admin control features and admin dashboard

internal/dashboard/templates/overview.html

@@ -0,0 +1,20 @@
+{{define "overview_page"}}
+<!doctype html>
+<html lang="ru">
+<head>{{template "html_head" .}}</head>
+<body>
+{{template "page_header" .}}
+<main>
+<div id="error-banner">{{template "banner_inner" .Banner}}</div>
+{{template "overview_content" .}}
+</main>
+</body>
+</html>
+{{end}}
+
+{{define "overview_content"}}
+<h1>Обзор</h1>
+<div id="overview-live" hx-get="/overview/fragment" hx-trigger="every {{.PollSeconds}}s" hx-swap="innerHTML">
+{{template "overview_fragment" .}}
+</div>
+{{end}}