feat: 支持在后台文章管理界面中使用动态分类别名

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

@@ -79,7 +79,7 @@
 				</th>
 				<th>ID</th>
 				<th>标题</th>
-				<th>分类</th>
+				<th>{$page.data.aliases?.category || '分类'}</th>
 				<th>{$page.data.aliases?.series || '系列'}</th>
 				<th>别名</th>
 				<th>发布时间</th>
@@ -105,7 +105,11 @@
 							<ExternalLink size={16} aria-hidden="true" />
 						</a>
 					</td>
-					<td><span class="badge">{post.category || '未分类'}</span></td>
+					<td
+						><span class="badge"
+							>{post.category || `未${$page.data.aliases?.category || '分类'}`}</span
+						></td
+					>
 					<td>{post.series || '—'}</td>
 					<td><SlugBadge slug={post.slug} /></td>
 					<td>{post.dateStr}</td>

src/routes/admin/posts/[id]/+page.svelte

@@ -207,10 +207,10 @@
 				</div>
 
 				<div class="sidebar-box">
-					<h3>分类</h3>
+					<h3>{$page.data.aliases?.category || '分类'}</h3>
 					<SelectDropdown
 						name="category_id"
-						label="分类"
+						label={$page.data.aliases?.category || '分类'}
 						options={data.categories.map((category) => ({
 							value: category.id,
 							label: category.name

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

@@ -238,10 +238,10 @@
 				</div>
 
 				<div class="sidebar-box">
-					<h3>分类</h3>
+					<h3>{$page.data.aliases?.category || '分类'}</h3>
 					<SelectDropdown
 						name="category_id"
-						label="分类"
+						label={$page.data.aliases?.category || '分类'}
 						options={data.categories.map((category) => ({
 							value: category.id,
 							label: category.name