fix: 保留Blog空数据兜底文章

README.md

@@ -35,6 +35,7 @@ pnpm exec playwright test e2e/argon-parity/baseline.spec.ts --project=chromium
 - `e2e/argon-parity` 保存与线上 `https://blog.kwitsukasa.top/` 对齐的页面、视口和交互矩阵。
 - 本地 hash 路由按语义映射 WordPress query 路由：文章、分类、标签、搜索和月份归档都用同一套矩阵验证。
 - 页面根节点通过 `kt-blog--home/search/category/tag/archive/post` 暴露 Argon 页面语义，方便样式、测试和 Admin iframe 预览复用。
+- 公开 Blog API 返回非空文章列表时优先使用 API；API 不可用或返回空列表时保留内置 WordPress 抓取文章种子，避免数据未迁移期间线上静态站变成空站。
 - 文章正文以线上 WordPress `#post_content` 渲染结果和 Argon `style.css` / `argontheme.js` 为准；代码块控制条、复制 toast、Fancybox 图片预览、正文链接 hover、分隔线和图片 lazyload 都必须有 Playwright 断言。
 - `hljs-codeblock` 静态快照需要恢复 Argon `highlightjs-line-numbers` 运行时生成的 `data-line-number` 与 `.hljs-ln-n::before`，否则行号列会坍塌成 0px。
 - 左栏 overview sticky/relative 切换用 no-headroom 回归用例固定，解除 fixed 后不得重放卡片入场动画或产生缩放闪烁。

src/__tests__/useBlogArticles.spec.ts

@@ -123,7 +123,7 @@ describe('useBlogArticles', () => {
     expect(blogArticles.articles.value).toEqual(fallbackArticles);
   });
 
-  it('keeps an empty list when blog public list is reachable but has no articles', async () => {
+  it('falls back to static articles when blog public list is reachable but has no articles', async () => {
     mockFetch([
       {
         body: {
@@ -141,8 +141,8 @@ describe('useBlogArticles', () => {
 
     await blogArticles.loadArticles();
 
-    expect(blogArticles.loadedFromApi.value).toBe(true);
+    expect(blogArticles.loadedFromApi.value).toBe(false);
-    expect(blogArticles.articles.value).toEqual([]);
+    expect(blogArticles.articles.value).toEqual(fallbackArticles);
   });
 
   it('fetches public article detail when cached list data does not include html content', async () => {

src/hooks/useBlogArticles.ts

@@ -121,6 +121,13 @@ export function useBlogArticles() {
   };
 }
 
+/**
+ * Loads the public WordPress article list and keeps the static capture when the API has no usable rows.
+ *
+ * The production Blog API can be reachable before WordPress article data is migrated. An empty successful
+ * response is therefore treated as an unavailable content source so the Argon mirror keeps rendering the
+ * captured WordPress article set instead of turning every route into an empty state.
+ */
 async function loadArticles() {
   if (loadedFromApi.value) return;
   if (loadPromise) return loadPromise;
@@ -129,6 +136,11 @@ async function loadArticles() {
   loadPromise = fetchBlogArticleList()
     .then((result) => {
       const nextArticles = result.list.map(normalizeWordpressArticle);
+      if (!nextArticles.length) {
+        blogArticles.value = fallbackArticles;
+        loadedFromApi.value = false;
+        return;
+      }
       blogArticles.value = nextArticles;
       loadedFromApi.value = true;
     })