feat: implement bulk user group/tenant move functionality

adminfront/src/features/users/UserListPage.tsx

@@ -53,6 +53,7 @@ import {
 } from "../../lib/adminApi";
 import { t } from "../../lib/i18n";
 import { UserBulkUploadModal } from "./components/UserBulkUploadModal";
+import { UserBulkMoveGroupModal } from "./components/UserBulkMoveGroupModal";
 
 type UserSchemaField = {
   key: string;
@@ -552,6 +553,13 @@ function UserListPage() {
                 >
                   {t("ui.common.status.inactive", "비활성화")}
                 </Button>
+                <UserBulkMoveGroupModal 
+                  userIds={selectedUserIds} 
+                  onSuccess={() => {
+                    query.refetch();
+                    setSelectedUserIds([]);
+                  }} 
+                />
                 <div className="w-px h-4 bg-background/20 mx-1" />
                 <Button 
                   variant="ghost" 

adminfront/src/features/users/components/UserBulkMoveGroupModal.tsx

@@ -0,0 +1,180 @@
+import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
+import { FolderTree, Loader2, Search } from "lucide-react";
+import * as React from "react";
+import { toast } from "sonner";
+import { Button } from "../../../components/ui/button";
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogTitle,
+  DialogTrigger,
+} from "../../../components/ui/dialog";
+import { Input } from "../../../components/ui/input";
+import { ScrollArea } from "../../../components/ui/scroll-area";
+import { 
+  bulkUpdateUsers, 
+  fetchGroups, 
+  fetchTenants,
+  type TenantSummary,
+  type GroupSummary
+} from "../../../lib/adminApi";
+import { t } from "../../../lib/i18n";
+
+interface UserBulkMoveGroupModalProps {
+  userIds: string[];
+  onSuccess?: () => void;
+}
+
+export function UserBulkMoveGroupModal({ userIds, onSuccess }: UserBulkMoveGroupModalProps) {
+  const [open, setOpen] = React.useState(false);
+  const [selectedTenantSlug, setSelectedTenantSlug] = React.useState<string>("");
+  const [selectedGroupName, setSelectedGroupName] = React.useState<string>("");
+  const [searchTerm, setSearchTerm] = React.useState("");
+  
+  const queryClient = useQueryClient();
+
+  const { data: tenantsData } = useQuery({
+    queryKey: ["tenants", { limit: 100 }],
+    queryFn: () => fetchTenants(100, 0),
+    enabled: open,
+  });
+  const tenants = tenantsData?.items ?? [];
+
+  const selectedTenantId = React.useMemo(() => 
+    tenants.find(t => t.slug === selectedTenantSlug)?.id ?? "", 
+  [tenants, selectedTenantSlug]);
+
+  const { data: groups, isLoading: isGroupsLoading } = useQuery({
+    queryKey: ["tenant-groups", selectedTenantId],
+    queryFn: () => fetchGroups(selectedTenantId),
+    enabled: open && !!selectedTenantId,
+  });
+
+  const mutation = useMutation({
+    mutationFn: bulkUpdateUsers,
+    onSuccess: () => {
+      toast.success(t("msg.admin.users.bulk.move_success", "사용자들의 부서가 이동되었습니다."));
+      setOpen(false);
+      onSuccess?.();
+    },
+    onError: (error: any) => {
+      toast.error(t("msg.admin.users.bulk.move_error", "부서 이동 실패"), {
+        description: error.response?.data?.error || error.message,
+      });
+    },
+  });
+
+  const handleMove = () => {
+    if (!selectedTenantSlug) return;
+    mutation.mutate({
+      userIds,
+      companyCode: selectedTenantSlug,
+      department: selectedGroupName, // can be empty for "No Department"
+    });
+  };
+
+  const filteredGroups = React.useMemo(() => {
+    if (!groups) return [];
+    if (!searchTerm) return groups;
+    return groups.filter(g => g.name.toLowerCase().includes(searchTerm.toLowerCase()));
+  }, [groups, searchTerm]);
+
+  return (
+    <Dialog open={open} onOpenChange={setOpen}>
+      <DialogTrigger asChild>
+        <Button variant="ghost" size="sm" className="text-background hover:bg-background/10 h-8">
+          {t("ui.admin.users.bulk.move_group", "부서 이동")}
+        </Button>
+      </DialogTrigger>
