style: Remove hr separators, use CSS borders for compact spacing

Replace <hr class="my-0" /> with <div class="table-responsive" style="border-top: 1px solid var(--border-color-light);"> across all search+table pages (Blog, Clients, Inquiries). This eliminates the large gap created by hr element's default margin, achieving Tabler demo-level density.

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

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

@@ -29,8 +29,7 @@
         </div>
         @if (Model.Items.Count > 0)
         {
-            <hr class="my-0" />
+            <div class="table-responsive" style="border-top: 1px solid var(--border-color-light);">
-            <div class="table-responsive">
                 <table class="table table-vcenter card-table table-hover">
                     <thead>
                         <tr>

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

@@ -42,8 +42,7 @@
         </div>
         @if (Model.Items.Count > 0)
         {
-            <hr class="my-0" />
+            <div class="table-responsive" style="border-top: 1px solid var(--border-color-light);">
-            <div class="table-responsive">
                 <table class="table table-vcenter card-table table-hover">
                     <thead>
                         <tr>

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

@@ -20,8 +20,7 @@
         </div>
         @if (Model.Items.Count > 0)
         {
-            <hr class="my-0" />
+            <div class="table-responsive" style="border-top: 1px solid var(--border-color-light);">
-            <div class="table-responsive">
                 <table class="table table-vcenter card-table table-hover">
                     <thead>
                         <tr>