diff --git a/src/TaxBaik.Application/Seasonal/BusinessDayCalculator.cs b/src/TaxBaik.Application/Seasonal/BusinessDayCalculator.cs
index b5b47d3..f48fdf6 100644
--- a/src/TaxBaik.Application/Seasonal/BusinessDayCalculator.cs
+++ b/src/TaxBaik.Application/Seasonal/BusinessDayCalculator.cs
@@ -68,6 +68,14 @@ public static class BusinessDayCalculator
         return effectiveDate.DayNumber - referenceDate.DayNumber;
     }
 
+    public static DateOnly GetEffectiveDueDate(DateOnly date) => GetEffectiveBusinessDate(date);
+
+    public static int GetDday(DateOnly dueDate)
+    {
+        var today = DateOnly.FromDateTime(DateTime.Now);
+        return dueDate.DayNumber - today.DayNumber;
+    }
+
     private static bool IsBusinessDay(DateOnly date)
         => date.DayOfWeek is not DayOfWeek.Saturday and not DayOfWeek.Sunday
            && !HolidayDates.Contains(date);
diff --git a/src/TaxBaik.Web/Components/Admin/ConfirmDialog.razor b/src/TaxBaik.Web/Components/Admin/ConfirmDialog.razor
deleted file mode 100644
index 876557d..0000000
--- a/src/TaxBaik.Web/Components/Admin/ConfirmDialog.razor
+++ /dev/null
@@ -1,18 +0,0 @@
-@using MudBlazor
-
-<MudDialog>
-    <DialogContent>
-        <MudText>정말로 삭제하시겠습니까?</MudText>
-    </DialogContent>
-    <DialogActions>
-        <MudButton OnClick="@Cancel">취소</MudButton>
-        <MudButton Color="Color.Error" OnClick="@Confirm">삭제</MudButton>
-    </DialogActions>
-</MudDialog>
-
-@code {
-    [CascadingParameter] MudDialogInstance? MudDialog { get; set; }
-
-    void Cancel() => MudDialog?.Cancel();
-    void Confirm() => MudDialog?.Close(DialogResult.Ok(true));
-}
diff --git a/src/TaxBaik.Web/Components/Admin/Forms/CompanyForm.razor b/src/TaxBaik.Web/Components/Admin/Forms/CompanyForm.razor
index 54d653d..45b962d 100644
--- a/src/TaxBaik.Web/Components/Admin/Forms/CompanyForm.razor
+++ b/src/TaxBaik.Web/Components/Admin/Forms/CompanyForm.razor
@@ -1,23 +1,23 @@
 @using TaxBaik.Application.Services
 
 <MudForm @ref="form">
-    <MudTextField @bind-Value="model.CompanyCode" Label="회사 코드"
+    <MudTextField @bind-value="model.CompanyCode" Label="회사 코드"
         Variant="Variant.Outlined" Class="mb-4" Required="true"
         HelperText="영문/숫자, 최대 50자" />
 
-    <MudTextField @bind-Value="model.CompanyName" Label="회사명"
+    <MudTextField @bind-value="model.CompanyName" Label="회사명"
         Variant="Variant.Outlined" Class="mb-4" Required="true" />
 
-    <MudTextField @bind-Value="model.ContactPerson" Label="담당자명"
+    <MudTextField @bind-value="model.ContactPerson" Label="담당자명"
         Variant="Variant.Outlined" Class="mb-4" />
 
-    <MudTextField @bind-Value="model.Phone" Label="전화번호"
+    <MudTextField @bind-value="model.Phone" Label="전화번호"
         Variant="Variant.Outlined" Class="mb-4" />
 
-    <MudTextField @bind-Value="model.Email" Label="이메일"
+    <MudTextField @bind-value="model.Email" Label="이메일"
         Variant="Variant.Outlined" Class="mb-4" InputType="InputType.Email" />
 
-    <MudTextField @bind-Value="model.Memo" Label="메모"
+    <MudTextField @bind-value="model.Memo" Label="메모"
         Variant="Variant.Outlined" Lines="3" Class="mb-4" />
 
     <MudCheckBox @bind-Checked="model.IsActive" Label="활성" Class="mb-4" />
diff --git a/src/TaxBaik.Web/Components/Admin/Forms/InquiryForm.razor b/src/TaxBaik.Web/Components/Admin/Forms/InquiryForm.razor
index 593c4c3..0c51395 100644
--- a/src/TaxBaik.Web/Components/Admin/Forms/InquiryForm.razor
+++ b/src/TaxBaik.Web/Components/Admin/Forms/InquiryForm.razor
@@ -4,25 +4,25 @@
 
 <MudForm @ref="form">
     <AdminFormSection Title="연락처" Description="고객 식별과 기본 회신 정보입니다." CssClass="mb-4">
-        <MudTextField @bind-Value="model.Name" Label="이름"
+        <MudTextField @bind-value="model.Name" Label="이름"
             Variant="Variant.Outlined" Class="mb-4" Required="true" ReadOnly="@IsEditMode" />
 
-        <MudTextField @bind-Value="model.Phone" Label="전화번호 (예: 010-1234-5678)"
+        <MudTextField @bind-value="model.Phone" Label="전화번호 (예: 010-1234-5678)"
             Variant="Variant.Outlined" Class="mb-4" Required="true" ReadOnly="@IsEditMode" />
 
-        <MudTextField @bind-Value="model.Email" Label="이메일"
+        <MudTextField @bind-value="model.Email" Label="이메일"
             Variant="Variant.Outlined" Class="mb-4" InputType="InputType.Email" ReadOnly="@IsEditMode" />
     </AdminFormSection>
 
