style: perfectly align title, description, and search controls in a single row

- Use flex-row and items-baseline to seamlessly integrate the title and description.
- Remove input labels to streamline the search bar vertically.
- Apply mr-auto to the title group to push the search controls exactly to the right while keeping everything on the same horizontal baseline.

adminfront/src/features/tenants/routes/TenantListPage.tsx

@@ -474,35 +474,30 @@ function TenantListPage() {
       </header>
 
       <Card className="bg-[var(--color-panel)] flex-1 flex flex-col min-h-0 overflow-hidden">
-        <CardHeader className="flex flex-wrap items-end gap-8 flex-shrink-0">
-          <div>
-            <CardTitle>
+        <CardHeader className="flex flex-row items-center gap-4 py-4 flex-wrap flex-shrink-0">
+          <div className="flex items-baseline gap-3 flex-shrink-0 mr-auto">
+            <CardTitle className="text-lg m-0">
               {t("ui.admin.tenants.registry.title", "Tenant Registry")}
             </CardTitle>
-            <CardDescription>
+            <CardDescription className="m-0">
               {t("msg.admin.tenants.registry.count", "총 {{count}}개 테넌트", {
                 count: query.data?.total ?? 0,
               })}
             </CardDescription>
           </div>
           
-          <div className="flex items-end gap-4">
-            <div className="relative flex-1 min-w-[240px] max-w-sm">
-              <label className="text-xs font-medium text-muted-foreground mb-1.5 block">
-                {t("ui.admin.tenants.list.search_label", "테넌트 검색")}
-              </label>
-              <div className="relative">
-                <Search className="absolute left-2.5 top-2.5 h-4 w-4 text-muted-foreground" />
-                <Input
-                  placeholder={t(
-                    "ui.admin.tenants.list.search_placeholder",
-                    "테넌트 이름 또는 슬러그 검색...",
-                  )}
-                  className="pl-9"
-                  value={search}
-                  onChange={(e) => setSearch(e.target.value)}
-                />
-              </div>
+          <div className="flex items-center gap-3">
+            <div className="relative w-[280px]">
+              <Search className="absolute left-2.5 top-2.5 h-4 w-4 text-muted-foreground" />
+              <Input
+                placeholder={t(
+                  "ui.admin.tenants.list.search_placeholder",
+                  "테넌트 이름 또는 슬러그 검색...",
+                )}
+                className="pl-9 h-9"
+                value={search}
+                onChange={(e) => setSearch(e.target.value)}
+              />
             </div>
           </div>
         </CardHeader>