="h-8 flex-1 text-xs sm:h-10 sm:flex-none sm:text-sm"
+          >
+            적용
+          </Button>
+        </DialogFooter>
+      </DialogContent>
+    </Dialog>
+  </>
   );
 };

frontend/components/common/MultiTableExcelUploadModal.tsx

@@ -36,6 +36,8 @@ import {
   TableChainConfig,
   uploadMultiTableExcel,
 } from "@/lib/api/multiTableExcel";
+import { getCategoryValues } from "@/lib/api/tableCategoryValue";
+import { getTableColumns } from "@/lib/api/tableManagement";
 
 export interface MultiTableExcelUploadModalProps {
   open: boolean;
@@ -79,6 +81,18 @@ export const MultiTableExcelUploadModal: React.FC<MultiTableExcelUploadModalProp
   // 업로드
   const [isUploading, setIsUploading] = useState(false);
 
+  // 카테고리 검증 관련
+  const [showCategoryValidation, setShowCategoryValidation] = useState(false);
+  const [isCategoryValidating, setIsCategoryValidating] = useState(false);
+  const [categoryMismatches, setCategoryMismatches] = useState<
+    Record<string, Array<{
+      invalidValue: string;
+      replacement: string | null;
+      validOptions: Array<{ code: string; label: string }>;
+      rowIndices: number[];
+    }>>
+  >({});
+
   const selectedMode = config.uploadModes.find((m) => m.id === selectedModeId);
 
   // 선택된 모드에서 활성화되는 컬럼 목록
@@ -302,8 +316,161 @@ export const MultiTableExcelUploadModal: React.FC<MultiTableExcelUploadModalProp
     }
   };
 
