feat: harden auth ops and deployment baseline

TaxBaik.Web/Components/Admin/Pages/Blog/BlogCreate.razor

@@ -1,11 +1,12 @@
 @page "/admin/blog/create"
+@using TaxBaik.Application.DTOs
 @using TaxBaik.Application.Services
 @using TaxBaik.Domain.Interfaces
 @attribute [Authorize]
 @inject BlogService BlogService
 @inject ICategoryRepository CategoryRepository
 @inject NavigationManager Navigation
-@inject Snackbar Snackbar
+@inject ISnackbar Snackbar
 
 <PageTitle>새 포스트 작성</PageTitle>
 
@@ -49,7 +50,7 @@
 </MudPaper>
 
 @code {
-    private MudForm form;
+    private MudForm? form;
     private List<Domain.Entities.Category> categories = [];
     private CreatePostModel model = new();
 
@@ -60,18 +61,43 @@
 
     private async Task SavePost()
     {
-        // TODO: Implement BlogService.CreateAsync
-        Navigation.NavigateTo("/taxbaik/admin/blog");
+        if (form == null)
+            return;
+
+        await form.Validate();
+        if (!form.IsValid)
+            return;
+
+        try
+        {
+            await BlogService.CreateAsync(new CreateBlogPostDto
+            {
+                Title = model.Title,
+                Content = model.Content,
+                CategoryId = model.CategoryId,
+                Tags = model.Tags,
+                SeoTitle = model.SeoTitle,
+                SeoDescription = model.SeoDescription,
+                IsPublished = model.IsPublished
+            });
+
+            Snackbar.Add("포스트가 저장되었습니다.", Severity.Success);
+            Navigation.NavigateTo("/taxbaik/admin/blog");
+        }
+        catch (ValidationException ex)
+        {
+            Snackbar.Add(ex.Message, Severity.Error);
+        }
     }
 
     private class CreatePostModel
     {
-        public string Title { get; set; }
-        public string Content { get; set; }
-        public int CategoryId { get; set; }
-        public string Tags { get; set; }
-        public string SeoTitle { get; set; }
-        public string SeoDescription { get; set; }
+        public string Title { get; set; } = "";
+        public string Content { get; set; } = "";
+        public int? CategoryId { get; set; }
+        public string? Tags { get; set; }
+        public string? SeoTitle { get; set; }
+        public string? SeoDescription { get; set; }
         public bool IsPublished { get; set; }
     }
 }