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_override.py

@@ -16,15 +16,15 @@ class ChildOverride(BaseModel):
     """
     child_id: str
     entity_id: str
-    entity_type: Literal['task', 'reward', 'chore', 'kindness', 'penalty']
+    entity_type: Literal['task', 'reward', 'chore', 'kindness', 'penalty', 'routine']
     custom_value: int
 
     def __post_init__(self):
         """Validate custom_value range and entity_type."""
         if self.custom_value < 0 or self.custom_value > 10000:
             raise ValueError("custom_value must be between 0 and 10000")
-        if self.entity_type not in ['task', 'reward', 'chore', 'kindness', 'penalty']:
-            raise ValueError("entity_type must be 'task', 'reward', 'chore', 'kindness', or 'penalty'")
+        if self.entity_type not in ['task', 'reward', 'chore', 'kindness', 'penalty', 'routine']:
+            raise ValueError("entity_type must be 'task', 'reward', 'chore', 'kindness', 'penalty', or 'routine'")
 
     @classmethod
     def from_dict(cls, d: dict):
@@ -52,7 +52,7 @@ class ChildOverride(BaseModel):
     def create_override(
         child_id: str,
         entity_id: str,
-        entity_type: Literal['task', 'reward', 'chore', 'kindness', 'penalty'],
+        entity_type: Literal['task', 'reward', 'chore', 'kindness', 'penalty', 'routine'],
         custom_value: int
     ) -> 'ChildOverride':
         """Factory method to create a new override."""