+  // 카테고리 검증: 매핑된 컬럼 중 카테고리 타입인 것의 유효하지 않은 값 감지
+  const validateCategoryColumns = async () => {
+    try {
+      setIsCategoryValidating(true);
+
+      if (!selectedMode) return null;
+
+      const mismatches: typeof categoryMismatches = {};
+
+      // 활성 레벨별로 카테고리 컬럼 검증
+      for (const levelIdx of selectedMode.activeLevels) {
+        const level = config.levels[levelIdx];
+        if (!level) continue;
+
+        // 해당 테이블의 카테고리 타입 컬럼 조회
+        const colResponse = await getTableColumns(level.tableName);
+        if (!colResponse.success || !colResponse.data?.columns) continue;
+
+        const categoryColumns = colResponse.data.columns.filter(
+          (col: any) => col.inputType === "category"
+        );
+        if (categoryColumns.length === 0) continue;
+
+        // 매핑된 컬럼 중 카테고리 타입인 것 찾기
+        for (const catCol of categoryColumns) {
+          const catColName = catCol.columnName || catCol.column_name;
+          const catDisplayName = catCol.displayName || catCol.display_name || catColName;
+
+          // level.columns에서 해당 dbColumn 찾기
+          const levelCol = level.columns.find((lc) => lc.dbColumn === catColName);
+          if (!levelCol) continue;
+
+          // 매핑에서 해당 excelHeader에 연결된 엑셀 컬럼 찾기
+          const mapping = columnMappings.find((m) => m.targetColumn === levelCol.excelHeader);
+          if (!mapping) continue;
+
+          // 유효한 카테고리 값 조회
+          const valuesResponse = await getCategoryValues(level.tableName, catColName);
+          if (!valuesResponse.success || !valuesResponse.data) continue;
+
+          const validValues = valuesResponse.data as Array<{
+            valueCode: string;
+            valueLabel: string;
+          }>;
+
+          const validCodes = new Set(validValues.map((v) => v.valueCode));
+          const validLabels = new Set(validValues.map((v) => v.valueLabel));
+          const validLabelsLower = new Set(validValues.map((v) => v.valueLabel.toLowerCase()));
+
+          // 엑셀 데이터에서 유효하지 않은 값 수집
+          const invalidMap = new Map<string, number[]>();
+
+          allData.forEach((row, rowIdx) => {
+            const val = row[mapping.excelColumn];
+            if (val === undefined || val === null || String(val).trim() === "") return;
+            const strVal = String(val).trim();
+
+            if (validCodes.has(strVal)) return;
+            if (validLabels.has(strVal)) return;
+            if (validLabelsLower.has(strVal.toLowerCase())) return;
+
+            if (!invalidMap.has(strVal)) {
+              invalidMap.set(strVal, []);
+            }
+            invalidMap.get(strVal)!.push(rowIdx);
+          });
+
+          if (invalidMap.size > 0) {
+            const options = validValues.map((v) => ({
+              code: v.valueCode,
+              label: v.valueLabel,
+            }));
+
+            const key = `${catColName}|||[${level.label}] ${catDisplayName}`;
+            mismatches[key] = Array.from(invalidMap.entries()).map(
+              ([invalidValue, rowIndices]) => ({
+                invalidValue,
+                replacement: null,
+                validOptions: options,
+                rowIndices,
+              })
+            );
+          }
+        }
+      }
+
+      if (Object.keys(mismatches).length > 0) {
+        return mismatches;
+      }
+      return null;
+    } catch (error) {
+      console.error("카테고리 검증 실패:", error);
+      return null;
+    } finally {
+      setIsCategoryValidating(false);
+    }
+  };
+
+  // 카테고리 대체값 적용
+  const applyCategoryReplacements = () => {
+    for (const [, items] of Object.entries(categoryMismatches)) {
+      for (const item of items) {
+        if (item.replacement === null) {
+          toast.error("모든 항목의 대체 값을 선택해주세요.");
+          return false;
+        }
+      }
+    }
+
+    // 시스템 컬럼명 → 엑셀 컬럼명 역매핑 구축
+    const dbColToExcelCol = new Map<string, string>();
+    if (selectedMode) {
+      for (const levelIdx of selectedMode.activeLevels) {
+        const level = config.levels[levelIdx];
+        if (!level) continue;
+        for (const lc of level.columns) {
+          const mapping = columnMappings.find((m) => m.targetColumn === lc.excelHeader);
+          if (mapping) {
+            dbColToExcelCol.set(lc.dbColumn, mapping.excelColumn);
+          }
+        }
+      }
+    }
+
+    const newData = allData.map((row) => ({ ...row }));
+
+    for (const [key, items] of Object.entries(categoryMismatches)) {
+      const systemCol = key.split("|||")[0];
+      const excelCol = dbColToExcelCol.get(systemCol);
+      if (!excelCol) continue;
+
+      for (const item of items) {
+        if (!item.replacement) continue;
+        const selectedOption = item.validOptions.find((opt) => opt.code === item.replacement);
+        const replacementLabel = selectedOption?.label || item.replacement;
+
+        for (const rowIdx of item.rowIndices) {
+          if (newData[rowIdx]) {
+            newData[rowIdx][excelCol] = replacementLabel;
+          }
+        }
+      }
+    }
+
+    setAllData(newData);
+    setDisplayData(newData);
+    setShowCategoryValidation(false);
+    setCategoryMismatches({});
+    toast.success("카테고리 값이 대체되었습니다.");
+    setCurrentStep(3);
+    return true;
+  };
+
   // 다음/이전 단계
-  const handleNext = () => {
+  const handleNext = async () => {
     if (currentStep === 1) {
       if (!file) {
         toast.error("파일을 선택해주세요.");
@@ -328,6 +495,14 @@ export const MultiTableExcelUploadModal: React.FC<MultiTableExcelUploadModalProp
         toast.error(`필수 컬럼이 매핑되지 않았습니다: ${unmappedRequired.join(", ")}`);
         return;
       }
+
+      // 카테고리 컬럼 검증
+      const mismatches = await validateCategoryColumns();
+      if (mismatches) {
+        setCategoryMismatches(mismatches);
+        setShowCategoryValidation(true);
+        return;
+      }
     }
 
     setCurrentStep((prev) => Math.min(prev + 1, 3));
@@ -349,10 +524,14 @@ export const MultiTableExcelUploadModal: React.FC<MultiTableExcelUploadModalProp
       setDisplayData([]);
       setExcelColumns([]);
       setColumnMappings([]);
+      setShowCategoryValidation(false);
+      setCategoryMismatches({});
+      setIsCategoryValidating(false);
     }
   }, [open, config.uploadModes]);
 
