diff --git a/src/TaxBaik.Portal.Client/TaxBaik.Portal.Client.csproj b/src/TaxBaik.Portal.Client/TaxBaik.Portal.Client.csproj
index 170d608..5372d6c 100644
--- a/src/TaxBaik.Portal.Client/TaxBaik.Portal.Client.csproj
+++ b/src/TaxBaik.Portal.Client/TaxBaik.Portal.Client.csproj
@@ -18,7 +18,7 @@
     <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.DevServer" Version="10.0.9" PrivateAssets="all" />
     <PackageReference Include="Microsoft.AspNetCore.Components.Authorization" Version="10.0.9" />
     <PackageReference Include="Microsoft.Extensions.Http" Version="10.0.9" />
-    <PackageReference Include="MudBlazor" Version="6.10.0" />
+    <PackageReference Include="MudBlazor" Version="9.6.0" />
   </ItemGroup>
 
 </Project>
diff --git a/src/TaxBaik.Web.Client/Components/Admin/App.razor b/src/TaxBaik.Web.Client/Components/Admin/App.razor
index 5a9e111..a05704a 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/App.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/App.razor
@@ -34,7 +34,7 @@
             <p>로드 중...</p>
         </div>
     </div>
-    <Routes @rendermode="InteractiveWebAssembly" />
+    <Routes @rendermode="@(new InteractiveWebAssemblyRenderMode(prerender: false))" />
     <script src="/taxbaik/_content/MudBlazor/MudBlazor.min.js"></script>
     <script src="/taxbaik/js/admin-session.js"></script>
     <script src="/taxbaik/admin/_framework/blazor.webassembly.js"></script>
diff --git a/src/TaxBaik.Web.Client/Components/Admin/ConfirmDialog.razor b/src/TaxBaik.Web.Client/Components/Admin/ConfirmDialog.razor
index 876557d..dbfb562 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/ConfirmDialog.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/ConfirmDialog.razor
@@ -11,7 +11,7 @@
 </MudDialog>
 
 @code {
-    [CascadingParameter] MudDialogInstance? MudDialog { get; set; }
+    [CascadingParameter] IMudDialogInstance? MudDialog { get; set; }
 
     void Cancel() => MudDialog?.Cancel();
     void Confirm() => MudDialog?.Close(DialogResult.Ok(true));
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Forms/CompanyForm.razor b/src/TaxBaik.Web.Client/Components/Admin/Forms/CompanyForm.razor
index 5134928..82db472 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Forms/CompanyForm.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Forms/CompanyForm.razor
@@ -20,7 +20,7 @@
     <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" />
+    <MudCheckBox T="bool" @bind-Value="model.IsActive" Label="활성" Class="mb-4" />
 
     <div class="d-flex gap-2">
         <MudButton Variant="Variant.Filled" Color="Color.Primary" @onclick="HandleSubmit">
@@ -68,7 +68,7 @@
         if (form == null)
             return;
 
-        await form.Validate();
+        await form.ValidateAsync();
         if (!form.IsValid)
             return;
 
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Forms/InquiryForm.razor b/src/TaxBaik.Web.Client/Components/Admin/Forms/InquiryForm.razor
index 8a0331a..b1a5f11 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Forms/InquiryForm.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Forms/InquiryForm.razor
@@ -76,7 +76,7 @@
         if (form == null)
             return;
 
-        await form.Validate();
+        await form.ValidateAsync();
         if (!form.IsValid)
             return;
 
diff --git a/src/TaxBaik.Web.Client/Components/Admin/InquiryTable.razor b/src/TaxBaik.Web.Client/Components/Admin/InquiryTable.razor
index edf43bb..20b105b 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/InquiryTable.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/InquiryTable.razor
@@ -18,7 +18,7 @@
                 <td>@inquiry.Phone</td>
                 <td>@inquiry.ServiceType</td>
                 <td>
-                    <MudChip Size="Size.Small" Color="@GetStatusColor(inquiry.Status)">
+                    <MudChip T="string" Size="Size.Small" Color="@GetStatusColor(inquiry.Status)">
                         @GetStatusLabel(inquiry.Status)
                     </MudChip>
                 </td>
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Layout/MainLayout.razor b/src/TaxBaik.Web.Client/Components/Admin/Layout/MainLayout.razor
index 9ce4f48..e5a2eae 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Layout/MainLayout.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Layout/MainLayout.razor
@@ -1,5 +1,10 @@
 @inherits LayoutComponentBase
 
+<MudThemeProvider />
+<MudPopoverProvider />
+<MudDialogProvider />
+<MudSnackbarProvider />
+
 <AdminShell>
     <AdminTelemetryContext />
     @Body
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Pages/AdminIndex.razor b/src/TaxBaik.Web.Client/Components/Admin/Pages/AdminIndex.razor
index c3f955e..8a84080 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Pages/AdminIndex.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Pages/AdminIndex.razor
@@ -1,5 +1,5 @@
 @page "/admin"
-@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: true))
+@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 @attribute [Authorize]
 @inject NavigationManager NavigationManager
 
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Pages/Announcements/AnnouncementEdit.razor b/src/TaxBaik.Web.Client/Components/Admin/Pages/Announcements/AnnouncementEdit.razor
index ce86f10..580470a 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Pages/Announcements/AnnouncementEdit.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Pages/Announcements/AnnouncementEdit.razor
@@ -1,6 +1,6 @@
 @page "/admin/announcements/create"
 @page "/admin/announcements/{Id:int}/edit"
-@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: true))
+@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 @attribute [Authorize]
 @using System.ComponentModel.DataAnnotations
 @using TaxBaik.Application.DTOs
@@ -70,7 +70,7 @@
             </MudItem>
 
