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/api/news.ts

@@ -0,0 +1,59 @@
+import apiClient from './client';
+import type {
+  NewsArticle,
+  NewsListResponse,
+  NewsCreateRequest,
+  NewsUpdateRequest,
+} from '../types/news';
+
+export const newsApi = {
+  // User endpoints
+  getNews: async (params?: {
+    category?: string;
+    limit?: number;
+    offset?: number;
+  }): Promise<NewsListResponse> => {
+    const response = await apiClient.get<NewsListResponse>('/cabinet/news', { params });
+    return response.data;
+  },
+
+  getArticle: async (slug: string): Promise<NewsArticle> => {
+    const response = await apiClient.get<NewsArticle>(`/cabinet/news/${slug}`);
+    return response.data;
+  },
+
+  // Admin endpoints
+  getAdminNews: async (params?: { limit?: number; offset?: number }): Promise<NewsListResponse> => {
+    const response = await apiClient.get<NewsListResponse>('/cabinet/admin/news', { params });
+    return response.data;
+  },
+
+  getAdminArticle: async (id: number): Promise<NewsArticle> => {
+    const response = await apiClient.get<NewsArticle>(`/cabinet/admin/news/${id}`);
+    return response.data;
+  },
+
+  createArticle: async (data: NewsCreateRequest): Promise<NewsArticle> => {
+    const response = await apiClient.post<NewsArticle>('/cabinet/admin/news', data);
+    return response.data;
+  },
+
+  updateArticle: async (id: number, data: NewsUpdateRequest): Promise<NewsArticle> => {
+    const response = await apiClient.put<NewsArticle>(`/cabinet/admin/news/${id}`, data);
+    return response.data;
+  },
+
+  deleteArticle: async (id: number): Promise<void> => {
+    await apiClient.delete(`/cabinet/admin/news/${id}`);
+  },
+
+  togglePublish: async (id: number): Promise<NewsArticle> => {
+    const response = await apiClient.post<NewsArticle>(`/cabinet/admin/news/${id}/publish`);
+    return response.data;
+  },
+
+  toggleFeatured: async (id: number): Promise<NewsArticle> => {
+    const response = await apiClient.post<NewsArticle>(`/cabinet/admin/news/${id}/feature`);
+    return response.data;
+  },
+};