style: Standardize empty state card-body padding to p-2

Add p-2 padding to card-body elements in empty state blocks across all admin pages (Announcements, FAQs, TaxProfiles, Companies) for consistent spacing and compact layout.

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

src/TaxBaik.Web/Pages/Admin/Announcements/Index.cshtml

@@ -7,7 +7,7 @@
     @if (Model.Items.Count == 0)
     {
         <div class="card">
-            <div class="card-body">
+            <div class="card-body p-2">
                 @await Html.PartialAsync("_EmptyState", "공지사항이 없습니다.")
             </div>
         </div>

src/TaxBaik.Web/Pages/Admin/Companies/Index.cshtml

@@ -7,7 +7,7 @@
     @if (Model.Items.Count == 0)
     {
         <div class="card">
-            <div class="card-body">
+            <div class="card-body p-2">
                 @await Html.PartialAsync("_EmptyState", "회사가 없습니다.")
             </div>
         </div>

src/TaxBaik.Web/Pages/Admin/Faqs/Index.cshtml

@@ -7,7 +7,7 @@
     @if (Model.Items.Count == 0)
     {
         <div class="card">
-            <div class="card-body">
+            <div class="card-body p-2">
                 @await Html.PartialAsync("_EmptyState", "FAQ가 없습니다.")
             </div>
         </div>

src/TaxBaik.Web/Pages/Admin/TaxProfiles/Index.cshtml

@@ -7,7 +7,7 @@
     @if (Model.Items.Count == 0)
     {
         <div class="card">
-            <div class="card-body">
+            <div class="card-body p-2">
                 @await Html.PartialAsync("_EmptyState", "세무 프로필이 없습니다.")
             </div>
         </div>