feat: add enable/disable toggle for chore scheduling in ScheduleModal

- Introduced a toggle button to enable or disable chores in the scheduler.
- The toggle will be available in both types of schedulers.
- Added UI design proposal and considerations for mobile dimensions.
- Included E2E tests to ensure toggle state persistence and correct behavior in child view.

backend/tests/test_chore_schedule_api.py

@@ -319,3 +319,96 @@ def test_extend_chore_time_missing_date(client):
 def test_extend_chore_time_bad_child(client):
     resp = client.post('/child/bad-child/task/bad-task/extend', json={"date": "2025-01-15"})
     assert resp.status_code == 404
+
+
+# ---------------------------------------------------------------------------
+# enabled field
+# ---------------------------------------------------------------------------
+
+def test_create_schedule_enabled_by_default(client):
+    """Omitting 'enabled' should persist as True."""
+    payload = {"mode": "days", "day_configs": [{"day": 1, "hour": 8, "minute": 0}]}
+    resp = client.put(f'/child/{TEST_CHILD_ID}/task/{TEST_TASK_ID}/schedule', json=payload)
+    assert resp.status_code == 200
+    assert resp.get_json()["enabled"] is True
+
+
+def test_create_schedule_with_enabled_false(client):
+    """Explicitly setting enabled=False persists correctly."""
+    payload = {
+        "mode": "days",
+        "day_configs": [{"day": 1, "hour": 8, "minute": 0}],
+        "enabled": False,
+    }
+    resp = client.put(f'/child/{TEST_CHILD_ID}/task/{TEST_TASK_ID}/schedule', json=payload)
+    assert resp.status_code == 200
+    assert resp.get_json()["enabled"] is False
+
+
+def test_update_schedule_toggle_enabled(client):
+    """Toggle enabled off, then back on; both changes persist."""
+    base = {"mode": "days", "day_configs": [{"day": 2, "hour": 9, "minute": 0}]}
+
+    r1 = client.put(f'/child/{TEST_CHILD_ID}/task/{TEST_TASK_ID}/schedule', json={**base, "enabled": True})
+    assert r1.get_json()["enabled"] is True
+
+    r2 = client.put(f'/child/{TEST_CHILD_ID}/task/{TEST_TASK_ID}/schedule', json={**base, "enabled": False})
+    assert r2.get_json()["enabled"] is False
+
+    r3 = client.put(f'/child/{TEST_CHILD_ID}/task/{TEST_TASK_ID}/schedule', json={**base, "enabled": True})
+    assert r3.get_json()["enabled"] is True
+
+
+def test_enabled_field_in_get_response(client):
+    """GET response includes the 'enabled' field."""
+    payload = {"mode": "interval", "interval_days": 2, "anchor_date": "", "enabled": False}
+    client.put(f'/child/{TEST_CHILD_ID}/task/{TEST_TASK_ID}/schedule', json=payload)
+
+    resp = client.get(f'/child/{TEST_CHILD_ID}/task/{TEST_TASK_ID}/schedule')
+    assert resp.status_code == 200
+    data = resp.get_json()
+    assert "enabled" in data
+    assert data["enabled"] is False
+
+
+def test_enabled_invalid_value_returns_400(client):
+    """Non-boolean value for enabled returns 400."""
+    payload = {"mode": "days", "day_configs": [], "enabled": "yes"}
+    resp = client.put(f'/child/{TEST_CHILD_ID}/task/{TEST_TASK_ID}/schedule', json=payload)
+    assert resp.status_code == 400
+
+
+# ---------------------------------------------------------------------------
+# ChoreSchedule model: enabled serialization
+# ---------------------------------------------------------------------------
+
+def test_chore_schedule_from_dict_defaults_enabled():
+    """from_dict without 'enabled' defaults to True."""
+    from models.chore_schedule import ChoreSchedule
+    s = ChoreSchedule.from_dict({
+        "child_id": "c1", "task_id": "t1", "mode": "days",
+        "day_configs": [], "interval_days": 2, "anchor_date": "",
+        "interval_has_deadline": True, "interval_hour": 0, "interval_minute": 0,
+    })
+    assert s.enabled is True
+
+
+def test_chore_schedule_from_dict_enabled_false():
+    """from_dict with enabled=False preserves the value."""
+    from models.chore_schedule import ChoreSchedule
+    s = ChoreSchedule.from_dict({
+        "child_id": "c1", "task_id": "t1", "mode": "days",
+        "day_configs": [], "interval_days": 2, "anchor_date": "",
+        "interval_has_deadline": True, "interval_hour": 0, "interval_minute": 0,
+        "enabled": False,
+    })
+    assert s.enabled is False
+
+
+def test_chore_schedule_to_dict_includes_enabled():
+    """to_dict includes the 'enabled' key with the correct value."""
+    from models.chore_schedule import ChoreSchedule
+    s = ChoreSchedule(child_id="c1", task_id="t1", mode="days", enabled=False)
+    d = s.to_dict()
+    assert "enabled" in d
+    assert d["enabled"] is False