fix(admin): replicate reference front-submit settings page 1:1

- Rewrite post_list/submit schema (PHP + JS) with the reference theme's
  field set, order, defaults and dependencies; topics fields excluded
- Map PostDisplay::get_submit_settings() and the FrontSubmit runtime to
  the new keys without legacy fallback
- Guest submission follows the capability matrix; category required on
  submit; pay limits read from the cash/points fieldset
- Drop dead front_submit_* settings, template branches and JS config
- Add submit settings reference contract test

templates/pages/page-submit.php

@@ -26,13 +26,6 @@ if (empty($ctx['enabled'])) {
 	return;
 }
 
-// Guest without guest mode → login.
-if (!empty($ctx['is_guest']) && empty($ctx['settings']['guest_enabled'])) {
-	$login = function_exists('aksrt_get_login_url') ? aksrt_get_login_url(get_permalink()) : wp_login_url(get_permalink());
-	wp_safe_redirect($login);
-	exit;
-}
-
 // Invalid edit id → strip.
 if (!empty($_GET['edit']) && empty($ctx['edit_post'])) {
 	wp_safe_redirect(remove_query_arg('edit'));
@@ -103,7 +96,6 @@ if (file_exists($js)) {
 			],
 
 
-		'leaveWarning' => !empty($ctx['settings']['leave_warning']),
 		'imageUploadMultiple' => $image_upload_multiple,
 		'ai'        => [
 			'available' => !empty($ctx['ai_available']),

templates/parts/submit/context.php

@@ -175,8 +175,6 @@ if ($is_guest) {
 	$submit_label = __('审核', 'aksrt');
 } elseif ($edit_post && in_array($post_status, ['publish', 'pending'], true)) {
 	$submit_label = __('保存', 'aksrt');
-} elseif (($settings['review_mode'] ?? 'pending') === 'pending' && !$cap('new_post_audit_no')) {
-	$submit_label = __('审核', 'aksrt');
 }
 
 $ai_available = class_exists('\AKSRT\Ai\AI') && \AKSRT\Ai\AI::get_instance()->is_available();

templates/parts/submit/featured.php

@@ -7,9 +7,6 @@
  */
 defined('ABSPATH') || exit;
 
-if (empty($ctx['settings']['allow_cover'])) {
-	return;
-}
 if (empty($ctx['can_cover_image']) && empty($ctx['can_cover_slide']) && empty($ctx['can_cover_video'])) {
 	return;
 }

templates/parts/submit/sidebar-submit.php

@@ -2,12 +2,10 @@
 /** @var array $ctx */
 defined('ABSPATH') || exit;
 
-$settings   = $ctx['settings'];
 $is_can_new = !empty($ctx['is_can_new']);
 $status     = (string) $ctx['post_status'];
 $can_draft  = !empty($ctx['user_id'])
 	&& empty($ctx['is_guest'])
-	&& !empty($settings['draft_save'])
 	&& !in_array($status, ['publish', 'pending'], true);
 ?>
 <div class="zib-widget">

templates/parts/submit/sidebar-terms.php

@@ -25,7 +25,6 @@ require_once get_template_directory() . '/templates/parts/submit/term-checks.php
 <div class="zib-widget mb10-sm">
 	<div class="title-theme mb10"><?php esc_html_e('文章参数', 'aksrt'); ?></div>
 	<div class="term-select-box">
-		<?php if (!empty($settings['allow_category'])) : ?>
 		<div class="newpost-cat-drop drop-select dropdown dependency-box">
 			<button type="button" data-toggle-class="open" data-target=".newpost-cat-drop" class="flex ac jsb drop-btn form-control mb6">
 				<span class="title-theme222"><i class="fa fas fa-folder-open mr6" aria-hidden="true"></i><?php esc_html_e('分类', 'aksrt'); ?></span><i class="ml6 fa fas fa-angle-right em12"></i>
@@ -42,7 +41,6 @@ require_once get_template_directory() . '/templates/parts/submit/term-checks.php
 				</div>
 			</div>
 		</div>
-		<?php endif; ?>
 
 		<?php if (!empty($settings['custom_filter_s']) && !empty($ctx['custom_dimensions'])) : ?>
 			<?php foreach ($ctx['custom_dimensions'] as $dimension) :