feat(admin): improve tenant bulk import reporting with detailed results

- Backend: Enhanced 'ImportTenantsCSV' to return row-by-row details including action, status, and modified fields.
- Backend: Refactored 'upsertTenantCSVRecord' to detect and return specific modified fields (Name, Type, ParentID, Slug, Description, Config, Domains).
- Frontend: Added 'TenantImportDetail' and updated 'TenantImportResult' types.
- Frontend: Implemented a detailed results modal in 'TenantListPage' showing processing summary and row-level feedback for better transparency.

adminfront/src/features/tenants/routes/TenantListPage.tsx

@@ -285,6 +285,9 @@ function TenantListPage() {
     Record<number, string>
   >({});
   const [previewOpen, setPreviewOpen] = React.useState(false);
+  const [importResult, setImportResult] =
+    React.useState<TenantImportResult | null>(null);
+  const [importResultOpen, setImportResultOpen] = React.useState(false);
   const [selectedBulkStatus, setSelectedBulkStatus] = React.useState("");
   const _tenantTableScrollRef = React.useRef<HTMLDivElement | null>(null);
 
@@ -387,17 +390,8 @@ function TenantListPage() {
   const importMutation = useMutation({
     mutationFn: (file: File) => importTenantsCSV(file),
     onSuccess: (result) => {
-      setImportMessage(
-        t(
-          "msg.admin.tenants.import_result",
-          "생성 {{created}}, 갱신 {{updated}}, 실패 {{failed}}",
-          {
-            created: result.created,
-            updated: result.updated,
-            failed: result.failed,
-          },
-        ),
-      );
+      setImportResult(result);
+      setImportResultOpen(true);
       setPreviewOpen(false);
       setPreviewRows([]);
       setSelectedMatches({});
@@ -1006,6 +1000,128 @@ function TenantListPage() {
         </div>
       )}
 
+      <Dialog open={importResultOpen} onOpenChange={setImportResultOpen}>
+        <DialogContent className="max-w-5xl">
+          <DialogHeader>
+            <DialogTitle>
+              {t(
+                "ui.admin.tenants.import_result.title",
+                "가져오기 결과 리포트",
+              )}
+            </DialogTitle>
+            <DialogDescription>
+              {importResult &&
+                t(
+                  "msg.admin.tenants.import_result.summary",
+                  "총 {{total}}건 처리: 생성 {{created}}, 갱신 {{updated}}, 실패 {{failed}}",
+                  {
+                    total: importResult.details.length,
+                    created: importResult.created,
+                    updated: importResult.updated,
+                    failed: importResult.failed,
+                  },
+                )}
+            </DialogDescription>
+          </DialogHeader>
+
+          <div className="max-h-[60vh] overflow-auto rounded-md border">
+            <Table>
+              <TableHeader className={commonStickyTableHeaderClass}>
+                <TableRow>
+                  <TableHead className="w-[72px]">
+                    {t("ui.common.row", "행")}
+                  </TableHead>
+                  <TableHead>
+                    {t("ui.admin.tenants.table.name", "NAME")}
+                  </TableHead>
+                  <TableHead>
+                    {t("ui.admin.tenants.table.slug", "SLUG")}
+                  </TableHead>
+                  <TableHead>
+                    {t("ui.admin.tenants.import_result.action", "작업")}
+                  </TableHead>
+                  <TableHead>
+                    {t("ui.admin.tenants.import_result.status", "상태")}
+                  </TableHead>
+                  <TableHead>
+                    {t("ui.admin.tenants.import_result.message", "상세 내용")}
+                  </TableHead>
+                </TableRow>
+              </TableHeader>
+              <TableBody>
+                {importResult?.details.map((detail) => (
+                  <TableRow key={detail.row}>
+                    <TableCell className="font-mono text-xs">
+                      {detail.row}
+                    </TableCell>
+                    <TableCell className="font-medium">{detail.name}</TableCell>
+                    <TableCell className="font-mono text-xs">
+                      {detail.slug}
+                    </TableCell>
+                    <TableCell>
+                      <Badge
+                        variant={
+                          detail.action === "created"
+                            ? "success"
+                            : detail.action === "updated"
+                              ? "warning"
+                              : detail.action === "skipped"
+                                ? "outline"
+                                : "destructive"
+                        }
+                        className="text-[10px]"
+                      >
+                        {detail.action.toUpperCase()}
+                      </Badge>
+                    </TableCell>
+                    <TableCell>
+                      {detail.success ? (
+                        <Badge variant="success" className="text-[10px]">
+                          SUCCESS
+                        </Badge>
+                      ) : (
+                        <Badge variant="destructive" className="text-[10px]">
+                          FAILED
+                        </Badge>
+                      )}
+                    </TableCell>
+                    <TableCell className="text-xs">
+                      {detail.message}
+                      {detail.modifiedFields &&
+                        detail.modifiedFields.length > 0 && (
+                          <div className="mt-1 flex flex-wrap gap-1">
+                            <span className="mr-1 text-muted-foreground">
+                              {t(
+                                "ui.admin.tenants.import_result.modified",
+                                "수정됨:",
+                              )}
+                            </span>
+                            {detail.modifiedFields.map((field) => (
+                              <Badge
+                                key={field}
+                                variant="outline"
+                                className="bg-muted text-[10px]"
+                              >
+                                {field}
+                              </Badge>
+                            ))}
+                          </div>
+                        )}
+                    </TableCell>
+                  </TableRow>
+                ))}
+              </TableBody>
+            </Table>
+          </div>
+
+          <DialogFooter>
+            <Button onClick={() => setImportResultOpen(false)}>
+              {t("ui.common.confirm", "확인")}
+            </Button>
+          </DialogFooter>
+        </DialogContent>
+      </Dialog>
+
       <Dialog open={previewOpen} onOpenChange={setPreviewOpen}>
         <DialogContent className="max-w-5xl">
           <DialogHeader>

