fix(theme): align reference layouts and restore passing contracts

Align homepage and category discovery, modern widgets, admin controls, quotes, and comments with the reference theme. Remove superseded paths and add rendering and behavior coverage. Update stale asset and finance contracts; all 760 Node tests and 139 widget assertions pass.

src/WidgetSystem/WidgetCatalog.php

@@ -13,7 +13,7 @@ final class WidgetCatalog {
 			'general' => [
 				['search', '搜索框', '显示多种样式的站内搜索框', 'sidebar'],
 				['posts_toc', '文章目录树', '显示当前文章的标题目录', 'sidebar'],
-				['quote', '一言', '定时切换本地或在线句子', 'sidebar'],
+				['quote', '一言', '显示并定时切换中英文一言', 'sidebar'],
 				['icon_cards', '图标卡片（竖版）', '图标在文字上方的特色卡片', 'wide'],
 				['video', '视频', '支持常规视频与流媒体格式', 'any'],
 				['embed', '超级嵌入', '按比例嵌入外部在线内容', 'any'],