refactor: убрана фильтрация system messages (перенесена в Tracker)

src/router.ts

@@ -61,20 +61,12 @@ export class EventRouter {
     const chatId = data.chat_id as string | undefined;
     const taskKey = data.task_key as string | undefined;
 
-    // Don't respond to own messages
+    // Don't respond to own messages (safety net — Tracker already filters)
     if (authorSlug === this.config.slug) {
       this.log.debug('Ignoring own message');
       return;
     }
 
-    // System messages: only process if agent is mentioned
-    if (authorType === 'system') {
-      if (!content.includes(`@${this.config.slug}`)) {
-        this.log.debug('Ignoring system message (not mentioned): %s', content.slice(0, 100));
-        return;
-      }
-    }
-
     if (!content) {
       this.log.warn({ data }, 'message.new event missing content');
       return;