breaking changes: toc 配置更改，頁面支持 toc 顯示 close #636

feat: 代碼框設置高度限制，展開後按鈕不會消失，可點擊再次摺疊 close #637
feat: 增加 no-lightbox class 偵測，可配置 fancybox 和 medium-zoom 不應用於圖片 #636
fix: 修復開啟 lazyload 時， fancybox 的縮略圖顯示 lazyload 加載圖片的 bug

layout/includes/head/config_site.pug

@@ -1,13 +1,22 @@
 -
+  const titleVal = pageTitle.replace(/'/ig,"\\'")
+
   let isHighlightShrink
   if (theme.highlight_shrink == 'none') isHighlightShrink = 'undefined'
   else if (page.highlight_shrink === true || page.highlight_shrink === false) isHighlightShrink = page.highlight_shrink
   else isHighlightShrink = theme.highlight_shrink
 
-  var pageToc = page.toc === true || page.toc === false ? page.toc : theme.toc.enable
-  var showToc = is_post() && theme.aside.enable && pageToc && (toc(page.content) !== '' || page.encrypt == true )
-
-  let titleVal = pageTitle.replace(/'/ig,"\\'")
+  var showToc = false
+  if (theme.aside.enable) {
+    let tocEnable = false
+    if (is_post()) {
+      if (theme.toc.post) tocEnable = true
+    } else if (is_page()) {
+      if (theme.toc.page) tocEnable = true
+    }
+    const pageToc = page.toc === true || page.toc === false ? page.toc : tocEnable
+    showToc = pageToc && (toc(page.content) !== '' || page.encrypt == true )
+  }
 -
 
 script#config-diff.