+      <DialogContent className="max-w-md">
+        <DialogHeader>
+          <DialogTitle>{t("ui.admin.users.bulk.move_title", "사용자 부서 이동")}</DialogTitle>
+          <DialogDescription>
+            {t("msg.admin.users.bulk.move_description", "선택한 {{count}}명의 사용자를 이동할 테넌트와 부서를 선택하세요.", { count: userIds.length })}
+          </DialogDescription>
+        </DialogHeader>
+
+        <div className="space-y-4 py-4">
+          <div className="space-y-2">
+            <label className="text-sm font-medium">{t("ui.admin.users.create.form.tenant", "테넌트 선택")}</label>
+            <select
+              className="flex h-9 w-full rounded-md border border-input bg-transparent px-3 py-1 text-sm shadow-sm transition-colors focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring"
+              value={selectedTenantSlug}
+              onChange={(e) => {
+                setSelectedTenantSlug(e.target.value);
+                setSelectedGroupName("");
+              }}
+            >
+              <option value="">{t("ui.common.select", "선택하세요...")}</option>
+              {tenants.map((t) => (
+                <option key={t.id} value={t.slug}>{t.name} ({t.slug})</option>
+              ))}
+            </select>
+          </div>
+
+          {selectedTenantSlug && (
+            <div className="space-y-2">
+              <label className="text-sm font-medium">{t("ui.admin.users.bulk.select_group", "부서 선택")}</label>
+              <div className="relative">
+                <Search className="absolute left-2.5 top-2.5 h-4 w-4 text-muted-foreground" />
+                <Input
+                  placeholder={t("ui.common.search", "검색...")}
+                  className="pl-9 h-9"
+                  value={searchTerm}
+                  onChange={(e) => setSearchTerm(e.target.value)}
+                />
+              </div>
+              <ScrollArea className="h-[200px] rounded-md border p-2">
+                <div className="space-y-1">
+                  <button
+                    type="button"
+                    onClick={() => setSelectedGroupName("")}
+                    className={`flex w-full items-center gap-2 rounded-lg px-3 py-2 text-sm transition ${
+                      selectedGroupName === "" ? "bg-primary text-primary-foreground" : "hover:bg-muted"
+                    }`}
+                  >
+                    <FolderTree size={14} />
+                    {t("ui.admin.users.bulk.no_department", "(부서 없음)")}
+                  </button>
+                  {isGroupsLoading ? (
+                    <div className="flex justify-center py-4"><Loader2 className="animate-spin text-muted-foreground" /></div>
+                  ) : (
+                    filteredGroups.map((group) => (
+                      <button
+                        key={group.id}
+                        type="button"
+                        onClick={() => setSelectedGroupName(group.name)}
+                        className={`flex w-full items-center gap-2 rounded-lg px-3 py-2 text-sm transition ${
+                          selectedGroupName === group.name ? "bg-primary text-primary-foreground" : "hover:bg-muted"
+                        }`}
+                      >
+                        <FolderTree size={14} />
+                        {group.name}
+                      </button>
+                    ))
+                  )}
+                </div>
+              </ScrollArea>
+            </div>
+          )}
+        </div>
+
+        <DialogFooter>
+          <Button variant="outline" onClick={() => setOpen(false)}>
+            {t("ui.common.cancel", "취소")}
+          </Button>
+          <Button 
+            onClick={handleMove} 
+            disabled={!selectedTenantSlug || mutation.isPending}
+          >
+            {mutation.isPending && <Loader2 size={16} className="mr-2 animate-spin" />}
+            {t("ui.admin.users.bulk.do_move", "이동 실행")}
+          </Button>
+        </DialogFooter>
+      </DialogContent>
+    </Dialog>
+  );
+}