adminfront/src/lib/adminApi.ts

@@ -70,11 +70,22 @@ export type TenantUpdateRequest = {
   config?: Record<string, unknown>;
 };
 
+export type TenantImportDetail = {
+  row: number;
+  slug: string;
+  name: string;
+  success: boolean;
+  action: "created" | "updated" | "failed" | "skipped";
+  message: string;
+  modifiedFields?: string[];
+};
+
 export type TenantImportResult = {
   created: number;
   updated: number;
   failed: number;
   errors: string[];
+  details: TenantImportDetail[];
 };
 
 export type ApiKeySummary = {

backend/internal/handler/tenant_handler.go

@@ -102,11 +102,22 @@ func pageTenantsByCursor(tenants []domain.Tenant, limit int, cursorRaw string) (
 	})
 }
 
+type tenantImportDetail struct {
+	Row            int      `json:"row"`
+	Slug           string   `json:"slug"`
+	Name           string   `json:"name"`
+	Success        bool     `json:"success"`
+	Action         string   `json:"action"`         // "created", "updated", "failed", "skipped"
+	Message        string   `json:"message"`        // Detailed error or success message
+	ModifiedFields []string `json:"modifiedFields"` // List of fields changed during update
+}
+
 type tenantImportResult struct {
-	Created int      `json:"created"`
-	Updated int      `json:"updated"`
-	Failed  int      `json:"failed"`
-	Errors  []string `json:"errors"`
+	Created int                  `json:"created"`
+	Updated int                  `json:"updated"`
+	Failed  int                  `json:"failed"`
+	Errors  []string             `json:"errors"`
+	Details []tenantImportDetail `json:"details"`
 }
 
 type tenantDomainConflict struct {
@@ -557,32 +568,64 @@ func (h *TenantHandler) ImportTenantsCSV(c *fiber.Ctx) error {
 		}
 	}
 
