feat(creator-studio): bottom status bar, editor-rendered math/footnote, code language picker, block delete

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

assets/creator-studio/src/editor-content-style.ts

@@ -42,7 +42,7 @@ img { height: auto; }
 	line-height: 1.5;
 	white-space: pre-wrap;
 }
-.enlighter-pre::before {
+.enlighter-pre .jio-code-lang {
 	position: absolute;
 	top: 9px;
 	right: 9px;
@@ -50,10 +50,13 @@ img { height: auto; }
 	border-radius: 4px;
 	background: linear-gradient(135deg, #3dcabd 10%, #254bdd 100%);
 	color: #fff;
-	content: attr(data-jio-code-label);
 	font-size: 12px;
 	line-height: 1.5;
-	pointer-events: none;
+	cursor: pointer;
+	user-select: none;
+}
+.enlighter-pre .jio-code-lang:hover {
+	filter: brightness(1.08);
 }
 
 /* 引用：与前台主题的 .quote_q 视觉一致。 */
@@ -101,9 +104,21 @@ img { height: auto; }
 }
 .jio-content-table.is-striped tbody tr:nth-child(odd) td { background: #f7f9f8; }
 
-/* 公式与目录占位。 */
-.jio-math { font-family: "Cambria Math", "Latin Modern Math", "Times New Roman", serif; }
-.jio-math--block { display: block; margin: 12px 0; text-align: center; }
+/* 公式。 */
+.jio-math {
+	font-family: "Cambria Math", "Latin Modern Math", "Times New Roman", serif;
+	font-size: 1.05em;
+	white-space: pre-wrap;
+}
+.jio-math--block {
+	display: block;
+	margin: 12px 0;
+	padding: 10px;
+	border-radius: 6px;
+	background: #f8faf9;
+	text-align: center;
+}
+.jio-math sup, .jio-math sub { font-size: 0.72em; }
 .jio-toc-placeholder {
 	height: 40px;
 	margin: 0 0 1.1em;
@@ -117,13 +132,22 @@ img { height: auto; }
 }
 .jio-toc-placeholder::after { content: '目录将在发布后自动生成'; }
 
-/* 注释上标：编辑器里只显示序号，发布后由服务端渲染脚注列表。 */
-.jio-footnote-ref,
-.jio-footnote-ref a {
+/* 注释：编辑器里显示上标标记，发布后由服务端渲染编号与注释列表。 */
+.jio-footnote-ref {
+	display: inline-block;
+	max-width: 100%;
+	padding: 0 6px;
+	border-radius: 4px;
+	background: #eef5f2;
 	color: #267665;
-	font-size: 0.8em;
-	text-decoration: none;
+	font-size: 0.78em;
+	line-height: 1.6;
 	vertical-align: super;
+	cursor: default;
+}
+.jio-footnote-ref::before {
+	content: '注 ';
+	opacity: 0.6;
 }
 
 /* 附件链接。 */