feat(admin): 新增弹框是否允许在新标签页中打开 add option to open iframe in new tab

- Add 'iframe_open_top' configuration to admin site settings
- Implement functionality to open iframe in new tab if configured
- Update admin layout to include new configuration option
- Modify easy-admin.js to support new tab opening for iframes

Signed-off-by: wolfcode <37436228+wolf-leo@users.noreply.github.com>

app/admin/view/system/config/site.html

@@ -54,6 +54,15 @@
         </div>
     </div>
 
+    <div class="layui-form-item">
+        <label class="layui-form-label">新标签页窗口</label>
+        <div class="layui-input-block">
+            <input type="radio" name="iframe_open_top" value="0" title="不允许" {if 1!=sysConfig('site','iframe_open_top')}checked{/if}>
+            <input type="radio" name="iframe_open_top" value="1" title="允许" {if 1==sysConfig('site','iframe_open_top')}checked{/if}>
+            <br>
+            <tip>是否允许弹框在新标签页打开。</tip>
+        </div>
+    </div>
 
     <div class="layui-form-item">
         <label class="layui-form-label">默认编辑器</label>