Add routine management features for child and parent views

- Implemented routine child-mode flow tests to ensure proper functionality of routine assignment and task completion.
- Created notification tests for parent view to verify routine completion notifications for children.
- Developed ChildRoutineOverlay component for displaying routine tasks and handling user interactions.
- Added RoutineApproveDialog component for approving or rejecting completed routines.
- Created unit tests for ChildRoutineOverlay and RoutineEditView components to ensure correct behavior and rendering.
- Enhanced RoutineEditView with proper handling of task addition and form submission.

Co-authored-by: Copilot <copilot@github.com>

frontend/src/common/models.ts

@@ -84,6 +84,7 @@ export interface ChildRoutine {
   extension_date?: string | null
   pending_status?: 'pending' | 'approved' | null
   approved_at?: string | null
+  pending_confirmation_id?: string | null
   items: RoutineItem[]
 }
 
@@ -128,7 +129,16 @@ export interface Child {
   image_id: string | null
   image_url?: string | null // optional, for resolved URLs
 }
-export const CHILD_FIELDS = ['id', 'name', 'age', 'tasks', 'routines', 'rewards', 'points', 'image_id'] as const
+export const CHILD_FIELDS = [
+  'id',
+  'name',
+  'age',
+  'tasks',
+  'routines',
+  'rewards',
+  'points',
+  'image_id',
+] as const
 
 export interface Reward {
   id: string