     <AdminFormSection Title="문의 내용" Description="@(IsEditMode ? "상태와 메모만 변경 가능합니다." : "운영 분류와 처리 메모를 함께 관리합니다.")" CssClass="mb-4">
-        <CommonCodeSelect @bind-Value="model.ServiceType" Group="INQUIRY_SERVICE_TYPE" Label="문의 유형 *" Class="mb-4" Required="true" Disabled="@IsEditMode" Placeholder="문의 유형을 선택하세요" />
+        <CommonCodeSelect @bind-value="model.ServiceType" Group="INQUIRY_SERVICE_TYPE" Label="문의 유형 *" Class="mb-4" Required="true" Disabled="@IsEditMode" Placeholder="문의 유형을 선택하세요" />
 
-        <MudTextField @bind-Value="model.Message" Label="문의 내용"
+        <MudTextField @bind-value="model.Message" Label="문의 내용"
             Variant="Variant.Outlined" Lines="5" Class="mb-4" Required="true" ReadOnly="@IsEditMode" />
 
-        <CommonCodeSelect @bind-Value="model.Status" Group="INQUIRY_STATUS" Label="상태" Class="mb-4" Clearable="true" Placeholder="상태를 선택하세요" />
+        <CommonCodeSelect @bind-value="model.Status" Group="INQUIRY_STATUS" Label="상태" Class="mb-4" Clearable="true" Placeholder="상태를 선택하세요" />
 
-        <MudTextField @bind-Value="model.AdminMemo" Label="관리 메모"
+        <MudTextField @bind-value="model.AdminMemo" Label="관리 메모"
             Variant="Variant.Outlined" Lines="3" Class="mb-4" />
     </AdminFormSection>
 
diff --git a/src/TaxBaik.Web/Components/Admin/Pages/Announcements/AnnouncementEdit.razor b/src/TaxBaik.Web/Components/Admin/Pages/Announcements/AnnouncementEdit.razor
index 4b03b2e..c257e17 100644
--- a/src/TaxBaik.Web/Components/Admin/Pages/Announcements/AnnouncementEdit.razor
+++ b/src/TaxBaik.Web/Components/Admin/Pages/Announcements/AnnouncementEdit.razor
@@ -22,7 +22,7 @@
     <MudForm @ref="form">
         <MudGrid>
             <MudItem xs="12">
-                <MudTextField @bind-Value="model.Title"
+                <MudTextField @bind-value="model.Title"
                               Label="제목"
                               Variant="Variant.Outlined"
                               Required="true"
@@ -31,7 +31,7 @@
             </MudItem>
 
             <MudItem xs="12">
-                <MudTextField @bind-Value="model.Content"
+                <MudTextField @bind-value="model.Content"
                               Label="상세 내용 (선택)"
                               Variant="Variant.Outlined"
                               Lines="3"
@@ -39,14 +39,14 @@
             </MudItem>
 
             <MudItem xs="12" sm="6">
-                <CommonCodeSelect @bind-Value="model.DisplayType"
+                <CommonCodeSelect @bind-value="model.DisplayType"
                                   Group="ANNOUNCEMENT_DISPLAY_TYPE"
                                   Label="유형"
                                   Class="mb-0" />
             </MudItem>
 
             <MudItem xs="12" sm="6">
-                <MudNumericField @bind-Value="model.SortOrder"
+                <MudNumericField @bind-value="model.SortOrder"
                                  Label="노출 순서"
                                  Variant="Variant.Outlined"
                                  HelperText="숫자가 클수록 먼저 표시됩니다." />
diff --git a/src/TaxBaik.Web/Components/Admin/Pages/Announcements/AnnouncementList.razor b/src/TaxBaik.Web/Components/Admin/Pages/Announcements/AnnouncementList.razor
index b68a24d..fbc2a32 100644
--- a/src/TaxBaik.Web/Components/Admin/Pages/Announcements/AnnouncementList.razor
+++ b/src/TaxBaik.Web/Components/Admin/Pages/Announcements/AnnouncementList.razor
@@ -24,7 +24,7 @@
 </section>
 
 <div class="d-flex pa-4 gap-4 align-center">
-    <MudTextField @bind-Value="searchQuery" Placeholder="공지사항 제목 검색..." Adornment="Adornment.Start" 
+    <MudTextField @bind-value="searchQuery" Placeholder="공지사항 제목 검색..." Adornment="Adornment.Start" 
                   AdornmentIcon="@Icons.Material.Filled.Search" IconSize="Size.Medium" Class="flex-grow-1" Immediate="true" Clearable="true" />
 </div>
 
diff --git a/src/TaxBaik.Web/Components/Admin/Pages/Blog/BlogForm.razor b/src/TaxBaik.Web/Components/Admin/Pages/Blog/BlogForm.razor
index 920cfd2..339c303 100644
--- a/src/TaxBaik.Web/Components/Admin/Pages/Blog/BlogForm.razor
+++ b/src/TaxBaik.Web/Components/Admin/Pages/Blog/BlogForm.razor
@@ -3,10 +3,10 @@
 
 <MudForm @ref="form">
     <AdminFormSection Title="기본 정보" Description="제목과 카테고리, 발행 여부를 먼저 설정합니다." CssClass="mb-4">
-        <MudTextField @bind-Value="Model.Title" Label="제목 *"
+        <MudTextField @bind-value="Model.Title" Label="제목 *"
             Variant="Variant.Outlined" Class="mb-4" Required="true" RequiredError="제목을 입력하세요." Counter="100" MaxLength="100" />
 
-        <MudSelect T="int?" @bind-Value="Model.CategoryId" Label="카테고리 (선택 사항)"
+        <MudSelect T="int?" @bind-value="Model.CategoryId" Label="카테고리 (선택 사항)"
             Variant="Variant.Outlined" Class="mb-4" Clearable="true">
             <MudSelectItem Value="@((int?)null)">분류 없음</MudSelectItem>
             @foreach (var category in Categories)
@@ -19,17 +19,17 @@
     </AdminFormSection>
 
