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/en.json

@@ -4473,5 +4473,59 @@
     "shareModalActivateViaCabinet": "Or via website:",
     "copyMessage": "Copy message",
     "shareToastCopied": "Message copied"
+  },
+  "news": {
+    "title": "News & Updates",
+    "filterAll": "All",
+    "readMore": "Read more",
+    "readTime": "min read",
+    "loadMore": "Load more",
+    "noNews": "No news yet",
+    "backToHome": "Back",
+    "views": "views",
+    "admin": {
+      "title": "News Management",
+      "create": "Create Article",
+      "edit": "Edit",
+      "delete": "Delete",
+      "confirmDelete": "Delete this article?",
+      "published": "Published",
+      "draft": "Draft",
+      "featured": "Featured",
+      "titleLabel": "Title",
+      "slugLabel": "URL Slug",
+      "categoryLabel": "Category",
+      "categoryColorLabel": "Category Color",
+      "tagLabel": "Tag",
+      "excerptLabel": "Short Description",
+      "contentLabel": "Content",
+      "imageLabel": "Featured Image",
+      "readTimeLabel": "Read Time (min)",
+      "save": "Save",
+      "saving": "Saving...",
+      "saveError": "Failed to save article. Please try again.",
+      "saved": "Article saved",
+      "deleted": "Article deleted",
+      "toolbar": {
+        "bold": "Bold",
+        "italic": "Italic",
+        "underline": "Underline",
+        "strikethrough": "Strikethrough",
+        "heading1": "Heading 1",
+        "heading2": "Heading 2",
+        "heading3": "Heading 3",
+        "bulletList": "Bullet List",
+        "orderedList": "Ordered List",
+        "blockquote": "Blockquote",
+        "codeBlock": "Code Block",
+        "alignLeft": "Align Left",
+        "alignCenter": "Align Center",
+        "highlight": "Highlight",
+        "link": "Link",
+        "image": "Image",
+        "imageUrlPrompt": "Image URL:",
+        "linkUrlPrompt": "URL:"
+      }
+    }
   }
 }