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>

backend/tests/test_child_api.py

@@ -4,6 +4,7 @@ import os
 
 from flask import Flask
 from api.child_api import child_api
+import api.child_api as child_api_module
 from api.auth_api import auth_api
 from db.db import child_db, reward_db, task_db, users_db, chore_schedules_db, task_extensions_db, pending_confirmations_db
 from tinydb import Query
@@ -585,6 +586,39 @@ def test_list_child_tasks_clears_stale_approved_and_pending(client):
     assert tasks2[TASK_GOOD_ID]['approved_at'] is None
 
 
+def test_list_child_tasks_local_day_keeps_approved_across_utc_rollover(client, monkeypatch):
+    """Approved chore should remain completed when UTC date differs but user-local day matches.
+
+    Example: 2026-05-11T22:30:00Z is 2026-05-12 local day in Pacific/Kiritimati (UTC+14).
+    """
+    _setup_sched_child_and_tasks(task_db, child_db)
+
+    # Force deterministic local-day basis for this endpoint call.
+    monkeypatch.setattr(
+        child_api_module,
+        '_get_user_today_local',
+        lambda user_id: ('2026-05-12', 'Pacific/Kiritimati'),
+    )
+
+    pending_confirmations_db.insert({
+        'id': 'pend_local_day_approved',
+        'child_id': CHILD_SCHED_ID,
+        'entity_id': TASK_GOOD_ID,
+        'entity_type': 'chore',
+        'user_id': 'testuserid',
+        'status': 'approved',
+        'approved_at': '2026-05-11T22:30:00+00:00',
+        'created_at': 1778538600,
+        'updated_at': 1778538600,
+    })
+
+    resp = client.get(f'/child/{CHILD_SCHED_ID}/list-tasks')
+    assert resp.status_code == 200
+    tasks = {t['id']: t for t in resp.get_json()['tasks']}
+    assert tasks[TASK_GOOD_ID]['pending_status'] == 'approved'
+    assert tasks[TASK_GOOD_ID]['approved_at'] == '2026-05-11T22:30:00+00:00'
+
+
 def test_confirm_chore_allows_when_previous_pending_is_stale(client):
     """A stale pending chore record from a prior day must not block confirm-chore."""
     old_ts = (datetime.now(timezone.utc) - timedelta(days=2)).timestamp()