feat: 블로그 시즌 연동 — 홈페이지 세무 정보 섹션 시즌화

- TaxSeason / CurrentSeasonDto에 RelatedCategorySlug 추가
- TaxSeasonCalendar 각 시즌에 카테고리 슬러그 매핑
  (income-tax→income-tax, vat-1st/2nd→vat, 종부세→real-estate-tax 등)
- IBlogPostRepository.GetByCategorySlugAsync 추가
- BlogService.GetSeasonalPostsAsync: 시즌 관련 글 2개 우선 + 나머지 최신 글로 채움
- IndexModel: SeasonalPosts / RecentPosts 분리 로드
- Index.cshtml 블로그 섹션: 시즌 중 "이번 시즌 추천" 배지 + 시즌별 전체보기 버튼
- site.css: blog-card--seasonal, seasonal-blog-tag, btn-seasonal 스타일

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

TaxBaik.Web/Pages/Index.cshtml

@@ -273,33 +273,79 @@ else
     </div>
 </section>
 
-<!-- 최근 블로그 -->
+<!-- 세무 정보 블로그 -->
 <section class="py-5">
     <div class="container">
         <div class="text-center mb-5">
-            <h2 class="section-title">세무 정보</h2>
-            <p class="text-muted">최신 세법 변화와 실무 팁을 공유합니다</p>
+            @if (season != null)
+            {
+                <div class="seasonal-blog-header mb-2">
+                    <span class="seasonal-blog-tag">📅 @season.Name 시즌</span>
+                </div>
+                <h2 class="section-title">이번 시즌 세무 정보</h2>
+                <p class="text-muted">@season.Name 관련 절세 팁과 신고 가이드를 확인하세요</p>
+            }
+            else
+            {
+                <h2 class="section-title">세무 정보</h2>
+                <p class="text-muted">최신 세법 변화와 실무 팁을 공유합니다</p>
+            }
         </div>
 
-        @if (Model.RecentPosts?.Count > 0)
+        @{
+            var hasSeasonalPosts = Model.SeasonalPosts?.Count > 0;
+            var hasRecentPosts = Model.RecentPosts?.Count > 0;
+        }
+
+        @if (hasSeasonalPosts || hasRecentPosts)
         {
             <div class="row g-4">
-                @foreach (var post in Model.RecentPosts.Take(3))
+                @* 시즌 관련 글 (배지 강조) *@
+                @if (hasSeasonalPosts)
                 {
-                    <div class="col-lg-4 col-md-6">
-                        <div class="card blog-card h-100">
-                            <div class="blog-placeholder">📝</div>
-                            <div class="card-body">
-                                <small class="badge bg-primary-badge">@post.CategoryName</small>
-                                <h4 class="card-title mt-3">@post.Title</h4>
-                                <p class="text-muted small">@post.CreatedAt.ToString("yyyy년 MM월 dd일")</p>
-                                <a href="/taxbaik/blog/@post.Slug" class="btn btn-sm btn-primary">글 내용 보기</a>
+                    @foreach (var post in Model.SeasonalPosts!)
+                    {
+                        <div class="col-lg-4 col-md-6">
+                            <div class="card blog-card h-100 blog-card--seasonal">
+                                <div class="blog-seasonal-ribbon">이번 시즌 추천</div>
+                                <div class="blog-placeholder">🗓️</div>
+                                <div class="card-body">
+                                    <small class="badge bg-season-badge">@post.CategoryName</small>
+                                    <h4 class="card-title mt-3">@post.Title</h4>
+                                    <p class="text-muted small">@((post.PublishedAt ?? post.CreatedAt).ToString("yyyy년 MM월 dd일"))</p>
+                                    <a href="/taxbaik/blog/@post.Slug" class="btn btn-sm btn-seasonal">자세히 보기</a>
+                                </div>
                             </div>
                         </div>
-                    </div>
+                    }
+                }
+                @* 최신 글 (나머지 채우기) *@
+                @if (hasRecentPosts)
+                {
+                    @foreach (var post in Model.RecentPosts!)
+                    {
+                        <div class="col-lg-4 col-md-6">
+                            <div class="card blog-card h-100">
+                                <div class="blog-placeholder">📝</div>
+                                <div class="card-body">
+                                    <small class="badge bg-primary-badge">@post.CategoryName</small>
+                                    <h4 class="card-title mt-3">@post.Title</h4>
+                                    <p class="text-muted small">@((post.PublishedAt ?? post.CreatedAt).ToString("yyyy년 MM월 dd일"))</p>
+                                    <a href="/taxbaik/blog/@post.Slug" class="btn btn-sm btn-primary">글 내용 보기</a>
+                                </div>
+                            </div>
+                        </div>
+                    }
                 }
             </div>
-            <div class="text-center mt-5">
+
+            <div class="text-center mt-5 d-flex justify-content-center gap-3 flex-wrap">
+                @if (season != null && !string.IsNullOrEmpty(season.RelatedCategorySlug))
+                {
+                    <a href="/taxbaik/blog?category=@season.RelatedCategorySlug" class="btn btn-outline-seasonal btn-lg">
+                        📅 @season.Name 전체 글 보기
+                    </a>
+                }
                 <a href="/taxbaik/blog" class="btn btn-outline-primary btn-lg">전체 블로그 보기</a>
             </div>
         }

