refactor: 优化文章和页面创建页面的别名布局结构

src/routes/admin/pages/new/+page.svelte

@@ -102,10 +102,8 @@
 			</div>
 
 			<div class="sidebar-box">
-				<div
+				<h3 style="display: flex; justify-content: space-between; align-items: center;">
-					style="display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.5rem;"
+					<span>别名 *</span>
-				>
-					<h3 style="margin: 0;">别名 *</h3>
 					<button
 						type="button"
 						style="background: none; border: none; padding: 0; color: #666; font-size: 0.8rem; cursor: pointer; outline: none;"
@@ -114,7 +112,7 @@
 					>
 						{isGenerating ? '正在生成...' : '重新生成'}
 					</button>
-				</div>
+				</h3>
 				<input
 					type="text"
 					id="slug"

src/routes/admin/posts/new/+page.svelte

@@ -512,10 +512,8 @@
 			<FeaturedImagePicker bind:cover adaptiveHeight previewable />
 
 			<div class="sidebar-box">
-				<div
+				<h3 style="display: flex; justify-content: space-between; align-items: center;">
-					style="display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.5rem;"
+					<span>别名 *</span>
-				>
-					<h3 style="margin: 0;">别名 *</h3>
 					<button
 						type="button"
 						style="background: none; border: none; padding: 0; color: #666; font-size: 0.8rem; cursor: pointer; outline: none;"
@@ -525,7 +523,7 @@
 					>
 						{isGenerating ? '正在生成...' : '重新生成'}
 					</button>
-				</div>
+				</h3>
 				<input
 					type="text"
 					id="slug"