feat: 后台全中文（Filament zh_CN 语言包+资源中文label）+ 插件独立导航分组 + 插件/主题管理卡片化 + 主题预览图（无头浏览器生成）+ 两套主题移动端适配

themes/sablog/assets/style.css

@@ -114,3 +114,23 @@ a:hover { color: #f60; text-decoration: underline; }
 
 .inline-form { display: inline; }
 .link-btn { background: none; border: none; color: #1c62b0; cursor: pointer; font-size: 13px; padding: 0; font-weight: bold; }
+
+/* ============ 移动端适配 ============ */
+@media (max-width: 768px) {
+    #outmain { width: 100%; }
+    #header { padding: 14px 10px; }
+    .logo a { font-size: 24px; }
+    #nav ul { flex-wrap: wrap; }
+    #nav a { padding: 8px 12px; font-size: 13px; }
+    #page { flex-direction: column; }
+    #content { width: 100%; }
+    .sidebar { width: 100%; }
+    .main-layout { flex-direction: column; }
+    .main-layout .content { width: 100%; }
+    .main-layout .sidebar { width: 100%; }
+    .sidebar .searchbox input[type=search] { width: 70%; }
+    .post-card, .post-full, .comments-section { padding: 14px 16px; }
+    .post-cover { margin: -14px -16px 12px; }
+    .post-full .post-title { font-size: 22px; }
+    .archive-posts { margin-left: 10px; }
+}

themes/sablog/theme.json

@@ -3,5 +3,5 @@
     "version": "1.0.0",
     "description": "移植自 SaBlog-X 经典两栏风格",
     "author": "LaraLog",
-    "screenshot": null
-}
+    "screenshot": "screenshot.png"
+}