-	result := tenantImportResult{Errors: make([]string, 0)}
+	result := tenantImportResult{
+		Errors:  make([]string, 0),
+		Details: make([]tenantImportDetail, 0, len(records)),
+	}
 	for i, record := range records {
 		rowNumber := i + 2
+		detail := tenantImportDetail{
+			Row:  rowNumber,
+			Slug: record.Slug,
+			Name: record.Name,
+		}
+
 		if record.ParentTenantID == nil && record.ParentTenantSlug != "" {
 			parentID := tenantIDBySlug[strings.ToLower(record.ParentTenantSlug)]
 			if parentID == "" {
 				result.Failed++
-				result.Errors = append(result.Errors, fmt.Sprintf("row %d: parent tenant slug not found: %s", rowNumber, record.ParentTenantSlug))
+				msg := fmt.Sprintf("row %d: parent tenant slug not found: %s", rowNumber, record.ParentTenantSlug)
+				result.Errors = append(result.Errors, msg)
+				detail.Success = false
+				detail.Action = "failed"
+				detail.Message = msg
+				result.Details = append(result.Details, detail)
 				continue
 			}
 			record.ParentTenantID = &parentID
 		}
 		if record.TenantID != "" || (h.DB != nil && record.Slug != "") {
-			tenant, updated, err := h.upsertTenantCSVRecord(c, record)
+			tenant, modifiedFields, err := h.upsertTenantCSVRecord(c, record)
 			if err != nil {
 				result.Failed++
-				result.Errors = append(result.Errors, fmt.Sprintf("row %d: %s", rowNumber, err.Error()))
+				msg := fmt.Sprintf("row %d: %s", rowNumber, err.Error())
+				result.Errors = append(result.Errors, msg)
+				detail.Success = false
+				detail.Action = "failed"
+				detail.Message = msg
+				result.Details = append(result.Details, detail)
 				continue
 			}
-			if updated {
-				tenantIDBySlug[strings.ToLower(record.Slug)] = tenant.ID
-				result.Updated++
-				if h.Worksmobile != nil {
-					_ = h.Worksmobile.EnqueueTenantUpsertIfInScope(c.Context(), *tenant)
+			if tenant != nil {
+				if len(modifiedFields) > 0 {
+					tenantIDBySlug[strings.ToLower(record.Slug)] = tenant.ID
+					result.Updated++
+					detail.Success = true
+					detail.Action = "updated"
+					detail.ModifiedFields = modifiedFields
+					if h.Worksmobile != nil {
+						_ = h.Worksmobile.EnqueueTenantUpsertIfInScope(c.Context(), *tenant)
+					}
+					result.Details = append(result.Details, detail)
+					continue
+				} else {
+					// No changes, skip
+					detail.Success = true
+					detail.Action = "skipped"
+					detail.Message = "no changes detected"
+					result.Details = append(result.Details, detail)
+					continue
 				}
-				continue
 			}
 		}
 
@@ -594,19 +637,32 @@ func (h *TenantHandler) ImportTenantsCSV(c *fiber.Ctx) error {
 		tenant, err := h.createTenantCSVRecord(c, record, recordCreatorID)
 		if err != nil {
 			result.Failed++
-			result.Errors = append(result.Errors, fmt.Sprintf("row %d: %s", rowNumber, err.Error()))
+			msg := fmt.Sprintf("row %d: %s", rowNumber, err.Error())
+			result.Errors = append(result.Errors, msg)
+			detail.Success = false
+			detail.Action = "failed"
+			detail.Message = msg
+			result.Details = append(result.Details, detail)
 			continue
 		}
 		if tenant == nil {
 			result.Failed++
-			result.Errors = append(result.Errors, fmt.Sprintf("row %d: tenant creation returned empty result", rowNumber))
+			msg := fmt.Sprintf("row %d: tenant creation returned empty result", rowNumber)
+			result.Errors = append(result.Errors, msg)
+			detail.Success = false
+			detail.Action = "failed"
+			detail.Message = msg
+			result.Details = append(result.Details, detail)
 			continue
 		}
 		tenantIDBySlug[strings.ToLower(record.Slug)] = tenant.ID
 		result.Created++
+		detail.Success = true
+		detail.Action = "created"
 		if h.Worksmobile != nil {
 			_ = h.Worksmobile.EnqueueTenantUpsertIfInScope(c.Context(), *tenant)
 		}
+		result.Details = append(result.Details, detail)
 	}
 
 	return c.JSON(result)
@@ -1385,12 +1441,12 @@ func (h *TenantHandler) replaceTenantDomains(ctx context.Context, tenantID strin
 	return nil
 }
 
