Add news feature with CRUD operations and real-time notifications

- Implemented news management functionality, allowing admins to create, read, update, and delete news posts.
- Introduced a new SignalR event for broadcasting news updates to all connected clients.
- Updated API documentation to include new endpoints for news management.
- Enhanced frontend with a dedicated news page and admin interface for managing news posts.
- Added necessary localization for news-related terms in both Russian and English.

frontend/src/shared/lib/i18n.ts

@@ -48,6 +48,7 @@ const resources = {
       nav: {
         dashboard: 'Мои конфиги',
         instructions: 'Инструкции',
+        news: 'Новости',
         settings: 'Настройки',
         admin: 'Админка',
         logout: 'Выйти',
@@ -114,6 +115,11 @@ const resources = {
         },
       },
 
+      news: {
+        title: 'Новости',
+        empty: 'Пока нет новостей.',
+      },
+
       settings: {
         changePassword: 'Сменить пароль',
         currentPassword: 'Текущий пароль',
@@ -150,6 +156,7 @@ const resources = {
           roles: 'Роли',
           nodes: 'Ноды',
           apps: 'Приложения',
+          news: 'Новости',
           audit: 'Аудит',
         },
         users: {
@@ -251,6 +258,17 @@ const resources = {
           deleted: 'Приложение удалено.',
           confirmDelete: 'Удалить приложение из каталога?',
         },
+        news: {
+          create: 'Добавить новость',
+          title: 'Заголовок',
+          body: 'Текст (Markdown)',
+          preview: 'Предпросмотр',
+          empty: 'Новостей пока нет.',
+          created: 'Новость опубликована.',
+          updated: 'Новость обновлена.',
+          deleted: 'Новость удалена.',
+          confirmDelete: 'Удалить новость?',
+        },
         audit: {
           time: 'Время',
           action: 'Действие',
@@ -317,6 +335,7 @@ const resources = {
       nav: {
         dashboard: 'My configs',
         instructions: 'Instructions',
+        news: 'News',
         settings: 'Settings',
         admin: 'Admin',
         logout: 'Log out',
@@ -383,6 +402,11 @@ const resources = {
         },
       },
 
+      news: {
+        title: 'News',
+        empty: 'No news yet.',
+      },
+
       settings: {
         changePassword: 'Change password',
         currentPassword: 'Current password',
@@ -419,6 +443,7 @@ const resources = {
           roles: 'Roles',
           nodes: 'Nodes',
           apps: 'Apps',
+          news: 'News',
           audit: 'Audit',
         },
         users: {
@@ -520,6 +545,17 @@ const resources = {
           deleted: 'App deleted.',
           confirmDelete: 'Remove this app from the catalog?',
         },
+        news: {
+          create: 'Add post',
+          title: 'Title',
+          body: 'Body (Markdown)',
+          preview: 'Preview',
+          empty: 'No news yet.',
+          created: 'Post published.',
+          updated: 'Post updated.',
+          deleted: 'Post deleted.',
+          confirmDelete: 'Delete this post?',
+        },
         audit: {
           time: 'Time',
           action: 'Action',