Add end-to-end tests for task modification and assignment features

- Implemented tests for editing penalty points and reward costs in `penalty-edit-points.spec.ts` and `reward-edit-cost.spec.ts`.
- Created detailed plans for task activation and assignment scenarios in `task-activated.plan.md` and `task-assignment.plan.md`.
- Added comprehensive test cases for modifying tasks, including editing points for chores, kindness acts, penalties, and rewards in `task-modified.plan.md`.
- Ensured all tests are isolated and run in serial mode to maintain state integrity.

frontend/vue-app/src/components/child/ParentView.vue

@@ -246,6 +246,7 @@ function handleOverrideSet(event: Event) {
     // Refresh the appropriate list to show the override badge
     if (payload.override.entity_type === 'task') {
       childChoreListRef.value?.refresh()
+      childKindnessListRef.value?.refresh()
       childPenaltyListRef.value?.refresh()
     } else if (payload.override.entity_type === 'reward') {
       childRewardListRef.value?.refresh()
@@ -259,6 +260,7 @@ function handleOverrideDeleted(event: Event) {
     // Refresh the appropriate list to remove the override badge
     if (payload.entity_type === 'task') {
       childChoreListRef.value?.refresh()
+      childKindnessListRef.value?.refresh()
       childPenaltyListRef.value?.refresh()
     } else if (payload.entity_type === 'reward') {
       childRewardListRef.value?.refresh()