-func (h *TenantHandler) upsertTenantCSVRecord(c *fiber.Ctx, record tenantCSVRecord) (*domain.Tenant, bool, error) {
+func (h *TenantHandler) upsertTenantCSVRecord(c *fiber.Ctx, record tenantCSVRecord) (*domain.Tenant, []string, error) {
 	if h.DB == nil {
 		if record.TenantID != "" {
-			return nil, false, errors.New("database not available for tenant update")
+			return nil, nil, errors.New("database not available for tenant update")
 		}
-		return nil, false, nil
+		return nil, nil, nil
 	}
 
 	var tenant domain.Tenant
@@ -1403,42 +1459,85 @@ func (h *TenantHandler) upsertTenantCSVRecord(c *fiber.Ctx, record tenantCSVReco
 	}
 
 	if errors.Is(err, gorm.ErrRecordNotFound) {
-		return nil, false, nil
+		return nil, nil, nil
 	}
 	if err != nil {
-		return nil, false, err
+		return nil, nil, err
+	}
+
+	modifiedFields := []string{}
+	if tenant.Name != record.Name {
+		tenant.Name = record.Name
+		modifiedFields = append(modifiedFields, "Name")
+	}
+	if tenant.Type != record.Type {
+		tenant.Type = record.Type
+		modifiedFields = append(modifiedFields, "Type")
+	}
+	if record.ParentTenantID != nil {
+		oldParentID := ""
+		if tenant.ParentID != nil {
+			oldParentID = *tenant.ParentID
+		}
+		if oldParentID != *record.ParentTenantID {
+			tenant.ParentID = record.ParentTenantID
+			modifiedFields = append(modifiedFields, "ParentID")
+		}
+	} else if tenant.ParentID != nil {
+		tenant.ParentID = nil
+		modifiedFields = append(modifiedFields, "ParentID")
+	}
+
+	if tenant.Slug != record.Slug {
+		tenant.Slug = record.Slug
+		modifiedFields = append(modifiedFields, "Slug")
+	}
+	if tenant.Description != record.Memo {
+		tenant.Description = record.Memo
+		modifiedFields = append(modifiedFields, "Description")
 	}
 
-	tenant.Name = record.Name
-	tenant.Type = record.Type
-	tenant.ParentID = record.ParentTenantID
-	tenant.Slug = record.Slug
-	tenant.Description = record.Memo
 	if tenant.Status == "" {
 		tenant.Status = domain.TenantStatusActive
 	}
 	mergedConfig, changedConfig, err := mergeTenantCSVRecordConfig(tenant.Config, record)
 	if err != nil {
-		return nil, false, err
+		return nil, nil, err
 	}
 	if changedConfig {
 		tenant.Config = mergedConfig
+		modifiedFields = append(modifiedFields, "Config")
+	}
+
+	existingDomains := make([]string, len(tenant.Domains))
+	for i, d := range tenant.Domains {
+		existingDomains[i] = d.Domain
+	}
+	sort.Strings(existingDomains)
+	newDomains := append([]string(nil), record.Domains...)
+	sort.Strings(newDomains)
+	if !reflect.DeepEqual(existingDomains, newDomains) {
+		modifiedFields = append(modifiedFields, "Domains")
+	}
+
+	if len(modifiedFields) == 0 {
+		return &tenant, nil, nil
 	}
 
 	if err := h.DB.Save(&tenant).Error; err != nil {
-		return nil, false, err
+		return nil, nil, err
 	}
 	if err := h.DB.Delete(&domain.TenantDomain{}, "tenant_id = ?", tenant.ID).Error; err != nil {
-		return nil, false, err
+		return nil, nil, err
 	}
 	repo := repository.NewTenantRepository(h.DB)
 	for _, domainName := range record.Domains {
 		if err := repo.AddDomain(c.Context(), tenant.ID, domainName, true); err != nil {
-			return nil, false, err
+			return nil, nil, err
 		}
 	}
 
-	return &tenant, true, nil
+	return &tenant, modifiedFields, nil
 }
 
 func (h *TenantHandler) createTenantCSVRecord(c *fiber.Ctx, record tenantCSVRecord, creatorID string) (*domain.Tenant, error) {