优化文章seo声明；导出面板新增版权声明功能；

app/common/tools/PostBlock.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace app\common\tools;
+
+use think\facade\View;
+
+class PostBlock
+{
+    public static function  copyright($model_post)
+    {
+
+        return View::fetch(__DIR__ . '/post_block/copyright.html', [
+            'post' => $model_post
+        ]);
+    }
+}

app/common/tools/post_block/copyright.html

@@ -0,0 +1,14 @@
+<blockquote class="copyright">
+    <p>
+        <span>原文标题：</span>{$post->title}
+    </p>
+    <p>
+        <span>原文地址：</span><a href="{$post->read_url}">{$post->read_url}</a>
+    </p>
+    <p>
+        <span>原文平台：</span><a href="http://{:get_system_config('main_domain')}">{:get_system_config('site_name')}</a>
+    </p>
+    <p>
+        <span>版权声明：</span>{:get_system_config('post_copyright')}
+    </p>
+</blockquote>