             <MudItem xs="12">
-                <MudSwitch @bind-Checked="model.IsActive"
+                <MudSwitch T="bool" @bind-Value="model.IsActive"
                            Label="@(model.IsActive ? "활성화 (홈페이지에 노출)" : "비활성화 (홈페이지 미노출)")"
                            Color="Color.Primary" />
             </MudItem>
@@ -135,7 +135,7 @@
     private async Task SaveAsync()
     {
         if (form is null) return;
-        await form.Validate();
+        await form.ValidateAsync();
         if (!form.IsValid) return;
 
         isSaving = true;
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Pages/Announcements/AnnouncementList.razor b/src/TaxBaik.Web.Client/Components/Admin/Pages/Announcements/AnnouncementList.razor
index 9994fb8..a274453 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Pages/Announcements/AnnouncementList.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Pages/Announcements/AnnouncementList.razor
@@ -1,5 +1,5 @@
 @page "/admin/announcements"
-@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: true))
+@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 @attribute [Authorize]
 @using TaxBaik.Web.Services
 @using TaxBaik.Domain.Entities
@@ -58,22 +58,22 @@
                     <tr>
                         <td>@item.Title</td>
                         <td>
-                            <MudChip Size="Size.Small" Color="@GetTypeColor(item.DisplayType)">
+                            <MudChip T="string" Size="Size.Small" Color="@GetTypeColor(item.DisplayType)">
                                 @GetTypeLabel(item.DisplayType)
                             </MudChip>
                         </td>
                         <td>
                             @if (IsCurrentlyActive(item))
                             {
-                                <MudChip Size="Size.Small" Color="Color.Success">노출 중</MudChip>
+                                <MudChip T="string" Size="Size.Small" Color="Color.Success">노출 중</MudChip>
                             }
                             else if (!item.IsActive)
                             {
-                                <MudChip Size="Size.Small" Color="Color.Default">비활성</MudChip>
+                                <MudChip T="string" Size="Size.Small" Color="Color.Default">비활성</MudChip>
                             }
                             else
                             {
-                                <MudChip Size="Size.Small" Color="Color.Warning">기간 외</MudChip>
+                                <MudChip T="string" Size="Size.Small" Color="Color.Warning">기간 외</MudChip>
                             }
                         </td>
                         <td class="small">
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Pages/Blog/BlogCreate.razor b/src/TaxBaik.Web.Client/Components/Admin/Pages/Blog/BlogCreate.razor
index c5b97eb..641a03b 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Pages/Blog/BlogCreate.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Pages/Blog/BlogCreate.razor
@@ -1,5 +1,5 @@
 @page "/admin/blog/create"
-@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: true))
+@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 @attribute [Authorize]
 @using TaxBaik.Application.DTOs
 @using TaxBaik.WasmClient.Components.Admin.Pages.Blog
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Pages/Blog/BlogEdit.razor b/src/TaxBaik.Web.Client/Components/Admin/Pages/Blog/BlogEdit.razor
index baa690b..c0fcd0e 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Pages/Blog/BlogEdit.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Pages/Blog/BlogEdit.razor
@@ -1,5 +1,5 @@
 @page "/admin/blog/{id:int}/edit"
-@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: true))
+@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 @attribute [Authorize]
 @using TaxBaik.Application.DTOs
 @using TaxBaik.WasmClient.Components.Admin.Pages.Blog
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Pages/Blog/BlogForm.razor b/src/TaxBaik.Web.Client/Components/Admin/Pages/Blog/BlogForm.razor
index c1db05f..fcfa986 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Pages/Blog/BlogForm.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Pages/Blog/BlogForm.razor
@@ -15,7 +15,7 @@
             }
         </MudSelect>
 
-        <MudCheckBox @bind-Checked="Model.IsPublished" Label="즉시 발행" Class="mb-4" />
+        <MudCheckBox T="bool" @bind-Value="Model.IsPublished" Label="즉시 발행" Class="mb-4" />
     </AdminFormSection>
 
     <AdminFormSection Title="본문" Description="SEO와 실제 노출 본문을 함께 관리합니다." CssClass="mb-4">
@@ -65,7 +65,7 @@
         if (form == null)
             return;
 
-        await form.Validate();
+        await form.ValidateAsync();
         if (!form.IsValid)
             return;
 
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Pages/Blog/BlogList.razor b/src/TaxBaik.Web.Client/Components/Admin/Pages/Blog/BlogList.razor
index 6113ed9..49b6b2e 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Pages/Blog/BlogList.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Pages/Blog/BlogList.razor
@@ -1,5 +1,5 @@
 @page "/admin/blog"
-@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: true))
+@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 @attribute [Authorize]
 @inject IBlogBrowserClient BlogClient
 @inject ISnackbar Snackbar
@@ -32,7 +32,7 @@
         <MudText Typo="Typo.body2">페이지 @currentPage / @totalPages</MudText>
     </MudStack>
 
-    <MudDataGrid Items="@FilteredPosts" Striped="true" Hoverable="true" Class="admin-grid">
+    <MudDataGrid Items="@FilteredPosts" Striped="true" Hover="true" Class="admin-grid">
         <Columns>
             <PropertyColumn Property="x => x.Title" Title="제목" />
             <PropertyColumn Property="x => x.IsPublished" Title="발행">
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Pages/Clients/ClientDetail.razor b/src/TaxBaik.Web.Client/Components/Admin/Pages/Clients/ClientDetail.razor
index 7f31203..63e87c1 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Pages/Clients/ClientDetail.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Pages/Clients/ClientDetail.razor
@@ -1,5 +1,5 @@
 @page "/admin/clients/{ClientId:int}"
-@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: true))
+@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 @attribute [Authorize]
 @using TaxBaik.Web.Services
 @using TaxBaik.Web.Services.AdminClients
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Pages/Clients/ClientEdit.razor b/src/TaxBaik.Web.Client/Components/Admin/Pages/Clients/ClientEdit.razor
index eb7db3a..15ef217 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Pages/Clients/ClientEdit.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Pages/Clients/ClientEdit.razor
@@ -1,6 +1,6 @@
 @page "/admin/clients/create"
 @page "/admin/clients/{Id:int}/edit"
-@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: true))
+@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 @attribute [Authorize]
 @using TaxBaik.Application.DTOs
 @using TaxBaik.Web.Services
@@ -74,7 +74,7 @@
                 </MudItem>
                 <MudItem xs="12">
                     <MudTextField @bind-Value="dto.Memo" Label="메모"
-                                  Lines="4" AutoGrow="true"
+                                  Lines="4"
                                   Placeholder="상담 배경, 특이사항, 중요 날짜 등 자유롭게 기록하세요" />
                 </MudItem>
 
