feat: add news section with admin editor and public article view

- NewsSection with animated grid background, category filters, featured cards
- AdminNews list page with toggle publish/featured, pagination
- AdminNewsCreate with TipTap rich text editor, URL validation
- NewsArticle detail page with DOMPurify sanitization, Telegram back button
- Toggle component with WCAG 44px touch targets, role=switch
- Prose styles for highlight marks and responsive iframes
- i18n translations (en, ru, zh, fa)

src/locales/zh.json

@@ -3920,5 +3920,59 @@
     "warning": {
       "telegram_unresolvable": "无法验证此 Telegram 用户名。收件人可能不会收到礼物通知。"
     }
+  },
+  "news": {
+    "title": "新闻与更新",
+    "filterAll": "全部",
+    "readMore": "阅读更多",
+    "readTime": "分钟阅读",
+    "loadMore": "加载更多",
+    "noNews": "暂无新闻",
+    "backToHome": "返回",
+    "views": "浏览量",
+    "admin": {
+      "title": "新闻管理",
+      "create": "创建文章",
+      "edit": "编辑",
+      "delete": "删除",
+      "confirmDelete": "删除这篇文章？",
+      "published": "已发布",
+      "draft": "草稿",
+      "featured": "精选",
+      "titleLabel": "标题",
+      "slugLabel": "URL标识",
+      "categoryLabel": "分类",
+      "categoryColorLabel": "分类颜色",
+      "tagLabel": "标签",
+      "excerptLabel": "简短描述",
+      "contentLabel": "内容",
+      "imageLabel": "特色图片",
+      "readTimeLabel": "阅读时间（分钟）",
+      "save": "保存",
+      "saving": "保存中...",
+      "saveError": "保存文章失败，请重试。",
+      "saved": "文章已保存",
+      "deleted": "文章已删除",
+      "toolbar": {
+        "bold": "粗体",
+        "italic": "斜体",
+        "underline": "下划线",
+        "strikethrough": "删除线",
+        "heading1": "标题 1",
+        "heading2": "标题 2",
+        "heading3": "标题 3",
+        "bulletList": "无序列表",
+        "orderedList": "有序列表",
+        "blockquote": "引用",
+        "codeBlock": "代码块",
+        "alignLeft": "左对齐",
+        "alignCenter": "居中",
+        "highlight": "高亮",
+        "link": "链接",
+        "image": "图片",
+        "imageUrlPrompt": "图片URL：",
+        "linkUrlPrompt": "URL："
+      }
+    }
   }
 }