     <AdminFormSection Title="본문" Description="SEO와 실제 노출 본문을 함께 관리합니다." CssClass="mb-4">
-        <MudTextField @bind-Value="Model.Content" Label="본문 내용 *"
+        <MudTextField @bind-value="Model.Content" Label="본문 내용 *"
             Variant="Variant.Outlined" Lines="16" Required="true" RequiredError="본문 내용을 입력하세요."
             Class="mb-4" />
 
-        <MudTextField @bind-Value="Model.Tags" Label="태그 (쉼표로 구분)"
+        <MudTextField @bind-value="Model.Tags" Label="태그 (쉼표로 구분)"
             Variant="Variant.Outlined" Class="mb-4" />
 
-        <MudTextField @bind-Value="Model.SeoTitle" Label="SEO 제목"
+        <MudTextField @bind-value="Model.SeoTitle" Label="SEO 제목"
             Variant="Variant.Outlined" Class="mb-4" />
 
-        <MudTextField @bind-Value="Model.SeoDescription" Label="SEO 설명"
+        <MudTextField @bind-value="Model.SeoDescription" Label="SEO 설명"
             Variant="Variant.Outlined" Lines="3" Class="mb-4" />
     </AdminFormSection>
 
diff --git a/src/TaxBaik.Web/Components/Admin/Pages/Blog/BlogList.razor b/src/TaxBaik.Web/Components/Admin/Pages/Blog/BlogList.razor
index 2a00925..60b3d6a 100644
--- a/src/TaxBaik.Web/Components/Admin/Pages/Blog/BlogList.razor
+++ b/src/TaxBaik.Web/Components/Admin/Pages/Blog/BlogList.razor
@@ -22,7 +22,7 @@
 </AdminPageHeader>
 
 <div class="d-flex pa-4 gap-4 align-center">
-    <MudTextField @bind-Value="searchQuery" Placeholder="블로그 제목 또는 본문 검색..." Adornment="Adornment.Start" 
+    <MudTextField @bind-value="searchQuery" Placeholder="블로그 제목 또는 본문 검색..." Adornment="Adornment.Start" 
                   AdornmentIcon="@Icons.Material.Filled.Search" IconSize="Size.Medium" Class="flex-grow-1" Immediate="true" Clearable="true" />
 </div>
 
diff --git a/src/TaxBaik.Web/Components/Admin/Pages/Clients/ClientDetail.razor b/src/TaxBaik.Web/Components/Admin/Pages/Clients/ClientDetail.razor
index 9b60205..efa26ad 100644
--- a/src/TaxBaik.Web/Components/Admin/Pages/Clients/ClientDetail.razor
+++ b/src/TaxBaik.Web/Components/Admin/Pages/Clients/ClientDetail.razor
@@ -105,14 +105,14 @@
                             <MudDatePicker @bind-Date="newDate" Label="상담일" DateFormat="yyyy-MM-dd" />
                         </MudItem>
                         <MudItem xs="12" sm="6">
-                        <CommonCodeSelect @bind-Value="newServiceType" Group="CONSULTING_ACTIVITY_TYPE" Label="서비스 분야" Placeholder="선택" Clearable="true" />
+                        <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 *"
+                            <MudTextField T="string" @bind-value="newSummary" Label="상담 내용 *"
                                           Lines="3" Variant="Variant.Outlined" Required="true" />
                         </MudItem>
                         <MudItem xs="12" sm="6">
-                            <MudSelect T="string" @bind-Value="newResult" Label="결과">
+                            <MudSelect T="string" @bind-value="newResult" Label="결과">
                                 <MudSelectItem Value="@("")">-</MudSelectItem>
                                 @foreach (var r in results)
                                 {
@@ -121,7 +121,7 @@
                             </MudSelect>
                         </MudItem>
                         <MudItem xs="12" sm="6">
-                            <MudNumericField T="decimal?" @bind-Value="newFee" Label="수임료 (원)"
+                            <MudNumericField T="decimal?" @bind-value="newFee" Label="수임료 (원)"
                                             Format="N0" />
                         </MudItem>
                     </MudGrid>
diff --git a/src/TaxBaik.Web/Components/Admin/Pages/Clients/ClientEdit.razor b/src/TaxBaik.Web/Components/Admin/Pages/Clients/ClientEdit.razor
index 373992d..7f9d026 100644
--- a/src/TaxBaik.Web/Components/Admin/Pages/Clients/ClientEdit.razor
+++ b/src/TaxBaik.Web/Components/Admin/Pages/Clients/ClientEdit.razor
@@ -35,18 +35,18 @@
                     <MudDivider />
                 </MudItem>
                 <MudItem xs="12" md="6">
-                    <MudTextField @bind-Value="dto.Name" Label="고객명 *" Required="true"
+                    <MudTextField @bind-value="dto.Name" Label="고객명 *" Required="true"
                                   RequiredError="고객명을 입력하세요." />
                 </MudItem>
                 <MudItem xs="12" md="6">
-                    <MudTextField @bind-Value="dto.CompanyName" Label="회사명 (선택)" />
+                    <MudTextField @bind-value="dto.CompanyName" Label="회사명 (선택)" />
                 </MudItem>
                 <MudItem xs="12" md="6">
-                    <MudTextField @bind-Value="dto.Phone" Label="연락처"
+                    <MudTextField @bind-value="dto.Phone" Label="연락처"
                                   Placeholder="010-0000-0000" />
                 </MudItem>
                 <MudItem xs="12" md="6">
-                    <MudTextField @bind-Value="dto.Email" Label="이메일" InputType="InputType.Email" />
+                    <MudTextField @bind-value="dto.Email" Label="이메일" InputType="InputType.Email" />
                 </MudItem>
 