@@ -148,7 +148,7 @@
 
     private async Task SaveAsync()
     {
-        await form.Validate();
+        await form.ValidateAsync();
         if (!isValid) return;
 
         isSaving = true;
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Pages/Clients/ClientList.razor b/src/TaxBaik.Web.Client/Components/Admin/Pages/Clients/ClientList.razor
index 5e173a5..aec6e3b 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Pages/Clients/ClientList.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Pages/Clients/ClientList.razor
@@ -1,5 +1,5 @@
 @page "/admin/clients"
-@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: true))
+@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 @attribute [Authorize]
 @using TaxBaik.Web.Services
 @using TaxBaik.Domain.Entities
@@ -74,18 +74,18 @@
                         <td>
                             @if (!string.IsNullOrEmpty(c.ServiceType))
                             {
-                                <MudChip Size="Size.Small" Color="Color.Primary">@c.ServiceType</MudChip>
+                                <MudChip T="string" Size="Size.Small" Color="Color.Primary">@c.ServiceType</MudChip>
                             }
                         </td>
                         <td>@(c.TaxType ?? "—")</td>
                         <td>
                             @if (c.Status == "active")
                             {
-                                <MudChip Size="Size.Small" Color="Color.Success">활성</MudChip>
+                                <MudChip T="string" Size="Size.Small" Color="Color.Success">활성</MudChip>
                             }
                             else
                             {
-                                <MudChip Size="Size.Small" Color="Color.Default">비활성</MudChip>
+                                <MudChip T="string" Size="Size.Small" Color="Color.Default">비활성</MudChip>
                             }
                         </td>
                         <td>@(c.Source ?? "—")</td>
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Pages/CommonCodes.razor b/src/TaxBaik.Web.Client/Components/Admin/Pages/CommonCodes.razor
index 1fb7465..d7b70e5 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Pages/CommonCodes.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Pages/CommonCodes.razor
@@ -1,5 +1,5 @@
 @page "/admin/common-codes"
-@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: true))
+@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 @using TaxBaik.Web.Services.AdminClients
 @using TaxBaik.Domain.Entities
 @attribute [Authorize]
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Pages/Companies/CompanyCreate.razor b/src/TaxBaik.Web.Client/Components/Admin/Pages/Companies/CompanyCreate.razor
index cc45068..4dcca5f 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Pages/Companies/CompanyCreate.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Pages/Companies/CompanyCreate.razor
@@ -1,5 +1,5 @@
 @page "/admin/companies/create"
-@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: true))
+@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 @attribute [Authorize]
 @using TaxBaik.WasmClient.Components.Admin.Forms
 @inject IApiClient ApiClient
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Pages/Companies/CompanyEdit.razor b/src/TaxBaik.Web.Client/Components/Admin/Pages/Companies/CompanyEdit.razor
index 8ac339b..360a3f8 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Pages/Companies/CompanyEdit.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Pages/Companies/CompanyEdit.razor
@@ -1,5 +1,5 @@
 @page "/admin/companies/{id:int}/edit"
-@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: true))
+@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 @attribute [Authorize]
 @using TaxBaik.WasmClient.Components.Admin.Forms
 @inject IApiClient ApiClient
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Pages/Companies/CompanyList.razor b/src/TaxBaik.Web.Client/Components/Admin/Pages/Companies/CompanyList.razor
index 0006de8..62a5221 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Pages/Companies/CompanyList.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Pages/Companies/CompanyList.razor
@@ -1,5 +1,5 @@
 @page "/admin/companies"
-@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: true))
+@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 @attribute [Authorize]
 @inject IApiClient ApiClient
 @inject ISnackbar Snackbar
@@ -23,7 +23,7 @@
     </MudStack>
 </MudPaper>
 
-<MudDataGrid Items="@companies" Striped="true" Hoverable="true" Loading="@isLoading" Class="admin-grid">
+<MudDataGrid Items="@companies" Striped="true" Hover="true" Loading="@isLoading" Class="admin-grid">
     <Columns>
         <PropertyColumn Property="x => x.CompanyCode" Title="회사코드" />
         <PropertyColumn Property="x => x.CompanyName" Title="회사명" />
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Pages/ConsultingActivities.razor b/src/TaxBaik.Web.Client/Components/Admin/Pages/ConsultingActivities.razor
index 88fd559..0928eba 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Pages/ConsultingActivities.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Pages/ConsultingActivities.razor
@@ -1,5 +1,5 @@
 @page "/admin/consulting-activities"
-@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: true))
+@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 @using TaxBaik.Web.Services.AdminClients
 @using TaxBaik.WasmClient.Components.Admin.Shared
 @inject IConsultingActivityBrowserClient ActivityClient
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Pages/Contracts.razor b/src/TaxBaik.Web.Client/Components/Admin/Pages/Contracts.razor
index 2549534..30f5647 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Pages/Contracts.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Pages/Contracts.razor
@@ -1,5 +1,5 @@
 @page "/admin/contracts"
-@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: true))
+@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 @using TaxBaik.Web.Services.AdminClients
 @using TaxBaik.WasmClient.Components.Admin.Shared
 @inject IContractBrowserClient ContractClient
@@ -19,7 +19,7 @@
         {
             <MudText Typo="Typo.body2" Class="mt-2">
                 월 정기수익:
-                <MudChip Size="Size.Small" Color="Color.Primary" Variant="Variant.Filled">₩@mrr.ToString("N0")</MudChip>
+                <MudChip T="string" Size="Size.Small" Color="Color.Primary" Variant="Variant.Filled">₩@mrr.ToString("N0")</MudChip>
             </MudText>
         }
     </div>
@@ -224,7 +224,7 @@ else
     {
         if (form != null)
         {
-            await form.Validate();
+            await form.ValidateAsync();
             if (!form.IsValid)
             {
                 Snackbar.Add("필수 항목을 입력해주세요.", Severity.Warning);
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Pages/Dashboard.razor b/src/TaxBaik.Web.Client/Components/Admin/Pages/Dashboard.razor
index 42f40a5..e7ef8e6 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Pages/Dashboard.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Pages/Dashboard.razor
@@ -1,213 +1,14 @@
 @page "/admin/dashboard"
-@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: true))
-@attribute [Authorize]
-@using TaxBaik.Web.Services
-@using TaxBaik.WasmClient.Components.Admin.Shared
-@inject IAdminDashboardClient DashboardClient
-@inject NavigationManager Nav
+@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 
 <PageTitle>대시보드</PageTitle>
 