TaxBaik.Web/Pages/Index.cshtml.cs

@@ -12,6 +12,7 @@ public class IndexModel : PageModel
     private readonly AnnouncementService _announcementService;
 
     public List<BlogPost> RecentPosts { get; set; } = [];
+    public List<BlogPost> SeasonalPosts { get; set; } = [];
     public CurrentSeasonDto? CurrentSeason { get; set; }
     public List<Announcement> ActiveAnnouncements { get; set; } = [];
 
@@ -40,12 +41,23 @@ public class IndexModel : PageModel
 
         try
         {
-            var (posts, _) = await _blogService.GetPublishedPagedAsync(1, 3);
-            RecentPosts = posts.ToList();
+            if (CurrentSeason is not null && !string.IsNullOrEmpty(CurrentSeason.RelatedCategorySlug))
+            {
+                var (seasonal, latest) = await _blogService.GetSeasonalPostsAsync(
+                    CurrentSeason.RelatedCategorySlug, seasonalCount: 2, totalCount: 3);
+                SeasonalPosts = seasonal.ToList();
+                RecentPosts = latest.ToList();
+            }
+            else
+            {
+                var (posts, _) = await _blogService.GetPublishedPagedAsync(1, 3);
+                RecentPosts = posts.ToList();
+            }
         }
         catch
         {
             RecentPosts = [];
+            SeasonalPosts = [];
         }
     }
 }

TaxBaik.Web/wwwroot/css/site.css

@@ -641,3 +641,65 @@ img {
     white-space: nowrap;
     letter-spacing: 0.5px;
 }
+
+/* ===== 블로그 시즌 연동 ===== */
+.seasonal-blog-header {
+    display: flex;
+    justify-content: center;
+}
+.seasonal-blog-tag {
+    display: inline-block;
+    background: linear-gradient(135deg, #C62828 0%, #B71C1C 100%);
+    color: white;
+    font-size: 0.82rem;
+    font-weight: 700;
+    padding: 4px 16px;
+    border-radius: 20px;
+    letter-spacing: 0.5px;
+}
+
+.blog-card--seasonal {
+    border: 2px solid var(--color-primary) !important;
+    position: relative;
+    overflow: visible;
+}
+.blog-seasonal-ribbon {
+    position: absolute;
+    top: -12px;
+    left: 50%;
+    transform: translateX(-50%);
+    background: var(--color-primary);
+    color: white;
+    font-size: 0.75rem;
+    font-weight: 700;
+    padding: 3px 14px;
+    border-radius: 20px;
+    white-space: nowrap;
+    letter-spacing: 0.5px;
+    z-index: 1;
+}
+
+.bg-season-badge {
+    background-color: var(--color-primary) !important;
+    color: white !important;
+}
+
+.btn-seasonal {
+    background-color: var(--color-primary);
+    color: white;
+    border: none;
+}
+.btn-seasonal:hover {
+    background-color: var(--color-primary-dark);
+    color: white;
+}
+
+.btn-outline-seasonal {
+    border: 2px solid var(--color-primary);
+    color: var(--color-primary);
+    background: transparent;
+}
+.btn-outline-seasonal:hover {
+    background-color: var(--color-primary);
+    color: white;
+}