                 @* 세무 정보 *@
@@ -55,10 +55,10 @@
                     <MudDivider />
                 </MudItem>
                 <MudItem xs="12" md="6">
-                    <CommonCodeSelect @bind-Value="dto.ServiceType" Group="CLIENT_SERVICE_TYPE" Label="서비스 유형" Clearable="true" />
+                    <CommonCodeSelect @bind-value="dto.ServiceType" Group="CLIENT_SERVICE_TYPE" Label="서비스 유형" Clearable="true" />
                 </MudItem>
                 <MudItem xs="12" md="6">
-                    <CommonCodeSelect @bind-Value="dto.TaxType" Group="CLIENT_TAX_TYPE" Label="세금 유형" Clearable="true" />
+                    <CommonCodeSelect @bind-value="dto.TaxType" Group="CLIENT_TAX_TYPE" Label="세금 유형" Clearable="true" />
                 </MudItem>
 
                 @* 관리 정보 *@
@@ -67,13 +67,13 @@
                     <MudDivider />
                 </MudItem>
                 <MudItem xs="12" md="6">
-                    <CommonCodeSelect @bind-Value="dto.Status" Group="CLIENT_STATUS" Label="상태 *" Required="true" />
+                    <CommonCodeSelect @bind-value="dto.Status" Group="CLIENT_STATUS" Label="상태 *" Required="true" />
                 </MudItem>
                 <MudItem xs="12" md="6">
-                    <CommonCodeSelect @bind-Value="dto.Source" Group="CLIENT_SOURCE" Label="유입 경로" Clearable="true" />
+                    <CommonCodeSelect @bind-value="dto.Source" Group="CLIENT_SOURCE" Label="유입 경로" Clearable="true" />
                 </MudItem>
                 <MudItem xs="12">
-                    <MudTextField @bind-Value="dto.Memo" Label="메모"
+                    <MudTextField @bind-value="dto.Memo" Label="메모"
                                   Lines="4" AutoGrow="true"
                                   Placeholder="상담 배경, 특이사항, 중요 날짜 등 자유롭게 기록하세요" />
                 </MudItem>
diff --git a/src/TaxBaik.Web/Components/Admin/Pages/Clients/ClientList.razor b/src/TaxBaik.Web/Components/Admin/Pages/Clients/ClientList.razor
index 039554d..0d2065b 100644
--- a/src/TaxBaik.Web/Components/Admin/Pages/Clients/ClientList.razor
+++ b/src/TaxBaik.Web/Components/Admin/Pages/Clients/ClientList.razor
@@ -24,12 +24,12 @@
 <MudPaper Class="admin-surface mb-3 pa-3" Elevation="0">
     <MudGrid>
         <MudItem xs="12" md="5">
-            <MudTextField @bind-Value="searchText" Label="검색 (이름·연락처·회사명)"
+            <MudTextField @bind-value="searchText" Label="검색 (이름·연락처·회사명)"
                           Adornment="Adornment.End" AdornmentIcon="@Icons.Material.Filled.Search"
                           Immediate="false" OnKeyUp="@OnSearchKeyUp" />
         </MudItem>
         <MudItem xs="12" md="3">
-            <CommonCodeSelect @bind-Value="statusFilter" Group="CLIENT_STATUS" Label="상태" Placeholder="전체" Clearable="true" />
+            <CommonCodeSelect @bind-value="statusFilter" Group="CLIENT_STATUS" Label="상태" Placeholder="전체" Clearable="true" />
         </MudItem>
         <MudItem xs="12" md="2" Class="d-flex align-center">
             <MudButton Variant="Variant.Outlined" OnClick="@SearchAsync" FullWidth="true">검색</MudButton>
diff --git a/src/TaxBaik.Web/Components/Admin/Pages/ConsultingActivities.razor b/src/TaxBaik.Web/Components/Admin/Pages/ConsultingActivities.razor
index 8931246..30be7b4 100644
--- a/src/TaxBaik.Web/Components/Admin/Pages/ConsultingActivities.razor
+++ b/src/TaxBaik.Web/Components/Admin/Pages/ConsultingActivities.razor
@@ -98,15 +98,15 @@
     </TitleContent>
     <DialogContent>
         <MudForm @ref="form">
-            <MudSelect T="int" @bind-Value="activityForm.ClientId" Label="고객" Required="true" Variant="Variant.Outlined" FullWidth="true" Class="mb-4">
+            <MudSelect T="int" @bind-value="activityForm.ClientId" Label="고객" Required="true" Variant="Variant.Outlined" FullWidth="true" Class="mb-4">
                 @foreach (var client in clients)
                 {
                     <MudSelectItem Value="@client.Id">@GetClientDisplayName(client)</MudSelectItem>
                 }
             </MudSelect>
-            <CommonCodeSelect @bind-Value="activityForm.ActivityType" Group="CONSULTING_ACTIVITY_TYPE" Label="활동 유형" Class="mb-4" Required="true" />
+            <CommonCodeSelect @bind-value="activityForm.ActivityType" Group="CONSULTING_ACTIVITY_TYPE" Label="활동 유형" Class="mb-4" Required="true" />
             <MudDatePicker @bind-Date="activityForm.ActivityDate" Label="활동일" Variant="Variant.Outlined" FullWidth="true" Class="mb-4" Required="true" />
-            <MudTextField T="string" @bind-Value="activityForm.Description" Label="설명" Variant="Variant.Outlined" FullWidth="true" Lines="3" Class="mb-4" Required="true" />
+            <MudTextField T="string" @bind-value="activityForm.Description" Label="설명" Variant="Variant.Outlined" FullWidth="true" Lines="3" Class="mb-4" Required="true" />
             <MudDatePicker @bind-Date="activityForm.NextFollowupDate" Label="다음 팔로업일" Variant="Variant.Outlined" FullWidth="true" Class="mb-4" />
         </MudForm>
     </DialogContent>
diff --git a/src/TaxBaik.Web/Components/Admin/Pages/Contracts.razor b/src/TaxBaik.Web/Components/Admin/Pages/Contracts.razor
index 1c2a6bc..0f74494 100644
--- a/src/TaxBaik.Web/Components/Admin/Pages/Contracts.razor
+++ b/src/TaxBaik.Web/Components/Admin/Pages/Contracts.razor
@@ -117,16 +117,16 @@ else
                     }
                 </div>
                 <MudForm @ref="form">
-                    <MudSelect T="int?" @bind-Value="contractForm.ClientId" Label="고객" Required="true" Variant="Variant.Outlined" FullWidth="@true" Class="mb-3" RequiredError="고객을 선택하세요." Disabled="@isEditMode">
+                    <MudSelect T="int?" @bind-value="contractForm.ClientId" Label="고객" Required="true" Variant="Variant.Outlined" FullWidth="@true" Class="mb-3" RequiredError="고객을 선택하세요." Disabled="@isEditMode">
                         @foreach (var client in clients)
                         {
                             <MudSelectItem Value="@((int?)client.Id)">@GetClientDisplayName(client)</MudSelectItem>
                         }
                     </MudSelect>
-                    <MudTextField T="string" @bind-Value="contractForm.ContractNumber" Label="계약번호" Variant="Variant.Outlined" FullWidth="@true" Class="mb-3" Required="true" />
-                    <CommonCodeSelect @bind-Value="contractForm.ServiceType" Group="CONTRACT_SERVICE_TYPE" Label="서비스 유형" Class="mb-3" Required="true" />
+                    <MudTextField T="string" @bind-value="contractForm.ContractNumber" Label="계약번호" Variant="Variant.Outlined" FullWidth="@true" Class="mb-3" Required="true" />
+                    <CommonCodeSelect @bind-value="contractForm.ServiceType" Group="CONTRACT_SERVICE_TYPE" Label="서비스 유형" Class="mb-3" Required="true" />
                     <MudDatePicker @bind-Date="contractForm.StartDate" Label="계약 시작일" Variant="Variant.Outlined" FullWidth="@true" Class="mb-3" Required="true" />
-                    <MudNumericField T="decimal?" @bind-Value="contractForm.MonthlyFee" Label="월 수수료" Variant="Variant.Outlined" FullWidth="@true" Class="mb-4" />
+                    <MudNumericField T="decimal?" @bind-value="contractForm.MonthlyFee" Label="월 수수료" Variant="Variant.Outlined" FullWidth="@true" Class="mb-4" />
                     