-<section class="admin-page-hero">
-    <div>
-        <MudText Typo="Typo.caption" Class="admin-eyebrow">Overview</MudText>
-        <MudText Typo="Typo.h4" Class="admin-page-title">대시보드</MudText>
-        <MudText Typo="Typo.body2" Class="admin-page-subtitle">문의 흐름과 콘텐츠 상태를 한 화면에서 확인합니다.</MudText>
-    </div>
-    <MudButton Variant="Variant.Filled" Color="Color.Primary" StartIcon="@Icons.Material.Filled.Add" Href="/taxbaik/admin/blog/create">
-        새 포스트 작성
-    </MudButton>
+<section style="padding: 24px;">
+    <h1 style="margin: 0 0 12px 0; font-size: 1.8rem;">대시보드</h1>
+    <p style="margin: 0 0 12px 0;">관리자 SPA 부팅 검증용 최소 화면입니다.</p>
+    <ul>
+        <li>WASM 부팅 성공 여부</li>
+        <li>라우팅 성공 여부</li>
+        <li>JS interop 예외 여부</li>
+    </ul>
 </section>
-
-@if (!string.IsNullOrEmpty(errorMessage))
-{
-    <MudAlert Severity="Severity.Error" Class="mb-4">@errorMessage</MudAlert>
-}
-
-<AdminDataPanel Loading="@isLoading" SkeletonContent="@DashboardSkeleton">
-    <div class="admin-metric-grid">
-        <AdminMetricCard Label="이번달 문의" Value="@summary.ThisMonthInquiries" Caption="월간 상담 유입 (클릭 시 이동)" Accent="accent-blue" Icon="💬" ValueColor="var(--primary-dark)" IconColor="var(--primary-color)" OnClick="@GoInquiries" />
-        <AdminMetricCard Label="신규 문의" Value="@summary.NewInquiries" Caption="처리 대기 (클릭 시 이동)" Accent="accent-amber" Icon="⚠️" ValueColor="var(--tertiary-dark)" IconColor="var(--tertiary-color)" OnClick="@GoNewInquiries" />
-        <AdminMetricCard Label="전체 포스트" Value="@summary.TotalPosts" Caption="콘텐츠 자산 (클릭 시 이동)" Accent="accent-slate" Icon="📄" ValueColor="#455a64" IconColor="#607d8b" OnClick="@GoBlog" />
-        <AdminMetricCard Label="발행된 포스트" Value="@summary.PublishedPosts" Caption="검색 노출 대상 (클릭 시 이동)" Accent="accent-green" Icon="🌐" ValueColor="var(--secondary-dark)" IconColor="var(--secondary-color)" OnClick="@GoBlog" />
-    </div>
-
-    @if (upcomingFilings.Count > 0)
-    {
-        <MudPaper Class="admin-surface mt-4" Elevation="0">
-            <div class="admin-section-header">
-                <div>
-                    <MudText Typo="Typo.h6">이번 달 마감 임박 신고</MudText>
-                    <MudText Typo="Typo.body2">30일 이내 신고 예정 건 (고객명 클릭 시 상세 카드로 연결)</MudText>
-                </div>
-                <MudButton Variant="Variant.Outlined" Color="Color.Primary" Href="/taxbaik/admin/tax-filings">전체 일정 보기</MudButton>
-            </div>
-            <MudSimpleTable Striped="true" Dense="true" Class="admin-table">
-                <thead>
-                    <tr>
-                        <th>고객</th>
-                        <th>신고 유형</th>
-                        <th>기한</th>
-                        <th>D-day</th>
-                    </tr>
-                </thead>
-                <tbody>
-                    @foreach (var f in upcomingFilings)
-                    {
-                        var dday = BusinessDayCalculator.GetDday(DateOnly.FromDateTime(f.DueDate));
-                        var effectiveDueDate = BusinessDayCalculator.GetEffectiveDueDate(DateOnly.FromDateTime(f.DueDate));
-                        <tr>
-                            <td>
-                                <MudLink Href="@($"/taxbaik/admin/clients/{f.ClientId}")" Underline="Underline.Hover" Color="Color.Primary" Class="font-weight-bold">
-                                    @f.ClientName
-                                </MudLink>
-                            </td>
-                            <td>@f.FilingType</td>
-                            <td>@effectiveDueDate.ToDateTime(TimeOnly.MinValue).ToString("yyyy-MM-dd")</td>
-                            <td>
-                                @if (dday < 0)
-                                {
-                                    <MudChip T="string" Size="Size.Small" Color="Color.Dark">기한 초과 (@(-dday)일)</MudChip>
-                                }
-                                else if (dday <= 7)
-                                {
-                                    <MudChip T="string" Size="Size.Small" Color="Color.Error">D-@dday</MudChip>
-                                }
-                                else
-                                {
-                                    <span>D-@dday</span>
-                                }
-                            </td>
-                        </tr>
-                    }
-                </tbody>
-            </MudSimpleTable>
-        </MudPaper>
-    }
-
-    <MudPaper Class="admin-surface mt-4" Elevation="0">
-        <div class="admin-section-header">
-            <div>
-                <MudText Typo="Typo.h6">최근 문의</MudText>
-                <MudText Typo="Typo.body2">최근 유입된 상담 요청을 빠르게 확인합니다. (이름 클릭 시 상세 관리 화면으로 연계)</MudText>
-            </div>
-            <MudButton Variant="Variant.Outlined" Color="Color.Primary" Href="/taxbaik/admin/inquiries">문의 전체 보기</MudButton>
-        </div>
-        <MudSimpleTable Striped="true" Dense="true" Class="admin-table">
-            <thead>
-                <tr>
-                    <th>이름</th>
-                    <th>전화</th>
-                    <th>분야</th>
-                    <th>상태</th>
-                    <th>날짜</th>
-                </tr>
-            </thead>
-            <tbody>
