fix(comments): restore syntax highlighting for comment code blocks

Comment [code] blocks rendered as bare <pre><code> with only Bootstrap's
grey box — no syntax colours, unlike the reference.

The runtime gates EnlighterJS on `_win.highlight_kg`, which was hardcoded to
false. With that false the selector degrades to `pre code.gl, pre code.special`,
and comment code carries neither class, so it never highlighted. The admin
already exposes 「全局功能 → 代码高亮」 (default on), and jioData.codeHighlight
reads it — only the runtime payload disagreed.

- _win.highlight_kg / highlight_hh / highlight_zt (plus white/dark theme
  names) now come from Settings::get_code_highlight_config(); the initial
  theme follows cookie → mode → time-auto via initial_theme_mode()
- define those values before the _win localize (it sits above jioData in the
  same method)
- inject the reference's two head rules the runtime path was missing:
  max-height from `highlight_maxheight`, and
  `.enlighter-toolbar{display:none}` when `highlight_btn` is off

Tests: comment-image-upload contract gains cases pinning the settings-backed
booleans (and their definition order) and the two inline CSS rules; suite
837/838 with the pre-existing frontend-lifecycle failure.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

src/Core/ScriptsPart1b.php

@@ -49,6 +49,24 @@ trait ScriptsPart1b {
             wp_add_inline_style('jio-public', '.lazyloaded{--lazy-animation:lazy_scale!important;}');
         }
 
+        // 代码高亮的「最大高度」与「扩展按钮」由后台设置驱动。runtime 的
+        // enlighter 路径（评论区 [code] 等）不走 precode.js，需要这两条规则兜底。
+        if (class_exists('\Jio\Settings\Settings')) {
+            $code_highlight_css = \Jio\Settings\Settings::get_code_highlight_config();
+            if (!empty($code_highlight_css['enabled'])) {
+                $max_height_css = (int) $code_highlight_css['maxHeight'];
+                if ($max_height_css > 0) {
+                    wp_add_inline_style(
+                        'jio-public',
+                        '.enlighter-default .enlighter,.wp-block-code:not(:has(.enlighter)),.enlighter-pre:not(:has(.enlighter)){max-height:' . $max_height_css . 'px;overflow-y:auto !important;}'
+                    );
+                }
+                if (empty($code_highlight_css['showButtons'])) {
+                    wp_add_inline_style('jio-public', '.enlighter-toolbar{display:none !important;}');
+                }
+            }
+        }
+
         $core_dep = 'jio-public';
 
         $deps = [$core_dep];

src/Core/ScriptsPart1c.php

@@ -157,6 +157,20 @@ trait ScriptsPart1c {
 			glob(get_template_directory() . '/assets/js/runtime/*.js') ?: []
 		);
 		$runtime_version = $runtime_mtimes !== [] ? (string) max($runtime_mtimes) : $version;
+
+		// 代码高亮（后台「全局功能 → 代码高亮」）：runtime/main.js 的 enlighter
+		// 选择器与主题名都用这份设置，评论区 [code] 代码块才会按参考主题高亮。
+		$code_highlight = class_exists('\Jio\Settings\Settings')
+			? \Jio\Settings\Settings::get_code_highlight_config()
+			: ['enabled' => true, 'lightTheme' => 'enlighter', 'darkTheme' => 'monokai', 'lineNumbers' => false, 'showButtons' => true, 'maxHeight' => 400];
+		// 初始主题：优先 cookie，其次后台模式，最后按时间自动判断。
+		$current_is_dark = class_exists('\Jio\Settings\Settings')
+			&& \Jio\Settings\Settings::initial_theme_mode() === 'dark';
+		$highlight_theme = [
+			'light'   => (string) $code_highlight['lightTheme'],
+			'dark'    => (string) $code_highlight['darkTheme'],
+			'current' => $current_is_dark ? (string) $code_highlight['darkTheme'] : (string) $code_highlight['lightTheme'],
+		];
 		$loader_path = get_template_directory() . '/assets/js/runtime/loader.js';
 		$bootstrap_path = get_template_directory() . '/assets/js/runtime/libs/bootstrap.min.js';
 		$post_page_settings = class_exists('\Jio\Settings\Settings')
@@ -208,12 +222,14 @@ trait ScriptsPart1c {
 				'ajax_trigger'          => __('加载更多', 'jio'),
 				'ajax_nomore'           => __('没有更多了', 'jio'),
 				'qj_loading'            => __('加载中...', 'jio'),
-				'highlight_kg'          => false,
-				'highlight_hh'          => false,
-				'highlight_btn'         => false,
-				'highlight_zt'          => 'enlighter',
-				'highlight_white_zt'    => 'enlighter',
-				'highlight_dark_zt'     => 'dracula',
+				// 代码高亮：与 jioData.codeHighlight 同源（后台「全局功能 → 代码高亮」），
+				// 供 runtime 的 enlighter 选择器与主题名使用。
+				'highlight_kg'          => $code_highlight['enabled'],
+				'highlight_hh'          => $code_highlight['lineNumbers'],
+				'highlight_btn'         => $code_highlight['showButtons'],
+				'highlight_zt'          => $highlight_theme['current'],
+				'highlight_white_zt'    => $highlight_theme['light'],
+				'highlight_dark_zt'     => $highlight_theme['dark'],
 				'upload_img_size'       => 3,
 				'img_upload_multiple'   => 6,
 				'upload_video_size'     => 30,
@@ -449,7 +465,7 @@ trait ScriptsPart1c {
         // 评论回复脚本：由 assets/js/core/comment-move-form.js 提供（legacy 同款机制），
         // 不加载 WP comment-reply，避免两套 moveForm 冲突。
 
-        $runtime_routes = $this->resolve_frontend_routes();
+		$runtime_routes = $this->resolve_frontend_routes();
 
         // 数据注入 - 全站统一消费 window.jioData
         // Attach to loader_js (bootstraps runtime/main) so ajaxUrl/nonce exist