fix: 修复编辑器代码块样式不一致 + 提交 HTML 保留格式 + 详情页布局优化

- 编辑器 pre code 移除 wangEditor 内置 border，与预览区样式统一
- 代码块语言标签 padding 加大并用 !important 对抗 wangEditor 全局重置
- 编辑器 ::before 伪元素仅作降级方案，避免与 JS 注入的 .code-lang-label 冲突
- 编辑器 pre padding-top 统一为 36px，font-size/line-height 对齐预览区
- 提交改用 editor.getHtml()，后端 sanitizeHTML 替代 renderMarkdown，保留富文本格式
- 详情页 post-detail-header 覆盖 common.css sticky，固定在文章卡片内
- 详情页增加白色卡片背景、圆角、阴影和内边距
- 详情页添加代码块语言标签 JS 注入
- 详情页用户名移除括号 UID 显示，移除管理按钮

templates/MetaLab-2026/html/posts/show.html

@@ -8,7 +8,7 @@
         <header class="post-detail-header">
             <h1 class="post-detail-title">{{.Post.Title}}</h1>
             <div class="post-detail-meta">
-                <span class="post-author">{{if .Post.AuthorName}}{{.Post.AuthorName}}({{.Post.UserID}}){{else}}UID{{.Post.UserID}}{{end}}</span>
+                <span class="post-author">{{if .Post.AuthorName}}{{.Post.AuthorName}}{{else}}UID{{.Post.UserID}}{{end}}</span>
                 <span class="post-time">{{.Post.CreatedAt.Format "2006-01-02 15:04"}}</span>
                 {{if ne .Post.Status "approved"}}
                 <span class="post-status post-status-{{.Post.Status}}">{{index $.StatusNames .Post.Status}}</span>
@@ -39,9 +39,6 @@
         {{if and $.Post (eq $.Post.UserID $.UID) (or (eq $.Post.Status "draft") (eq $.Post.Status "rejected"))}}
         <button class="btn btn-primary" id="submitAuditBtn" data-id="{{$.Post.ID}}">提交审核</button>
         {{end}}
-        {{if $.CanAccessAdmin}}
-        <a href="/admin/posts" class="btn btn-secondary">管理</a>
-        {{end}}
     </div>
     {{end}}
 </div>
@@ -51,6 +48,18 @@
 <script src="/static/js/common.js"></script>
 <script>
 (function() {
+    // 代码块语言标签注入
+    document.querySelectorAll('.post-detail-body pre').forEach(function(pre) {
+        var code = pre.querySelector('code[class*="language-"]');
+        if (!code) return;
+        var match = code.className.match(/language-(\w+)/);
+        if (!match) return;
+        var label = document.createElement('span');
+        label.className = 'code-lang-label';
+        label.textContent = match[1];
+        pre.insertBefore(label, pre.firstChild);
+    });
+
     var btn = document.getElementById('submitAuditBtn');
     if (!btn) return;
     btn.addEventListener('click', function() {

templates/MetaLab-2026/static/css/posts.css

@@ -61,11 +61,21 @@
 /* ========== 帖子详情 ========== */
 .post-detail {
     max-width: 800px;
-    margin: 0 auto;
-    padding: 32px 16px;
+    margin: 24px auto 40px;
+}
+
+.post-article {
+    background: #fff;
+    border-radius: 12px;
+    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
+    padding: 40px 48px;
 }
 
 .post-detail-header {
+    position: static !important;
+    z-index: auto !important;
+    box-shadow: none !important;
+    background: transparent !important;
     margin-bottom: 32px;
     padding-bottom: 20px;
     border-bottom: 1px solid #e5e7eb;
@@ -115,28 +125,18 @@
     color: #2980b9;
 }
 
-.post-detail-body pre {
-    position: relative;
-    background: #f3f4f6;
-    padding: 16px;
-    padding-top: 36px;
-    border-radius: 8px;
-    overflow-x: auto;
-    font-size: 14px;
-    line-height: 1.5;
-}
-
-/* 代码块语言标签（编辑器内 + 预览页通用） */
+/* 代码块基础样式（详情页预览 + 编辑器内通用） */
 .post-detail-body pre,
 #editor-container [data-slate-editor] pre {
     position: relative;
     background: #f3f4f6;
-    padding: 16px;
+    padding: 12px 16px;
     padding-top: 36px;
     border-radius: 8px;
     overflow-x: auto;
     font-size: 14px;
     line-height: 1.5;
+    font-family: 'Menlo', 'Consolas', 'Monaco', 'Liberation Mono', monospace;
 }
 
 /* 通过 JS 动态注入语言标签，因为 CSS attr() 无法从 class 中提取 */
@@ -145,7 +145,7 @@
     top: 0;
     left: 0;
     right: 0;
-    padding: 4px 16px;
+    padding: 8px 16px !important;
     background: #e5e7eb;
     color: #6b7280;
     font-size: 11px;
@@ -157,6 +157,7 @@
 .post-detail-body pre code,
 #editor-container [data-slate-editor] pre code {
     background: transparent !important;
+    border: none !important;
     padding: 0 !important;
     font-size: inherit !important;
 }
@@ -433,28 +434,29 @@
     font-style: normal !important;
 }
 
-/* 编辑器内代码块样式 */
+/* 编辑器内代码块样式 — 以预览区样式为准 */
 #editor-container [data-slate-editor] pre {
     position: relative;
     background: #f3f4f6 !important;
     padding: 12px 16px !important;
-    padding-top: 32px !important;
+    padding-top: 36px !important;
     border-radius: 8px !important;
     font-family: 'Menlo', 'Consolas', 'Monaco', 'Liberation Mono', monospace !important;
-    font-size: 13px !important;
-    line-height: 1.6 !important;
+    font-size: 14px !important;
+    line-height: 1.5 !important;
     overflow-x: auto !important;
     margin: 12px 0 !important;
 }
 
-/* 编辑器内代码块语言标签 */
-#editor-container [data-slate-editor] pre::before {
+/* 语言标签由 JS 动态注入 .code-lang-label，不再使用 ::before 伪元素 */
+/* 若 wangEditor 的 pre 上有 data-language 属性，则作为降级方案 */
+#editor-container [data-slate-editor] pre[data-language]::before {
     content: attr(data-language);
     position: absolute;
     top: 0;
     left: 0;
     right: 0;
-    padding: 3px 16px;
+    padding: 8px 16px;
     background: #e5e7eb;
     color: #6b7280;
     font-size: 11px;
@@ -465,6 +467,7 @@
 
 #editor-container [data-slate-editor] pre code {
     background: transparent !important;
+    border: none !important;
     padding: 0 !important;
     font-size: inherit !important;
 }

templates/MetaLab-2026/static/js/editor.js

@@ -372,10 +372,11 @@ form.addEventListener('submit', e => {
     e.preventDefault();
 
     const title = titleEl.value.trim();
-    const body = getEditorText();
+    const body = getEditorHtml();
+    const bodyText = getEditorText();
 
     if (!title) { alert('请输入标题'); return; }
-    if (!body)  { alert('请输入正文'); return; }
+    if (!bodyText)  { alert('请输入正文'); return; }
 
     let url = '/api/posts';
     let method = 'POST';