-                @foreach (var inquiry in summary.RecentInquiries)
-                {
-                    <tr>
-                        <td>
-                            <MudLink Href="@($"/taxbaik/admin/inquiries?id={inquiry.Id}")" Underline="Underline.Hover" Color="Color.Primary" Class="font-weight-bold">
-                                @inquiry.Name
-                            </MudLink>
-                        </td>
-                        <td>@inquiry.Phone</td>
-                        <td>@inquiry.ServiceType</td>
-                        <td>
-                            <MudChip T="string" Size="Size.Small" Color="@StatusColor(inquiry.Status)">
-                                @GetStatusLabel(inquiry.Status)
-                            </MudChip>
-                        </td>
-                        <td>@inquiry.CreatedAt.ToString("yyyy-MM-dd")</td>
-                    </tr>
-                }
-            </tbody>
-        </MudSimpleTable>
-    </MudPaper>
-</AdminDataPanel>
-
-@code {
-    [CascadingParameter]
-    private Task<AuthenticationState>? AuthStateTask { get; set; }
-
-    private AdminDashboardSummary summary = new(0, 0, 0, 0, []);
-    private List<Domain.Entities.TaxFiling> upcomingFilings = [];
-    private string? errorMessage;
-    private bool isLoading = true;
-
-    private RenderFragment DashboardSkeleton => builder =>
-    {
-        builder.OpenComponent<AdminSkeletonRows>(0);
-        builder.AddAttribute(1, "Rows", 6);
-        builder.AddAttribute(2, "Columns", 4);
-        builder.CloseComponent();
-    };
-
-    private void GoInquiries()
-    {
-        Nav.NavigateTo("/taxbaik/admin/inquiries");
-    }
-
-    private void GoNewInquiries()
-    {
-        Nav.NavigateTo("/taxbaik/admin/inquiries?status=new");
-    }
-
-    private void GoBlog()
-    {
-        Nav.NavigateTo("/taxbaik/admin/blog");
-    }
-
-    protected override async Task OnInitializedAsync()
-    {
-        if (AuthStateTask != null)
-        {
-            var authState = await AuthStateTask;
-            if (authState.User.Identity?.IsAuthenticated == true)
-            {
-                try
-                {
-                    var summaryTask = DashboardClient.GetSummaryAsync();
-                    var filingsTask = DashboardClient.GetUpcomingFilingsAsync(30);
-
-                    await Task.WhenAll(summaryTask, filingsTask);
-                    summary = await summaryTask;
-                    upcomingFilings = (await filingsTask).ToList();
-                }
-                catch (Exception ex)
-                {
-                    errorMessage = "대시보드 데이터를 불러올 수 없습니다.";
-                    Console.Error.WriteLine($"Dashboard error: {ex.Message}");
-                }
-                finally
-                {
-                    isLoading = false;
-                }
-            }
-            else
-            {
-                // AuthorizeRouteView already gates this page, so this branch is
-                // only a transient auth-state resolution timing gap - but without
-                // resetting isLoading here, AdminDataPanel would spin forever.
-                isLoading = false;
-            }
-        }
-        else
-        {
-            isLoading = false;
-        }
-    }
-
-    private static string GetStatusLabel(string status) => InquiryStatusMapper.Labels.GetValueOrDefault(status, status);
-
-    private static Color StatusColor(string status) => status switch
-    {
-        "new" => Color.Warning,
-        "consulting" => Color.Info,
-        "contracted" => Color.Success,
-        "rejected" => Color.Error,
-        "closed" => Color.Dark,
-        _ => Color.Default
-    };
-}
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Pages/Faqs/FaqEdit.razor b/src/TaxBaik.Web.Client/Components/Admin/Pages/Faqs/FaqEdit.razor
index 598924b..ece5d07 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Pages/Faqs/FaqEdit.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Pages/Faqs/FaqEdit.razor
@@ -1,6 +1,6 @@
 @page "/admin/faqs/create"
 @page "/admin/faqs/{Id:int}/edit"
-@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: true))
+@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 @attribute [Authorize]
 @using TaxBaik.Web.Services
 @inject IFaqBrowserClient FaqClient
@@ -27,14 +27,14 @@
                                   Label="질문 *" Required="true"
                                   RequiredError="질문을 입력하세요."
                                   Counter="300" MaxLength="300"
-                                  Lines="2" AutoGrow="true"
+                                  Lines="2"
                                   Placeholder="예: 기장료가 얼마인지 미리 알 수 있나요?" />
                 </MudItem>
                 <MudItem xs="12">
                     <MudTextField @bind-Value="model.Answer"
                                   Label="답변 *" Required="true"
                                   RequiredError="답변을 입력하세요."
-                                  Lines="5" AutoGrow="true"
+                                  Lines="5"
                                   Placeholder="방문자에게 보여질 답변을 입력하세요." />
                 </MudItem>
                 <MudItem xs="12" md="6">
@@ -117,7 +117,7 @@
 
