feat: SSR 站点单页 /page/:slug 与 Admin CRUD

EOF

Co-authored-by: Cursor <cursoragent@cursor.com>

templates/base/footer.tmpl

@@ -3,6 +3,7 @@
     <p>
       {{.SiteName}}
       {{if .ShowFriendLinksFooter}} · <a href="/links">友情链接</a>{{end}}
+      {{range .FooterPages}} · <a href="/page/{{.Slug}}">{{.Title}}</a>{{end}}
     </p>
   </footer>
   <script src="/ssr-assets/site.js" defer></script>

templates/base/navbar.tmpl

@@ -12,6 +12,7 @@
         <a href="/#search">搜索</a>
         <a href="/boards">板块</a>
         {{if .ShowFriendLinksNav}}<a href="/links">友链</a>{{end}}
+        {{range .NavPages}}<a href="/page/{{.Slug}}">{{.Title}}</a>{{end}}
         {{if .LoggedIn}}
           <a href="/compose">发帖</a>
           <a href="/messages">私信{{if gt .UnreadCount 0}} <span class="j13-badge">{{.UnreadCount}}</span>{{end}}</a>