backend/internal/handler/user_handler.go

@@ -673,9 +673,11 @@ func (h *UserHandler) ExportUsersCSV(c *fiber.Ctx) error {
 
 func (h *UserHandler) BulkUpdateUsers(c *fiber.Ctx) error {
 	var req struct {
-		UserIDs []string `json:"userIds"`
-		Status  *string  `json:"status"`
-		Role    *string  `json:"role"`
+		UserIDs     []string `json:"userIds"`
+		Status      *string  `json:"status"`
+		Role        *string  `json:"role"`
+		CompanyCode *string  `json:"companyCode"`
+		Department  *string  `json:"department"`
 	}
 	if err := c.BodyParser(&req); err != nil {
 		return errorJSON(c, fiber.StatusBadRequest, "invalid request body")
@@ -690,7 +692,13 @@ func (h *UserHandler) BulkUpdateUsers(c *fiber.Ctx) error {
 		return errorJSON(c, fiber.StatusUnauthorized, "unauthorized")
 	}
 
-	// Build manageable slugs map if tenant_admin
+	// [New] Pre-fetch tenant cache if companyCode is being changed
+	type tenantCacheItem struct {
+		ID     string
+		Schema []interface{}
+	}
+	tenantCache := make(map[string]tenantCacheItem)
+
 	manageableSlugs := make(map[string]bool)
 	if requester.Role == domain.RoleTenantAdmin {
 		for _, t := range requester.ManageableTenants {
@@ -711,12 +719,19 @@ func (h *UserHandler) BulkUpdateUsers(c *fiber.Ctx) error {
 		}
 
 		// Authorization check
+		userComp := strings.ToLower(extractTraitString(identity.Traits, "companyCode"))
 		if requester.Role == domain.RoleTenantAdmin {
-			userComp := strings.ToLower(extractTraitString(identity.Traits, "companyCode"))
 			if !manageableSlugs[userComp] {
 				results = append(results, map[string]any{"id": id, "success": false, "message": "forbidden: user belongs to another tenant"})
 				continue
 			}
+			// If changing companyCode, must be to a manageable one
+			if req.CompanyCode != nil {
+				if !manageableSlugs[strings.ToLower(*req.CompanyCode)] {
+					results = append(results, map[string]any{"id": id, "success": false, "message": "forbidden: target tenant not manageable"})
+					continue
+				}
+			}
 		}
 
 		// Prepare updates
@@ -724,6 +739,24 @@ func (h *UserHandler) BulkUpdateUsers(c *fiber.Ctx) error {
 		if req.Role != nil {
 			traits["role"] = *req.Role
 		}
+		if req.CompanyCode != nil {
+			traits["companyCode"] = *req.CompanyCode
+			
+			// Resolve and update tenant_id in traits if changed
+			if tItem, exists := tenantCache[*req.CompanyCode]; exists {
+				traits["tenant_id"] = tItem.ID
+			} else if h.TenantService != nil {
+				tenant, err := h.TenantService.GetTenantBySlug(c.Context(), *req.CompanyCode)
+				if err == nil && tenant != nil {
+					tItem.ID = tenant.ID
+					tenantCache[*req.CompanyCode] = tItem
+					traits["tenant_id"] = tenant.ID
+				}
+			}
+		}
+		if req.Department != nil {
+			traits["department"] = *req.Department
+		}
 
 		state := identity.State
 		if req.Status != nil {
@@ -743,12 +776,10 @@ func (h *UserHandler) BulkUpdateUsers(c *fiber.Ctx) error {
 		// Sync to local DB
 		if h.UserRepo != nil {
 			localUser := h.mapToLocalUser(*identity)
-			if req.Role != nil {
-				localUser.Role = *req.Role
-			}
-			if req.Status != nil {
-				localUser.Status = *req.Status
-			}
+			if req.Role != nil { localUser.Role = *req.Role }
+			if req.Status != nil { localUser.Status = *req.Status }
+			if req.CompanyCode != nil { localUser.CompanyCode = *req.CompanyCode }
+			if req.Department != nil { localUser.Department = *req.Department }
 			_ = h.UserRepo.Update(c.Context(), localUser)
 		}