style: Fix search form height - add min-height: auto override

Search form card-body inherits min-height: calc(100vh - 140px) from .admin-content-card .card-body, causing it to occupy full screen. Add inline min-height: auto to override and allow natural height for search forms only.

Affected pages: Blog, Clients, Inquiries

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

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

@@ -8,7 +8,7 @@
     @await Html.PartialAsync("_AdminPageHeader", new TaxBaik.Web.Models.AdminPageHeaderModel("콘텐츠", "블로그 관리", "검색, 발행 상태, 작성일 기준의 블로그 목록입니다.", "/admin/blog/create", "새 글 작성"))
 
     <div class="card">
-        <div class="card-body p-2">
+        <div class="card-body p-2" style="min-height: auto;">
             <form method="get">
                 <div class="row g-2 align-items-end">
                     <div class="col-md-4">

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

@@ -8,7 +8,7 @@
     @await Html.PartialAsync("_AdminPageHeader", new TaxBaik.Web.Models.AdminPageHeaderModel("고객 관리", "고객 목록", "검색, 상태 필터, 페이지네이션 기준의 고객 목록입니다.", "/admin/clients/create", "고객 등록"))
 
     <div class="card">
-        <div class="card-body p-2">
+        <div class="card-body p-2" style="min-height: auto;">
             <form method="get">
                 <div class="row g-2 align-items-end">
                     <div class="col-md-4">

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

@@ -5,7 +5,7 @@
 <section class="admin-page-shell">
     @await Html.PartialAsync("_AdminPageHeader", new TaxBaik.Web.Models.AdminPageHeaderModel("Customer Requests", "문의 관리", "상담 요청을 상태별로 확인합니다.", "/admin/inquiries/create", "문의 등록"))
     <div class="card">
-        <div class="card-body p-2">
+        <div class="card-body p-2" style="min-height: auto;">
             <form method="get">
                 <div class="row g-2 align-items-end">
                     <div class="col-md-3">