feat: Implement routines feature with CRUD operations and child assignment

- Add backend routines management with add, get, update, delete, and list functionalities.
- Create models for Routine, RoutineItem, RoutineSchedule, and RoutineExtension.
- Develop event types for routine confirmation and modification.
- Implement frontend components for routine assignment, confirmation dialog, and routine management views.
- Add unit tests for routine API and integration tests for routine CRUD flow.
- Create end-to-end test plan for routines feature covering parent and child interactions.

backend/models/child.py

@@ -6,6 +6,7 @@ class Child(BaseModel):
     name: str
     age: int | None = None
     tasks: list[str] = field(default_factory=list)
+    routines: list[str] = field(default_factory=list)
     rewards: list[str] = field(default_factory=list)
     points: int = 0
     image_id: str | None = None
@@ -17,6 +18,7 @@ class Child(BaseModel):
             name=d.get('name'),
             age=d.get('age'),
             tasks=d.get('tasks', []),
+            routines=d.get('routines', []),
             rewards=d.get('rewards', []),
             points=d.get('points', 0),
             image_id=d.get('image_id'),
@@ -32,6 +34,7 @@ class Child(BaseModel):
             'name': self.name,
             'age': self.age,
             'tasks': self.tasks,
+            'routines': self.routines,
             'rewards': self.rewards,
             'points': self.points,
             'image_id': self.image_id,