Fix #5: reject_task now uses _system_message for proper WS broadcast

src/tracker/api/tasks.py

@@ -459,19 +459,20 @@ async def reject_task(
     task.assignee_id = None
     task.status = TaskStatus.BACKLOG
 
+    old_status = task.status
     await _record_action(db, task, current_member, TaskActionType.UNASSIGNED,
                          "assignee_id", str(old_assignee_id) if old_assignee_id else None, None)
     await _record_action(db, task, current_member, TaskActionType.STATUS_CHANGED,
-                         "status", task.status, TaskStatus.BACKLOG)
+                         "status", old_status, TaskStatus.BACKLOG)
 
-    comment = Message(
-        task_id=task.id,
-        author_type=AuthorType.SYSTEM,
-        author_id=None,
-        content=f"Задача отклонена: {req.reason}",
-        mentions=[],
+    proj_slug = task.project.slug if task.project else ""
+    key = f"{proj_slug[:2].upper()}-{task.number}"
+    await _system_message(
+        db, task,
+        chat_text=f"{key}: отклонена @{current_member.slug} — {req.reason}",
+        task_text=f"@{current_member.slug} отклонил задачу: {req.reason}",
+        project_slug=proj_slug, actor=current_member,
     )
-    db.add(comment)
     await db.commit()
 
     from ..ws.manager import manager