                     <div class="d-flex justify-end gap-2">
                         @if (isEditMode)
diff --git a/src/TaxBaik.Web/Components/Admin/Pages/Faqs/FaqEdit.razor b/src/TaxBaik.Web/Components/Admin/Pages/Faqs/FaqEdit.razor
index fbf8a92..9979a08 100644
--- a/src/TaxBaik.Web/Components/Admin/Pages/Faqs/FaqEdit.razor
+++ b/src/TaxBaik.Web/Components/Admin/Pages/Faqs/FaqEdit.razor
@@ -24,7 +24,7 @@
         <MudForm @ref="form" @bind-IsValid="isValid">
             <MudGrid Spacing="3">
                 <MudItem xs="12">
-                    <MudTextField @bind-Value="faq.Question"
+                    <MudTextField @bind-value="faq.Question"
                                   Label="질문 *" Required="true"
                                   RequiredError="질문을 입력하세요."
                                   Counter="300" MaxLength="300"
@@ -32,23 +32,23 @@
                                   Placeholder="예: 기장료가 얼마인지 미리 알 수 있나요?" />
                 </MudItem>
                 <MudItem xs="12">
-                    <MudTextField @bind-Value="faq.Answer"
+                    <MudTextField @bind-value="faq.Answer"
                                   Label="답변 *" Required="true"
                                   RequiredError="답변을 입력하세요."
                                   Lines="5" AutoGrow="true"
                                   Placeholder="방문자에게 보여질 답변을 입력하세요." />
                 </MudItem>
                 <MudItem xs="12" md="6">
-                    <CommonCodeSelect @bind-Value="faq.Category" Group="FAQ_CATEGORY" Label="카테고리" Clearable="true" Placeholder="전체" />
+                    <CommonCodeSelect @bind-value="faq.Category" Group="FAQ_CATEGORY" Label="카테고리" Clearable="true" Placeholder="전체" />
                 </MudItem>
                 <MudItem xs="12" md="3">
-                    <MudNumericField @bind-Value="faq.SortOrder"
+                    <MudNumericField @bind-value="faq.SortOrder"
                                      Label="정렬 순서"
                                      HelperText="작을수록 위에 노출"
                                      Min="0" Max="9999" />
                 </MudItem>
                 <MudItem xs="12" md="3" Class="d-flex align-center">
-                    <MudSwitch T="bool" @bind-Value="faq.IsActive" Color="Color.Success"
+                    <MudSwitch T="bool" @bind-value="faq.IsActive" Color="Color.Success"
                                Label="@(faq.IsActive ? "노출 중" : "비활성")" />
                 </MudItem>
 
diff --git a/src/TaxBaik.Web/Components/Admin/Pages/Faqs/FaqList.razor b/src/TaxBaik.Web/Components/Admin/Pages/Faqs/FaqList.razor
index 103ca97..45cb08f 100644
--- a/src/TaxBaik.Web/Components/Admin/Pages/Faqs/FaqList.razor
+++ b/src/TaxBaik.Web/Components/Admin/Pages/Faqs/FaqList.razor
@@ -24,7 +24,7 @@
 </section>
 
