feat: 插件适配页面与系统完善（v0.1.0）

- 修复 /categories、/tags 因变量为 List 误用 .items 导致的 500
- 新增 layout.html 布局契约，消除插件页面 fallback 警告
- 适配 plugin-moments / plugin-photos / plugin-links（含友链申请表单与 RSS 订阅页）
- 适配 halo-weread-plugin（书架页）、留言板单页模板
- 适配 plugin-extra-api 的代码高亮与暗色样式
- 修复暗黑模式评论区不可见（补充 color-scheme 与兜底样式）
- 更新元数据：作者暖心向阳335、版本 0.1.0、requires >=2.26.0

src/category.html

@@ -1,14 +1,45 @@
-<include src="layout.html">
+<include src="partials/layout.html">
   <template name="head">
-    <title th:text="|${category.spec.displayName} - ${site.title}|">Category Archive</title>
+    <title th:text="|${category.spec.displayName} - ${site.title}|">
+      Category
+    </title>
+    <th:block
+      th:with="seoTitle=${category.spec.displayName}, seoUrl=${site.url + category.status.permalink}, seoDesc=${category.spec.description}, seoImage=${category.spec.cover}, seoType='website'"
+    >
+      <include src="seo.html"></include>
+    </th:block>
   </template>
 
-  <h1 th:text="|Category: ${category.spec.displayName}|"></h1>
-  <p th:if="${category.spec.description}" th:text="${category.spec.description}"></p>
+  <div class="container">
+    <!-- 分类标题 -->
+    <div class="category-header">
+      <h1 class="category-title" th:text="${category.spec.displayName}">
+        Category
+      </h1>
+      <p
+        class="category-description"
+        th:if="${not #strings.isEmpty(category.spec.description)}"
+        th:text="${category.spec.description}"
+      ></p>
+    </div>
 
-  <ul class="post-list">
-    <include src="post-card.html"></include>
-  </ul>
+    <!-- 文章列表 -->
+    <div class="post-list" th:if="${not #lists.isEmpty(posts.items)}">
+      <th:block th:each="post : ${posts.items}">
+        <th:block
+          th:replace="~{modules/post-card :: post-card(post=${post})}"
+        ></th:block>
+      </th:block>
+    </div>
 
-  <include src="pagination.html"></include>
+    <!-- 空状态 -->
+    <div class="no-results" th:if="${#lists.isEmpty(posts.items)}">
+      <p th:text="#{list.empty}">Nothing found here.</p>
+    </div>
+
+    <!-- 分页 -->
+    <th:block
+      th:replace="~{modules/pagination :: pagination(context = |${category.status.permalink}/|, prevUrl = ${posts.prevUrl}, nextUrl = ${posts.nextUrl}, totalPages = ${posts.totalPages}, page = ${posts.page}, hasPrevious = ${posts.hasPrevious()}, hasNext = ${posts.hasNext()})}"
+    ></th:block>
+  </div>
 </include>