refactor(admin): consolidate duplicate configuration

Remove duplicate comment, captcha, filing, and website-security configuration paths.

Move front submission verification to the captcha scene matrix and retire obsolete admin routes and components.

templates/parts/submit/sidebar-submit.php

@@ -32,9 +32,9 @@ if ($edit_post && in_array($status, ['publish', 'pending'], true)) {
 				<p class="aksrt-submit-hint"><?php esc_html_e('您当前未登录，不能保存草稿，文章提交后不可再修改！', 'aksrt'); ?></p>
 			<?php endif; ?>
 
-			<?php if (!empty($settings['captcha']) && function_exists('aksrt_render_captcha')) : ?>
+			<?php if (function_exists('aksrt_is_captcha_enabled_for') && function_exists('aksrt_render_captcha') && aksrt_is_captcha_enabled_for('front_submit')) : ?>
 				<div class="aksrt-submit-captcha">
-					<?php aksrt_render_captcha('submit'); ?>
+					<?php aksrt_render_captcha('front_submit'); ?>
 				</div>
 			<?php endif; ?>