feat(admin): normalize combo and holiday policies

TaxBaik.Web/Components/Admin/Pages/Clients/ClientDetail.razor

@@ -2,6 +2,7 @@
 @attribute [Authorize]
 @using TaxBaik.Web.Services
 @using TaxBaik.Web.Services.AdminClients
+@using TaxBaik.Web.Components.Admin.Shared
 @inject IClientBrowserClient ClientClient
 @inject IConsultingActivityBrowserClient ConsultingClient
 @inject NavigationManager Navigation
@@ -103,12 +104,7 @@
                             <MudDatePicker @bind-Date="newDate" Label="상담일" DateFormat="yyyy-MM-dd" />
                         </MudItem>
                         <MudItem xs="12" sm="6">
-                        <MudSelect T="string" @bind-Value="newServiceType" Label="서비스 분야">
-                                @foreach (var t in serviceTypes)
-                                {
-                                    <MudSelectItem Value="@t">@t</MudSelectItem>
-                                }
-                            </MudSelect>
+                        <CommonCodeSelect @bind-Value="newServiceType" Group="CONSULTING_ACTIVITY_TYPE" Label="서비스 분야" Placeholder="선택" Clearable="true" />
                         </MudItem>
                         <MudItem xs="12">
                             <MudTextField T="string" @bind-Value="newSummary" Label="상담 내용 *"
@@ -183,7 +179,6 @@
 
     private Domain.Entities.Client? client;
     private List<Domain.Entities.Consultation> consultations = [];
-    private static readonly string[] serviceTypes = ["기장대리", "세무조정", "양도세", "증여세", "상속세", "부가세", "종소세", "기타"];
     private static readonly string[] results = ["", "상담완료", "추가자료 요청", "견적발송", "계약전환", "보류"];
 
     private bool showAddForm;