Add end-to-end tests for parent item management

- Implement tests for creating, editing, and deleting chores, kindness acts, and penalties.
- Add tests to verify conversion of default items to user items and restoration of system defaults upon deletion.
- Ensure proper cancellation of creation and editing actions.
- Create a comprehensive plan document outlining the test scenarios and expected behaviors.

.github/agents/playwright-test-planner.agent.md

@@ -23,7 +23,7 @@ tools:
   - playwright-test/browser_wait_for
   - playwright-test/planner_setup_page
   - playwright-test/planner_save_plan
-model: Claude Sonnet 4
+model: Claude Sonnet 4.6
 mcp-servers:
   playwright-test:
     type: stdio
@@ -73,6 +73,7 @@ You will:
    Submit your test plan using `planner_save_plan` tool.
 
 **Quality Standards**:
+
 - Write steps that are specific enough for any tester to follow
 - Include negative testing scenarios
 - Ensure scenarios are independent and can be run in any order