Refactor favorites management to use Redis

- Removed local favorites.json file and related file handling in the code.
- Implemented Redis caching for managing favorite articles, including methods to set, get, and check favorites.
- Updated TelegramManager and server API to interact with Redis for favorite operations.
- Added search functionality for articles in Redis, enhancing user experience.
- Adjusted frontend components to support searching and displaying articles from Redis.

web/frontend/src/services/api.js

@@ -49,6 +49,13 @@ export default {
     return response.data;
   },
 
+  async searchArticles(query) {
+    const response = await api.get('/articles/search', {
+      params: { q: query },
+    });
+    return response.data;
+  },
+
   // Logs
   async getLogs(limit = 100) {
     const response = await api.get('/logs', {