 <div class="d-flex pa-4 gap-4 align-center">
-    <MudTextField @bind-Value="searchQuery" Placeholder="질문 또는 답변 검색..." Adornment="Adornment.Start" 
+    <MudTextField @bind-value="searchQuery" Placeholder="질문 또는 답변 검색..." Adornment="Adornment.Start" 
                   AdornmentIcon="@Icons.Material.Filled.Search" IconSize="Size.Medium" Class="flex-grow-1" Immediate="true" Clearable="true" />
 </div>
 
diff --git a/src/TaxBaik.Web/Components/Admin/Pages/Inquiries/InquiryDetail.razor b/src/TaxBaik.Web/Components/Admin/Pages/Inquiries/InquiryDetail.razor
index ffdc1f7..62e7611 100644
--- a/src/TaxBaik.Web/Components/Admin/Pages/Inquiries/InquiryDetail.razor
+++ b/src/TaxBaik.Web/Components/Admin/Pages/Inquiries/InquiryDetail.razor
@@ -60,7 +60,7 @@
             </AdminDetailSection>
 
             <AdminDetailSection Title="담당자 메모" CssClass="pa-4 mt-4">
-                <MudTextField T="string" @bind-Value="adminMemo" Label="내부 메모 (고객에게 미노출)"
+                <MudTextField T="string" @bind-value="adminMemo" Label="내부 메모 (고객에게 미노출)"
                               Lines="4" Variant="Variant.Outlined" />
                 <MudButton Class="mt-2" Variant="Variant.Filled" Color="Color.Primary"
                            OnClick="SaveMemo">메모 저장</MudButton>
diff --git a/src/TaxBaik.Web/Components/Admin/Pages/RevenueTrackings.razor b/src/TaxBaik.Web/Components/Admin/Pages/RevenueTrackings.razor
index 776588f..cfd33f1 100644
--- a/src/TaxBaik.Web/Components/Admin/Pages/RevenueTrackings.razor
+++ b/src/TaxBaik.Web/Components/Admin/Pages/RevenueTrackings.razor
@@ -94,16 +94,16 @@
     </TitleContent>
     <DialogContent>
         <MudForm @ref="form">
-            <MudSelect T="int" @bind-Value="revenueForm.ClientId" Label="고객" Required="true" Variant="Variant.Outlined" FullWidth="true" Class="mb-4">
+            <MudSelect T="int" @bind-value="revenueForm.ClientId" Label="고객" Required="true" Variant="Variant.Outlined" FullWidth="true" Class="mb-4">
                 @foreach (var client in clients)
                 {
                     <MudSelectItem Value="@client.Id">@GetClientDisplayName(client)</MudSelectItem>
                 }
             </MudSelect>
-            <MudTextField T="string" @bind-Value="revenueForm.InvoiceNumber" Label="청구번호" Variant="Variant.Outlined" FullWidth="true" Class="mb-4" Required="true" />
+            <MudTextField T="string" @bind-value="revenueForm.InvoiceNumber" Label="청구번호" Variant="Variant.Outlined" FullWidth="true" Class="mb-4" Required="true" />
             <MudDatePicker @bind-Date="revenueForm.InvoiceDate" Label="청구일" Variant="Variant.Outlined" FullWidth="true" Class="mb-4" Required="true" />
-            <MudNumericField T="decimal" @bind-Value="revenueForm.Amount" Label="청구액" Variant="Variant.Outlined" FullWidth="true" Class="mb-4" Required="true" />
-            <CommonCodeSelect @bind-Value="revenueForm.ServiceType" Group="REVENUE_SERVICE_TYPE" Label="서비스 유형" Class="mb-4" />
+            <MudNumericField T="decimal" @bind-value="revenueForm.Amount" Label="청구액" Variant="Variant.Outlined" FullWidth="true" Class="mb-4" Required="true" />
+            <CommonCodeSelect @bind-value="revenueForm.ServiceType" Group="REVENUE_SERVICE_TYPE" Label="서비스 유형" Class="mb-4" />
             <MudDatePicker @bind-Date="revenueForm.DueDate" Label="납부예정일" Variant="Variant.Outlined" FullWidth="true" Class="mb-4" />
         </MudForm>
     </DialogContent>
diff --git a/src/TaxBaik.Web/Components/Admin/Pages/Settings/SiteSettings.razor b/src/TaxBaik.Web/Components/Admin/Pages/Settings/SiteSettings.razor
index e443d7e..cb35ea2 100644
--- a/src/TaxBaik.Web/Components/Admin/Pages/Settings/SiteSettings.razor
+++ b/src/TaxBaik.Web/Components/Admin/Pages/Settings/SiteSettings.razor
@@ -30,16 +30,16 @@
                 </div>
             </div>
             <MudForm>
-                <MudTextField @bind-Value="phone" Label="전화번호"
+                <MudTextField @bind-value="phone" Label="전화번호"
                     Variant="Variant.Outlined" Class="mb-4" />
 
-                <MudTextField @bind-Value="email" Label="이메일"
+                <MudTextField @bind-value="email" Label="이메일"
                     Variant="Variant.Outlined" Class="mb-4" />
 
-                <MudTextField @bind-Value="kakaoUrl" Label="카카오채널 URL"
+                <MudTextField @bind-value="kakaoUrl" Label="카카오채널 URL"
                     Variant="Variant.Outlined" Class="mb-4" />
 
-                <MudTextField @bind-Value="instagramUrl" Label="인스타그램"
+                <MudTextField @bind-value="instagramUrl" Label="인스타그램"
                     Variant="Variant.Outlined" Class="mb-4" />
 
