添加 mermaid 支持，提高gitalk版本，修复 busuanzi引用span错误

_config.yml

@@ -157,6 +157,13 @@ katex:
   allpost: true
   copy_tex: false
 
+# mermaid 三个选项缺一不可
+mermaid:
+  enable: true
+  version: 8.5.2
+  cdn: https://cdn.bootcdn.net/ajax/libs/mermaid
+  theme: forest
+
 # 网站成立年份(默认为 2019，若填入年份小于当前年份，则显示为 2018-2019 类似的格式)
 since: 2015
 

layout/_partial/after-footer.ejs

@@ -63,4 +63,13 @@
 <!-- CanvasBackground -->
 <% if (theme.canvas_bg == 1) { %>
 <%- js('/js/dz') %>
+<% } %>
+<!-- mermaid -->
+<% if (theme.mermaid.enable) { %>
+  <script src='<%= theme.mermaid.cdn %>/<%= theme.mermaid.version %>/mermaid.min.js'></script>
+  <script>
+    if (window.mermaid) {
+      mermaid.initialize({theme: '<%= theme.mermaid.theme %>'});
+    }
+  </script>
 <% } %>

layout/_partial/post/busuanzi.ejs

@@ -1,5 +1,5 @@
 <span>
-  <span><i class="ri-user-3-fill"></i><%- __('site_visitors') %>:<span id="busuanzi_value_site_uv"></span></s>
+  <span><i class="ri-user-3-fill"></i><%- __('site_visitors') %>:<span id="busuanzi_value_site_uv"></span></span>
   <span class="division">|</span>
   <span><i class="ri-eye-fill"></i><%- __('page_views') %>:<span id="busuanzi_value_page_pv"></span></span>
 </span>

layout/_partial/post/gitalk.ejs

@@ -1,7 +1,7 @@
 <% if (theme.gitalk.enable && post.comments) { %>
 <div class="gitalk" id="gitalk-container"></div>
-<%- css('https://cdn.jsdelivr.net/npm/gitalk@1.6.2/dist/gitalk.css') %>
-<%- js('https://cdn.jsdelivr.net/npm/gitalk@1.6.2/dist/gitalk.min.js') %>
+<%- css('https://cdn.jsdelivr.net/npm/gitalk@1.7.2/dist/gitalk.css') %>
+<%- js('https://cdn.jsdelivr.net/npm/gitalk@1.7.2/dist/gitalk.min.js') %>
 <%- js('https://cdn.jsdelivr.net/npm/blueimp-md5@2.10.0/js/md5.min.js') %>
 <script type="text/javascript">
   var gitalk = new Gitalk({