feat(creator-studio): icon toolbar with block tools, drop author strip

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

assets/css/build/single.css

@@ -678,6 +678,80 @@ article.article.box-body,
   overflow: hidden;
 }
 
+
+/* ---------- 正文扩展块：公式、脚注、附件、目录 ---------- */
+
+.jio-math {
+  display: inline-block;
+  padding: 0 2px;
+  font-family: "Cambria Math", "Latin Modern Math", "Times New Roman", serif;
+  font-size: 1.02em;
+  white-space: pre-wrap;
+}
+
+.jio-math--block {
+  display: block;
+  margin: 12px 0 18px;
+  text-align: center;
+}
+
+.jio-footnotes {
+  margin-top: 32px;
+  padding-top: 18px;
+  border-top: 1px solid var(--main-border-color, rgba(50, 50, 50, 0.06));
+  font-size: 13px;
+}
+
+.jio-footnotes__title {
+  margin: 0 0 10px;
+  color: var(--muted-color, #777);
+  font-size: 13px;
+  font-weight: 600;
+}
+
+.jio-footnotes__list {
+  margin: 0;
+  padding-left: 20px;
+  color: var(--muted-color, #777);
+  line-height: 1.8;
+}
+
+.jio-footnotes__list li {
+  margin-bottom: 6px;
+}
+
+.jio-footnote-ref a,
+.jio-footnote-back {
+  color: var(--theme-color, #267665);
+  text-decoration: none;
+}
+
+.jio-footnote-ref a:hover,
+.jio-footnote-back:hover {
+  text-decoration: underline;
+}
+
+/* 编辑器插入的轻量附件链接 */
+.wp-posts-content .jio-file-link {
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+  padding: 6px 12px;
+  border: 1px solid var(--main-border-color, rgba(50, 50, 50, 0.08));
+  border-radius: var(--mini-radius, 6px);
+  background: var(--muted-bg-2-color, #f6f7f8);
+  text-decoration: none;
+}
+
+.wp-posts-content .jio-file-link i {
+  color: var(--theme-color, #267665);
+}
+
+/* 目录占位渲染成文章目录卡片时，卡片自带间距，这里只补上下留白。 */
+.wp-posts-content .posts-nav-box {
+  margin: 20px 0;
+}
+
 /* source: assets/css/frontend/single-post/author-actions.css */
 /* ===== Content Footer ===== */
 .article-footer {