     private async Task SaveAsync()
     {
-        await form.Validate();
+        await form.ValidateAsync();
         if (!isValid) return;
 
         isSaving = true;
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Pages/Faqs/FaqList.razor b/src/TaxBaik.Web.Client/Components/Admin/Pages/Faqs/FaqList.razor
index 8d2cbcf..902855f 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Pages/Faqs/FaqList.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Pages/Faqs/FaqList.razor
@@ -1,5 +1,5 @@
 @page "/admin/faqs"
-@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: true))
+@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 @attribute [Authorize]
 @using TaxBaik.Web.Services
 @using TaxBaik.Domain.Entities
@@ -58,8 +58,8 @@
                         <td>
                             <div class="d-flex align-center justify-start gap-1">
                                 <MudText Typo="Typo.body2" Class="mr-2">@item.SortOrder</MudText>
-                                <MudIconButton Icon="@Icons.Material.Filled.ArrowDropUp" Size="Size.Small" OnClick="@(() => MoveUpAsync(item))" Style="padding:2px;" Dense="true" />
-                                <MudIconButton Icon="@Icons.Material.Filled.ArrowDropDown" Size="Size.Small" OnClick="@(() => MoveDownAsync(item))" Style="padding:2px;" Dense="true" />
+                                <MudIconButton Icon="@Icons.Material.Filled.ArrowDropUp" Size="Size.Small" OnClick="@(() => MoveUpAsync(item))" Style="padding:2px;" />
+                                <MudIconButton Icon="@Icons.Material.Filled.ArrowDropDown" Size="Size.Small" OnClick="@(() => MoveDownAsync(item))" Style="padding:2px;" />
                             </div>
                         </td>
                         <td>
@@ -70,17 +70,17 @@
                         <td>
                             @if (!string.IsNullOrEmpty(item.Category))
                             {
-                                <MudChip Size="Size.Small" Color="Color.Default">@item.Category</MudChip>
+                                <MudChip T="string" Size="Size.Small" Color="Color.Default">@item.Category</MudChip>
                             }
                         </td>
                         <td>
                             @if (item.IsActive)
                             {
-                                <MudChip Size="Size.Small" Color="Color.Success">노출 중</MudChip>
+                                <MudChip T="string" Size="Size.Small" Color="Color.Success">노출 중</MudChip>
                             }
                             else
                             {
-                                <MudChip Size="Size.Small" Color="Color.Default">비활성</MudChip>
+                                <MudChip T="string" Size="Size.Small" Color="Color.Default">비활성</MudChip>
                             }
                         </td>
                         <td>
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Pages/Inquiries/InquiryCreate.razor b/src/TaxBaik.Web.Client/Components/Admin/Pages/Inquiries/InquiryCreate.razor
index f173fb0..0ec48cb 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Pages/Inquiries/InquiryCreate.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Pages/Inquiries/InquiryCreate.razor
@@ -1,5 +1,5 @@
 @page "/admin/inquiries/create"
-@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: true))
+@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 @attribute [Authorize]
 @using TaxBaik.Application.DTOs
 @using TaxBaik.WasmClient.Components.Admin.Forms
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Pages/Inquiries/InquiryDetail.razor b/src/TaxBaik.Web.Client/Components/Admin/Pages/Inquiries/InquiryDetail.razor
index dc88332..ffdc1f7 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Pages/Inquiries/InquiryDetail.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Pages/Inquiries/InquiryDetail.razor
@@ -1,5 +1,5 @@
 @page "/admin/inquiries/{InquiryId:int}"
-@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: true))
+@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 @attribute [Authorize]
 @using TaxBaik.Application.Services
 @using TaxBaik.Web.Services
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Pages/Inquiries/InquiryEdit.razor b/src/TaxBaik.Web.Client/Components/Admin/Pages/Inquiries/InquiryEdit.razor
index 3737935..3f989c0 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Pages/Inquiries/InquiryEdit.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Pages/Inquiries/InquiryEdit.razor
@@ -1,5 +1,5 @@
 @page "/admin/inquiries/{id:int}/edit"
-@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: true))
+@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 @attribute [Authorize]
 @using TaxBaik.Application.DTOs
 @using TaxBaik.WasmClient.Components.Admin.Forms
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Pages/Inquiries/InquiryList.razor b/src/TaxBaik.Web.Client/Components/Admin/Pages/Inquiries/InquiryList.razor
index 813682d..7aefb00 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Pages/Inquiries/InquiryList.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Pages/Inquiries/InquiryList.razor
@@ -1,5 +1,5 @@
 @page "/admin/inquiries"
-@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: true))
+@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 @attribute [Authorize]
 @using TaxBaik.Application.Services
 @using TaxBaik.Web.Services
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Pages/Logout.razor b/src/TaxBaik.Web.Client/Components/Admin/Pages/Logout.razor
index 96ae213..24b6566 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Pages/Logout.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Pages/Logout.razor
@@ -1,5 +1,5 @@
 @page "/admin/logout"
-@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: true))
+@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 @using TaxBaik.Web.Services
 @inject CustomAuthenticationStateProvider AuthStateProvider
 @inject NavigationManager NavigationManager
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Pages/RevenueTrackings.razor b/src/TaxBaik.Web.Client/Components/Admin/Pages/RevenueTrackings.razor
index 7486550..21537f5 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Pages/RevenueTrackings.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Pages/RevenueTrackings.razor
@@ -1,5 +1,5 @@
 @page "/admin/revenue-trackings"
-@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: true))
+@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 @using TaxBaik.Web.Services.AdminClients
 @using TaxBaik.WasmClient.Components.Admin.Shared
 @inject IRevenueTrackingBrowserClient RevenueClient
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Pages/SeasonSimulator.razor b/src/TaxBaik.Web.Client/Components/Admin/Pages/SeasonSimulator.razor
index 87a2747..31a96f9 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Pages/SeasonSimulator.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Pages/SeasonSimulator.razor
@@ -1,5 +1,5 @@
 @page "/admin/season-simulator"
-@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: true))
+@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 @attribute [Authorize]
 @using TaxBaik.Application.Seasonal
 @using TaxBaik.Application.Services
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Pages/Settings/SiteSettings.razor b/src/TaxBaik.Web.Client/Components/Admin/Pages/Settings/SiteSettings.razor
index bb01ce3..dda7c2b 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Pages/Settings/SiteSettings.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Pages/Settings/SiteSettings.razor
@@ -1,5 +1,5 @@
 @page "/admin/settings"
-@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: true))
+@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 @attribute [Authorize]
 @using System.Collections.Generic
 @using TaxBaik.Web.Services
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Pages/TaxFilingSchedules.razor b/src/TaxBaik.Web.Client/Components/Admin/Pages/TaxFilingSchedules.razor
index 1509df4..623aeec 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Pages/TaxFilingSchedules.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Pages/TaxFilingSchedules.razor
@@ -1,5 +1,5 @@
 @page "/admin/tax-filing-schedules"
-@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: true))
+@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 @using TaxBaik.Web.Services.AdminClients
 @using TaxBaik.Domain.Entities
 @using TaxBaik.WasmClient.Components.Admin.Shared
@@ -227,7 +227,7 @@ else
     {
         if (form != null)
         {
-            await form.Validate();
+            await form.ValidateAsync();
             if (!form.IsValid)
             {
                 Snackbar.Add("필수 항목을 입력해주세요.", Severity.Warning);
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Pages/TaxFilings/TaxFilingList.razor b/src/TaxBaik.Web.Client/Components/Admin/Pages/TaxFilings/TaxFilingList.razor
index 86f6400..ca3c09f 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Pages/TaxFilings/TaxFilingList.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Pages/TaxFilings/TaxFilingList.razor
@@ -1,5 +1,5 @@
 @page "/admin/tax-filings"
-@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: true))
+@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 @attribute [Authorize]
 @using TaxBaik.Web.Services
 @using TaxBaik.Domain.Entities
@@ -98,7 +98,7 @@
         }
     }
 
-    private async Task<IEnumerable<Client>> SearchClients(string value)
+    private async Task<IEnumerable<Client>> SearchClients(string value, CancellationToken cancellationToken)
     {
         try
         {
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Pages/TaxProfiles.razor b/src/TaxBaik.Web.Client/Components/Admin/Pages/TaxProfiles.razor
index 2b52a20..eae652d 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Pages/TaxProfiles.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Pages/TaxProfiles.razor
@@ -1,5 +1,5 @@
 @page "/admin/tax-profiles"
-@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: true))
+@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 @using System.ComponentModel.DataAnnotations
 @using TaxBaik.Web.Services.AdminClients
 @using TaxBaik.WasmClient.Components.Admin.Shared
@@ -202,7 +202,7 @@ else
     {
         if (form != null)
         {
-            await form.Validate();
+            await form.ValidateAsync();
             if (!form.IsValid)
             {
                 Snackbar.Add("고객을 선택하세요.", Severity.Warning);
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Routes.razor b/src/TaxBaik.Web.Client/Components/Admin/Routes.razor
index 4fd64d9..34ca1b5 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Routes.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Routes.razor
@@ -3,11 +3,7 @@
 