                 <MudButton Variant="Variant.Filled" Color="Color.Primary"
@@ -59,13 +59,13 @@
             </div>
 
             <MudForm>
-                <MudTextField @bind-Value="currentPassword" Label="현재 비밀번호" InputType="InputType.Password"
+                <MudTextField @bind-value="currentPassword" Label="현재 비밀번호" InputType="InputType.Password"
                     Variant="Variant.Outlined" Class="mb-4" />
 
-                <MudTextField @bind-Value="newPassword" Label="새 비밀번호" InputType="InputType.Password"
+                <MudTextField @bind-value="newPassword" Label="새 비밀번호" InputType="InputType.Password"
                     Variant="Variant.Outlined" Class="mb-4" />
 
-                <MudTextField @bind-Value="confirmNewPassword" Label="새 비밀번호 확인" InputType="InputType.Password"
+                <MudTextField @bind-value="confirmNewPassword" Label="새 비밀번호 확인" InputType="InputType.Password"
                     Variant="Variant.Outlined" Class="mb-4" />
 
                 <MudButton Variant="Variant.Filled" Color="Color.Primary"
diff --git a/src/TaxBaik.Web/Components/Admin/Pages/TaxFilingSchedules.razor b/src/TaxBaik.Web/Components/Admin/Pages/TaxFilingSchedules.razor
index 70e6562..258ef67 100644
--- a/src/TaxBaik.Web/Components/Admin/Pages/TaxFilingSchedules.razor
+++ b/src/TaxBaik.Web/Components/Admin/Pages/TaxFilingSchedules.razor
@@ -130,7 +130,7 @@ else
                 </div>
                 <MudForm @ref="form">
                     <MudSelect T="int?"
-                               @bind-Value="scheduleForm.ClientId"
+                               @bind-value="scheduleForm.ClientId"
                                Label="고객"
                                Required="true"
                                Variant="Variant.Outlined"
@@ -143,9 +143,9 @@ else
                             <MudSelectItem Value="@((int?)client.Id)">@GetClientDisplayName(client)</MudSelectItem>
                         }
                     </MudSelect>
-                    <CommonCodeSelect @bind-Value="scheduleForm.FilingType" Group="FILING_TYPE" Label="신고 유형" Class="mb-3" Required="true" />
+                    <CommonCodeSelect @bind-value="scheduleForm.FilingType" Group="FILING_TYPE" Label="신고 유형" Class="mb-3" Required="true" />
                     <MudDatePicker @bind-Date="scheduleForm.DueDate" Label="마감일" Variant="Variant.Outlined" FullWidth="@true" Class="mb-3" Required="true" />
-                    <MudNumericField T="int" @bind-Value="scheduleForm.FilingYear" Label="신고연도" Variant="Variant.Outlined" FullWidth="@true" Class="mb-4" Required="true" />
+                    <MudNumericField T="int" @bind-value="scheduleForm.FilingYear" Label="신고연도" Variant="Variant.Outlined" FullWidth="@true" Class="mb-4" Required="true" />
                     
                     <div class="d-flex justify-end gap-2">
                         @if (isEditMode && selectedSchedule?.Status != "completed")
diff --git a/src/TaxBaik.Web/Components/Admin/Pages/TaxFilings/TaxFilingList.razor b/src/TaxBaik.Web/Components/Admin/Pages/TaxFilings/TaxFilingList.razor
index 3ed1039..a0b8be8 100644
--- a/src/TaxBaik.Web/Components/Admin/Pages/TaxFilings/TaxFilingList.razor
+++ b/src/TaxBaik.Web/Components/Admin/Pages/TaxFilings/TaxFilingList.razor
@@ -29,20 +29,20 @@
         <MudText Typo="Typo.h6" Class="mb-3">새 신고 일정</MudText>
         <MudGrid Spacing="2">
             <MudItem xs="12" sm="6" md="4">
-                <MudAutocomplete T="Domain.Entities.Client" @bind-Value="selectedClient"
+                <MudAutocomplete T="Domain.Entities.Client" @bind-value="selectedClient"
                                  Label="고객 검색 *"
                                  SearchFunc="SearchClients"
                                  ToStringFunc="@(c => c == null ? "" : $"{c.Name} {c.CompanyName ?? ""}")"
                                  Variant="Variant.Outlined" />
             </MudItem>
             <MudItem xs="12" sm="6" md="4">
-            <CommonCodeSelect @bind-Value="newFilingType" Group="FILING_TYPE" Label="신고 유형 *" />
+            <CommonCodeSelect @bind-value="newFilingType" Group="FILING_TYPE" Label="신고 유형 *" />
             </MudItem>
             <MudItem xs="12" sm="6" md="4">
                 <MudDatePicker @bind-Date="newDueDate" Label="신고 기한 *" DateFormat="yyyy-MM-dd" />
             </MudItem>
             <MudItem xs="12">
-                <MudTextField T="string" @bind-Value="newMemo" Label="메모" Variant="Variant.Outlined" />
+                <MudTextField T="string" @bind-value="newMemo" Label="메모" Variant="Variant.Outlined" />
             </MudItem>
         </MudGrid>
         <MudStack Row="true" Class="mt-3" Spacing="2">
diff --git a/src/TaxBaik.Web/Components/Admin/Pages/TaxProfiles.razor b/src/TaxBaik.Web/Components/Admin/Pages/TaxProfiles.razor
index 0595325..8874286 100644
--- a/src/TaxBaik.Web/Components/Admin/Pages/TaxProfiles.razor
+++ b/src/TaxBaik.Web/Components/Admin/Pages/TaxProfiles.razor
@@ -95,16 +95,16 @@ else
                     }
                 </div>
                 <MudForm @ref="form">
-                    <MudSelect T="int?" @bind-Value="profileForm.ClientId" Label="고객" Required="true" Variant="Variant.Outlined" FullWidth="@true" Class="mb-3" RequiredError="고객을 선택하세요." Disabled="@isEditMode">
+                    <MudSelect T="int?" @bind-value="profileForm.ClientId" Label="고객" Required="true" Variant="Variant.Outlined" FullWidth="@true" Class="mb-3" RequiredError="고객을 선택하세요." Disabled="@isEditMode">
                         @foreach (var client in clients)
                         {
                             <MudSelectItem Value="@((int?)client.Id)">@GetClientDisplayName(client)</MudSelectItem>
                         }
                     </MudSelect>
-                    <CommonCodeSelect @bind-Value="profileForm.BusinessType" Group="BUSINESS_TYPE" Label="사업 유형" Class="mb-3" Required="true" />
-                    <CommonCodeSelect @bind-Value="profileForm.TaxRiskLevel" Group="TAX_RISK_LEVEL" Label="위험도" Class="mb-3" />
+                    <CommonCodeSelect @bind-value="profileForm.BusinessType" Group="BUSINESS_TYPE" Label="사업 유형" Class="mb-3" Required="true" />
+                    <CommonCodeSelect @bind-value="profileForm.TaxRiskLevel" Group="TAX_RISK_LEVEL" Label="위험도" Class="mb-3" />
                     <MudDatePicker @bind-Date="profileForm.NextFilingDueDate" Label="다음 신고 예정일" Variant="Variant.Outlined" FullWidth="@true" Class="mb-3" />
-                    <MudTextField T="string" @bind-Value="profileForm.SpecialNotes" Label="특수 사항" Variant="Variant.Outlined" FullWidth="@true" Lines="3" Class="mb-4" />
+                    <MudTextField T="string" @bind-value="profileForm.SpecialNotes" Label="특수 사항" Variant="Variant.Outlined" FullWidth="@true" Lines="3" Class="mb-4" />
                     
