refactor: fully integrate Browser Client into main Web server

BREAKING CHANGE: Removed TaxBaik.Web.Client project (separate WASM app)

Changes:
- Migrated all Blazor components to TaxBaik.Web/Components/Admin
- Migrated all Browser Client services to Components/Admin/Services
- Updated Program.cs to use integrated components (same assembly)
- Removed AddAdditionalAssemblies (no longer needed)
- Updated _Imports.razor with correct namespaces

Architecture:
✅ API-First: REST endpoints in TaxBaik.Web (ASP.NET Core)
✅ Client-Side: Blazor WASM components in TaxBaik.Web/Components
✅ Unified: Both API and UI served from single web server
✅ No separation: No separate client project

Result:
- Single deploy unit (TaxBaik.Web)
- API served only from web server
- Blazor renders client-side (prerender: false for protected pages)
- Monolithic web app architecture

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

src/TaxBaik.Web.Client/Components/Admin/Pages/Blog/BlogEdit.razor

@@ -1,155 +0,0 @@
-@page "/admin/blog/{id:int}/edit"
-@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
-@attribute [Authorize]
-@using TaxBaik.Application.DTOs
-@using TaxBaik.WasmClient.Components.Admin.Pages.Blog
-@inject IBlogBrowserClient BlogClient
-@inject ICategoryBrowserClient CategoryClient
-@inject NavigationManager Navigation
-@inject ISnackbar Snackbar
-@inject IDialogService DialogService
-
-<PageTitle>포스트 수정</PageTitle>
-
-<AdminCrudPageShell Title="포스트 수정"
-                    Eyebrow="Content"
-                    Subtitle="블로그 포스트를 수정합니다."
-                    Loading="@isLoading"
-                    SkeletonContent="@EditorSkeleton"
-                    OnCancel="@GoBack">
-    @if (post == null)
-{
-    <MudAlert Severity="Severity.Error" Class="mt-4">포스트를 찾을 수 없습니다.</MudAlert>
-}
-else
-{
-    <MudPaper Class="pa-4 mt-4" Elevation="1">
-        <BlogForm Model="model" Categories="categories" SubmitText="저장" OnSubmit="SavePost" />
-        <div class="mt-4">
-            <MudButton Variant="Variant.Outlined" Color="Color.Error" @onclick="DeletePost">삭제</MudButton>
-        </div>
-    </MudPaper>
-}
-</AdminCrudPageShell>
-
-@code {
-    [Parameter]
-    public int Id { get; set; }
-
-    private TaxBaik.Application.DTOs.BlogPostResponseDto? post;
-    private IReadOnlyList<Domain.Entities.Category> categories = [];
-    private BlogForm.BlogFormModel model = new();
-    private bool isLoading = true;
-
-    private RenderFragment EditorSkeleton => builder =>
-    {
-        builder.OpenComponent<AdminSkeletonRows>(0);
-        builder.AddAttribute(1, "Rows", 5);
-        builder.AddAttribute(2, "Columns", 3);
-        builder.CloseComponent();
-    };
-
-    protected override async Task OnInitializedAsync()
-    {
-        try
-        {
-            post = await BlogClient.GetByIdAsync(Id);
-            if (post != null)
-            {
-                categories = await CategoryClient.GetAllAsync();
-                MapPostToModel(post);
-            }
-        }
-        catch (Exception ex)
-        {
-            Snackbar.Add($"포스트 로드 실패: {ex.Message}", Severity.Error);
-        }
-        finally
-        {
-            isLoading = false;
-        }
-    }
-
-    private void MapPostToModel(TaxBaik.Application.DTOs.BlogPostResponseDto post)
-    {
-        model.Title = post.Title;
-        model.Content = post.Content;
-        model.CategoryId = post.CategoryId;
-        model.Tags = post.Tags;
-        model.SeoTitle = post.SeoTitle;
-        model.SeoDescription = post.SeoDescription;
-        model.IsPublished = post.IsPublished;
-    }
-
-    private void GoBack()
-    {
-        Navigation.NavigateTo("/taxbaik/admin/blog");
-    }
-
-    private async Task SavePost()
-    {
-        if (post == null)
-            return;
-
-        try
-        {
-            var result = await BlogClient.UpdateAsync(post.Id, new CreateBlogPostDto
-            {
-                Title = model.Title,
-                Content = model.Content,
-                CategoryId = model.CategoryId,
-                Tags = model.Tags,
-                SeoTitle = model.SeoTitle,
-                SeoDescription = model.SeoDescription,
-                IsPublished = model.IsPublished
-            });
-
-            if (result == null)
-            {
-                Snackbar.Add("저장 실패: 포스트를 저장하지 못했습니다.", Severity.Error);
-                return;
-            }
-
-            Snackbar.Add("포스트가 저장되었습니다.", Severity.Success);
-            Navigation.NavigateTo("/taxbaik/admin/blog");
-        }
-        catch (ValidationException ex)
-        {
-            Snackbar.Add(ex.Message, Severity.Error);
-        }
-        catch (Exception ex)
-        {
-            Snackbar.Add($"저장 실패: {ex.Message}", Severity.Error);
-        }
-    }
-
-    private async Task DeletePost()
-    {
-        if (post == null)
-            return;
-
-        var result = await DialogService.ShowMessageBox(
-            "포스트 삭제",
-            "정말 삭제하시겠습니까? 이 작업은 취소할 수 없습니다.",
-            "삭제", "취소");
-
-        if (result != true)
-            return;
-
-        try
-        {
-            var deleted = await BlogClient.DeleteAsync(post.Id);
-            if (!deleted)
-            {
-                Snackbar.Add("삭제 실패: 포스트를 삭제하지 못했습니다.", Severity.Error);
-                return;
-            }
-            Snackbar.Add("포스트가 삭제되었습니다.", Severity.Success);
-            Navigation.NavigateTo("/taxbaik/admin/blog");
-        }
-        catch (Exception ex)
-        {
-            Snackbar.Add($"삭제 실패: {ex.Message}", Severity.Error);
-        }
-    }
-}