   return (
+    <>
     <Dialog open={open} onOpenChange={onOpenChange}>
       <DialogContent
         className="max-h-[95vh] max-w-[95vw] sm:max-w-[1200px]"
@@ -758,10 +937,17 @@ export const MultiTableExcelUploadModal: React.FC<MultiTableExcelUploadModalProp
           {currentStep < 3 ? (
             <Button
               onClick={handleNext}
-              disabled={isUploading || (currentStep === 1 && !file)}
+              disabled={isUploading || isCategoryValidating || (currentStep === 1 && !file)}
               className="h-8 flex-1 text-xs sm:h-10 sm:flex-none sm:text-sm"
             >
-              다음
+              {isCategoryValidating ? (
+                <>
+                  <Loader2 className="mr-2 h-4 w-4 animate-spin" />
+                  검증 중...
+                </>
+              ) : (
+                "다음"
+              )}
             </Button>
           ) : (
             <Button
@@ -782,5 +968,112 @@ export const MultiTableExcelUploadModal: React.FC<MultiTableExcelUploadModalProp
         </DialogFooter>
       </DialogContent>
     </Dialog>
+
+    {/* 카테고리 대체값 선택 다이얼로그 */}
+    <Dialog open={showCategoryValidation} onOpenChange={(open) => {
+      if (!open) {
+        setShowCategoryValidation(false);
+        setCategoryMismatches({});
+      }
+    }}>
+      <DialogContent className="max-w-[95vw] sm:max-w-[600px]">
+        <DialogHeader>
+          <DialogTitle className="flex items-center gap-2 text-base sm:text-lg">
+            <AlertCircle className="h-5 w-5 text-warning" />
+            존재하지 않는 카테고리 값 감지
+          </DialogTitle>
+          <DialogDescription className="text-xs sm:text-sm">
+            엑셀 데이터에 등록되지 않은 카테고리 값이 있습니다. 각 항목에 대해 대체할 값을 선택해주세요.
+          </DialogDescription>
+        </DialogHeader>
+
+        <div className="max-h-[400px] space-y-4 overflow-y-auto pr-1">
+          {Object.entries(categoryMismatches).map(([key, items]) => {
+            const [, displayName] = key.split("|||");
+            return (
+              <div key={key} className="space-y-2">
+                <h4 className="text-sm font-semibold text-foreground">
+                  {displayName}
+                </h4>
+                {items.map((item, idx) => (
+                  <div
+                    key={`${key}-${idx}`}
+                    className="grid grid-cols-[1fr_auto_1fr] items-center gap-2 rounded-md border border-border bg-muted/30 p-2"
+                  >
+                    <div className="flex flex-col">
+                      <span className="text-xs font-medium text-destructive line-through">
+                        {item.invalidValue}
+                      </span>
+                      <span className="text-[10px] text-muted-foreground">
+                        {item.rowIndices.length}건
+                      </span>
+                    </div>
+                    <ArrowRight className="h-4 w-4 text-muted-foreground" />
+                    <Select
+                      value={item.replacement || ""}
+                      onValueChange={(val) => {
+                        setCategoryMismatches((prev) => {
+                          const updated = { ...prev };
+                          updated[key] = updated[key].map((it, i) =>
+                            i === idx ? { ...it, replacement: val } : it
+                          );
+                          return updated;
+                        });
+                      }}
+                    >
+                      <SelectTrigger className="h-8 text-xs sm:h-9 sm:text-sm">
+                        <SelectValue placeholder="대체 값 선택" />
+                      </SelectTrigger>
+                      <SelectContent>
+                        {item.validOptions.map((opt) => (
+                          <SelectItem
+                            key={opt.code}
+                            value={opt.code}
+                            className="text-xs sm:text-sm"
+                          >
+                            {opt.label}
+                          </SelectItem>
+                        ))}
+                      </SelectContent>
+                    </Select>
+                  </div>
+                ))}
+              </div>
+            );
+          })}
+        </div>
+
+        <DialogFooter className="gap-2 sm:gap-0">
+          <Button
+            variant="outline"
+            onClick={() => {
+              setShowCategoryValidation(false);
+              setCategoryMismatches({});
+            }}
+            className="h-8 flex-1 text-xs sm:h-10 sm:flex-none sm:text-sm"
+          >
+            취소
+          </Button>
+          <Button
+            variant="outline"
+            onClick={() => {
+              setShowCategoryValidation(false);
+              setCategoryMismatches({});
+              setCurrentStep(3);
+            }}
+            className="h-8 flex-1 text-xs sm:h-10 sm:flex-none sm:text-sm"
+          >
+            무시하고 진행
+          </Button>
+          <Button
+            onClick={applyCategoryReplacements}
+            className="h-8 flex-1 text-xs sm:h-10 sm:flex-none sm:text-sm"
+          >
+            적용
+          </Button>
+        </DialogFooter>
+      </DialogContent>
+    </Dialog>
+    </>
   );
 };