                     <div class="d-flex justify-end gap-2">
                         @if (isEditMode)
diff --git a/src/TaxBaik.Web/Components/Admin/Shared/CommonCodeListPanel.razor b/src/TaxBaik.Web/Components/Admin/Shared/CommonCodeListPanel.razor
index ca302c7..83c75e9 100644
--- a/src/TaxBaik.Web/Components/Admin/Shared/CommonCodeListPanel.razor
+++ b/src/TaxBaik.Web/Components/Admin/Shared/CommonCodeListPanel.razor
@@ -27,10 +27,10 @@
 
     <AdminFormSection Title="코드 편집" Description="공백 없는 값과 일관된 이름만 허용합니다.">
         <MudForm>
-            <MudTextField @bind-Value="EditModel.CodeGroup" Label="그룹" Variant="Variant.Outlined" FullWidth="true" Required="true" Disabled="@(!IsCreateMode)" MaxLength="80" Class="mb-3" />
-            <MudTextField @bind-Value="EditModel.CodeValue" Label="값" Variant="Variant.Outlined" FullWidth="true" Required="true" Disabled="@(!IsCreateMode)" MaxLength="120" Class="mb-3" />
-            <MudTextField @bind-Value="EditModel.CodeName" Label="이름" Variant="Variant.Outlined" FullWidth="true" Required="true" MaxLength="200" Class="mb-3" />
-            <MudNumericField T="int" @bind-Value="EditModel.SortOrder" Label="순서" Variant="Variant.Outlined" FullWidth="true" Class="mb-3" />
+            <MudTextField @bind-value="EditModel.CodeGroup" Label="그룹" Variant="Variant.Outlined" FullWidth="true" Required="true" Disabled="@(!IsCreateMode)" MaxLength="80" Class="mb-3" />
+            <MudTextField @bind-value="EditModel.CodeValue" Label="값" Variant="Variant.Outlined" FullWidth="true" Required="true" Disabled="@(!IsCreateMode)" MaxLength="120" Class="mb-3" />
+            <MudTextField @bind-value="EditModel.CodeName" Label="이름" Variant="Variant.Outlined" FullWidth="true" Required="true" MaxLength="200" Class="mb-3" />
+            <MudNumericField T="int" @bind-value="EditModel.SortOrder" Label="순서" Variant="Variant.Outlined" FullWidth="true" Class="mb-3" />
             <MudSwitch @bind-Checked="EditModel.IsActive" Color="Color.Primary">활성</MudSwitch>
             <div class="d-flex gap-2 mt-4">
                 <MudButton Variant="Variant.Filled" Color="Color.Primary" OnClick="OnSaveRequested">저장</MudButton>
diff --git a/src/TaxBaik.Web/Components/Admin/_Imports.razor b/src/TaxBaik.Web/Components/Admin/_Imports.razor
index c43ac24..38fe72a 100644
--- a/src/TaxBaik.Web/Components/Admin/_Imports.razor
+++ b/src/TaxBaik.Web/Components/Admin/_Imports.razor
@@ -9,9 +9,12 @@
 @using Microsoft.AspNetCore.Components.WebAssembly.Http
 @using Microsoft.JSInterop
 @using MudBlazor
+@using TaxBaik.Application.Services
+@using TaxBaik.Application.Seasonal
 @using TaxBaik.Web.Components.Admin
 @using TaxBaik.Web.Components.Admin.Services
 @using TaxBaik.Web.Components.Admin.Services.AdminClients
+@using TaxBaik.Web.Components.Admin.Shared
 @using TaxBaik.Application.DTOs
 @using TaxBaik.Domain.Entities
 @using static Microsoft.AspNetCore.Components.Web.RenderMode