fix: use ensure_ascii=False in task JSON for readable non-ASCII text

Closes #106

Author: bluzername

agents/s07_task_system.py

@@ -62,7 +62,7 @@ def _load(self, task_id: int) -> dict:
 
     def _save(self, task: dict):
         path = self.dir / f"task_{task['id']}.json"
-        path.write_text(json.dumps(task, indent=2))
+        path.write_text(json.dumps(task, indent=2, ensure_ascii=False))
 
     def create(self, subject: str, description: str = "") -> str:
         task = {
@@ -71,10 +71,10 @@ def create(self, subject: str, description: str = "") -> str:
         }
         self._save(task)
         self._next_id += 1
-        return json.dumps(task, indent=2)
+        return json.dumps(task, indent=2, ensure_ascii=False)
 
     def get(self, task_id: int) -> str:
-        return json.dumps(self._load(task_id), indent=2)
+        return json.dumps(self._load(task_id), indent=2, ensure_ascii=False)
 
     def update(self, task_id: int, status: str = None,
                add_blocked_by: list = None, add_blocks: list = None) -> str:
@@ -100,7 +100,7 @@ def update(self, task_id: int, status: str = None,
                 except ValueError:
                     pass
         self._save(task)
-        return json.dumps(task, indent=2)
+        return json.dumps(task, indent=2, ensure_ascii=False)
 
     def _clear_dependency(self, completed_id: int):
         """Remove completed_id from all other tasks' blockedBy lists."""