 <Router AppAssembly="@typeof(TaxBaik.WasmClient.Components.Admin.Pages.AdminIndex).Assembly">
     <Found Context="routeData">
-        <AuthorizeRouteView RouteData="@routeData" DefaultLayout="@typeof(TaxBaik.WasmClient.Components.Admin.Layout.MainLayout)">
-            <NotAuthorized>
-                <RedirectToLogin />
-            </NotAuthorized>
-        </AuthorizeRouteView>
+        <RouteView RouteData="@routeData" DefaultLayout="@typeof(TaxBaik.WasmClient.Components.Admin.Layout.MainLayout)" />
         <FocusOnNavigate RouteData="@routeData" Selector="h1" />
     </Found>
     <NotFound>
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Services/ILocalStorageService.cs b/src/TaxBaik.Web.Client/Components/Admin/Services/ILocalStorageService.cs
index e172ac9..3f01b31 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Services/ILocalStorageService.cs
+++ b/src/TaxBaik.Web.Client/Components/Admin/Services/ILocalStorageService.cs
@@ -5,4 +5,5 @@ public interface ILocalStorageService
     Task<string?> GetItemAsStringAsync(string key);
     Task SetItemAsStringAsync(string key, string value);
     Task RemoveItemAsync(string key);
+    Task ClearAuthAsync();
 }
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Services/LocalStorageService.cs b/src/TaxBaik.Web.Client/Components/Admin/Services/LocalStorageService.cs
index 4824801..7a46a9c 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Services/LocalStorageService.cs
+++ b/src/TaxBaik.Web.Client/Components/Admin/Services/LocalStorageService.cs
@@ -15,7 +15,7 @@ public class LocalStorageService : ILocalStorageService
     {
         try
         {
-            return await _jsRuntime.InvokeAsync<string>("localStorage.getItem", key);
+            return await _jsRuntime.InvokeAsync<string>("taxbaikAdminSession.getLocalStorageItem", key);
         }
         catch
         {
@@ -27,7 +27,7 @@ public class LocalStorageService : ILocalStorageService
     {
         try
         {
-            await _jsRuntime.InvokeVoidAsync("localStorage.setItem", key, value);
+            await _jsRuntime.InvokeVoidAsync("taxbaikAdminSession.setLocalStorageItem", key, value);
         }
         catch { }
     }
@@ -36,7 +36,20 @@ public class LocalStorageService : ILocalStorageService
     {
         try
         {
-            await _jsRuntime.InvokeVoidAsync("localStorage.removeItem", key);
+            await _jsRuntime.InvokeVoidAsync("taxbaikAdminSession.removeLocalStorageItem", key);
+        }
+        catch { }
+    }
+
+    public async Task ClearAuthAsync()
+    {
+        try
+        {
+            await RemoveItemAsync("accessToken");
+            await RemoveItemAsync("refreshToken");
+            await RemoveItemAsync("tokenExpiry");
+            await RemoveItemAsync("auth_token");
+            await RemoveItemAsync("admin-remembered-username");
         }
         catch { }
     }
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Services/MudDialogServiceCompatExtensions.cs b/src/TaxBaik.Web.Client/Components/Admin/Services/MudDialogServiceCompatExtensions.cs
new file mode 100644
index 0000000..251bfbb
--- /dev/null
+++ b/src/TaxBaik.Web.Client/Components/Admin/Services/MudDialogServiceCompatExtensions.cs
@@ -0,0 +1,24 @@
+using TaxBaik.WasmClient.Components.Admin.Shared;
+
+namespace MudBlazor;
+
+public static class MudDialogServiceCompatExtensions
+{
+    public static async Task<bool?> ShowMessageBox(
+        this IDialogService dialogService,
+        string title,
+        string message,
+        string yesText = "확인",
+        string? cancelText = null)
+    {
+        var parameters = new DialogParameters
+        {
+            { "Title", title },
+            { "Message", message }
+        };
+
+        var dialog = await dialogService.ShowAsync<ConfirmDialog>(title, parameters);
+        var result = await dialog.Result;
+        return result?.Canceled == false ? true : false;
+    }
+}
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Shared/AdminShell.razor b/src/TaxBaik.Web.Client/Components/Admin/Shared/AdminShell.razor
index 706e354..8629e99 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Shared/AdminShell.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Shared/AdminShell.razor
@@ -1,5 +1,4 @@
 @inject NavigationManager Navigation
-@inject IJSRuntime JS
 @implements IDisposable
 
 <div class="admin-shell">
@@ -89,14 +88,6 @@
         if (firstRender && !firstRenderCompleted)
         {
             firstRenderCompleted = true;
-            try
-            {
-                await JS.InvokeVoidAsync("taxbaikAdminSession.hideLoading");
-            }
-            catch
-            {
-                // Keep rendering even if the loading overlay helper is unavailable.
-            }
         }
     }
 
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Shared/CommonCodeListPanel.razor b/src/TaxBaik.Web.Client/Components/Admin/Shared/CommonCodeListPanel.razor
index ca302c7..0e66f49 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Shared/CommonCodeListPanel.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Shared/CommonCodeListPanel.razor
@@ -31,7 +31,7 @@
             <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>
+            <MudSwitch T="bool" @bind-Value="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>
                 <MudButton Variant="Variant.Outlined" OnClick="OnResetRequested">초기화</MudButton>
diff --git a/src/TaxBaik.Web.Client/Components/Admin/Shared/ConfirmDialog.razor b/src/TaxBaik.Web.Client/Components/Admin/Shared/ConfirmDialog.razor
index 4bb568d..e58bec8 100644
--- a/src/TaxBaik.Web.Client/Components/Admin/Shared/ConfirmDialog.razor
+++ b/src/TaxBaik.Web.Client/Components/Admin/Shared/ConfirmDialog.razor
@@ -11,7 +11,7 @@
 </MudDialog>
 
 @code {
-    [CascadingParameter] MudDialogInstance MudDialog { get; set; } = null!;
+    [CascadingParameter] IMudDialogInstance MudDialog { get; set; } = null!;
     [Parameter] public string Title { get; set; } = "";
     [Parameter] public string Message { get; set; } = "";
 
diff --git a/src/TaxBaik.Web.Client/Services/CustomAuthenticationStateProvider.cs b/src/TaxBaik.Web.Client/Services/CustomAuthenticationStateProvider.cs
index fe84f4c..9c165cf 100644
--- a/src/TaxBaik.Web.Client/Services/CustomAuthenticationStateProvider.cs
+++ b/src/TaxBaik.Web.Client/Services/CustomAuthenticationStateProvider.cs
@@ -153,7 +153,6 @@ public class CustomAuthenticationStateProvider : AuthenticationStateProvider
     {
         // TokenStore 초기화
         _tokenStore.Clear();
-
         NotifyAuthenticationStateChanged(GetAuthenticationStateAsync());
     }
 
diff --git a/src/TaxBaik.Web.Client/Services/ILocalStorageService.cs b/src/TaxBaik.Web.Client/Services/ILocalStorageService.cs
index 57d9054..1b02909 100644
--- a/src/TaxBaik.Web.Client/Services/ILocalStorageService.cs
+++ b/src/TaxBaik.Web.Client/Services/ILocalStorageService.cs
@@ -5,4 +5,5 @@ public interface ILocalStorageService
     Task<string?> GetItemAsStringAsync(string key);
     Task SetItemAsStringAsync(string key, string value);
     Task RemoveItemAsync(string key);
+    Task ClearAuthAsync();
 }
diff --git a/src/TaxBaik.Web.Client/Services/LocalStorageService.cs b/src/TaxBaik.Web.Client/Services/LocalStorageService.cs
index 628e239..12f2739 100644
--- a/src/TaxBaik.Web.Client/Services/LocalStorageService.cs
+++ b/src/TaxBaik.Web.Client/Services/LocalStorageService.cs
@@ -15,7 +15,7 @@ public class LocalStorageService : ILocalStorageService
     {
         try
         {
-            return await _jsRuntime.InvokeAsync<string>("localStorage.getItem", key);
+            return await _jsRuntime.InvokeAsync<string>("taxbaikAdminSession.getLocalStorageItem", key);
         }
         catch
         {
@@ -27,7 +27,7 @@ public class LocalStorageService : ILocalStorageService
     {
         try
         {
-            await _jsRuntime.InvokeVoidAsync("localStorage.setItem", key, value);
+            await _jsRuntime.InvokeVoidAsync("taxbaikAdminSession.setLocalStorageItem", key, value);
         }
         catch { }
     }
@@ -36,7 +36,20 @@ public class LocalStorageService : ILocalStorageService
     {
         try
         {
-            await _jsRuntime.InvokeVoidAsync("localStorage.removeItem", key);
+            await _jsRuntime.InvokeVoidAsync("taxbaikAdminSession.removeLocalStorageItem", key);
+        }
+        catch { }
+    }
+
+    public async Task ClearAuthAsync()
+    {
+        try
+        {
+            await RemoveItemAsync("accessToken");
+            await RemoveItemAsync("refreshToken");
+            await RemoveItemAsync("tokenExpiry");
+            await RemoveItemAsync("auth_token");
+            await RemoveItemAsync("admin-remembered-username");
         }
         catch { }
     }
diff --git a/src/TaxBaik.Web.Client/TaxBaik.Web.Client.csproj b/src/TaxBaik.Web.Client/TaxBaik.Web.Client.csproj
index d66e93d..464d43f 100644
--- a/src/TaxBaik.Web.Client/TaxBaik.Web.Client.csproj
+++ b/src/TaxBaik.Web.Client/TaxBaik.Web.Client.csproj
@@ -9,6 +9,8 @@
     <StaticWebAssetBasePath>admin</StaticWebAssetBasePath>
     <StaticWebAssetFingerprintingEnabled>false</StaticWebAssetFingerprintingEnabled>
     <StaticWebAssetsFingerprintContent>false</StaticWebAssetsFingerprintContent>
+    <DebugType>none</DebugType>
+    <DebugSymbols>false</DebugSymbols>
   </PropertyGroup>
 
   <ItemGroup>
@@ -21,7 +23,7 @@
     <PackageReference Include="Microsoft.AspNetCore.Components.Authorization" Version="10.0.9" />
     <PackageReference Include="Microsoft.Extensions.Http" Version="10.0.9" />
     <PackageReference Include="Microsoft.IdentityModel.Tokens" Version="8.19.1" />
-    <PackageReference Include="MudBlazor" Version="6.10.0" />
+    <PackageReference Include="MudBlazor" Version="9.6.0" />
     <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="8.19.1" />
   </ItemGroup>
 
diff --git a/src/TaxBaik.Web/TaxBaik.Web.csproj b/src/TaxBaik.Web/TaxBaik.Web.csproj
index fb5aa25..641439f 100644
--- a/src/TaxBaik.Web/TaxBaik.Web.csproj
+++ b/src/TaxBaik.Web/TaxBaik.Web.csproj
@@ -27,7 +27,7 @@
   <ItemGroup>
     <PackageReference Include="FastEndpoints" Version="5.30.0" />
     <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.Server" Version="10.0.9" />
-    <PackageReference Include="MudBlazor" Version="6.10.0" />
+    <PackageReference Include="MudBlazor" Version="9.6.0" />
     <PackageReference Include="BCrypt.Net-Next" Version="4.0.3" />
     <PackageReference Include="Microsoft.AspNetCore.Authentication.Google" Version="10.0.9" />
     <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="8.19.1" />
diff --git a/tests/e2e/admin-login.spec.ts b/tests/e2e/admin-login.spec.ts
index 8e72e67..270d597 100644
--- a/tests/e2e/admin-login.spec.ts
+++ b/tests/e2e/admin-login.spec.ts
@@ -26,14 +26,14 @@ test.describe('admin authentication', () => {
     });
 
     await page.goto(`${baseUrl}/admin/login`);
-    await expect(page.locator('input[placeholder="사용자명"]')).toBeVisible();
-    await expect(page.locator('input[placeholder="비밀번호"]')).toBeVisible();
+    await expect(page.locator('#Username')).toBeVisible();
+    await expect(page.locator('#Password')).toBeVisible();
 
     // Wait for form to be fully ready
     await page.waitForTimeout(500);
 
-    const usernameInput = page.locator('input[placeholder="사용자명"]');
-    const passwordInput = page.locator('input[placeholder="비밀번호"]');
+    const usernameInput = page.locator('#Username');
+    const passwordInput = page.locator('#Password');
     const loginButton = page.getByRole('button', { name: '로그인' });
 
     await usernameInput.fill(username);
@@ -74,7 +74,8 @@ test.describe('admin authentication', () => {
 
     await expect(page).toHaveURL(/\/taxbaik\/admin\/dashboard$/, { timeout: 20_000 });
     // WASM 부팅에 시간이 걸릴 수 있으므로 더 긴 타임아웃 사용
-    await expect(page.getByRole('heading', { name: '대시보드' }).first()).toBeVisible({ timeout: 60_000 });
+    await expect(page.locator('.admin-page-hero')).toBeVisible({ timeout: 60_000 });
+    await expect(page.locator('.admin-page-hero')).toContainText('대시보드');
     await expect(page.getByRole('link', { name: /로그아웃/ })).toBeVisible({ timeout: 30_000 });
     expect(consoleErrors, 'browser console/page errors').toEqual([]);
   });