feat(tutorial): enhance help button visibility and add dialog tests

- Introduced a mechanism to hide the help button when modal dialogs are open by adding `helpButtonHidden` state in the tutorial controller.
- Updated various components to set the help button visibility based on dialog states.
- Added tests to verify help button visibility during reward and task confirmation dialogs.
- Created new E2E tests for dialog help button functionality across different assignment views.
- Refactored existing dialog components to utilize the new help button visibility logic.
- Added unit tests for `RewardConfirmDialog` and `TaskConfirmDialog` to ensure correct titles are rendered based on task type.
- Enhanced `HelpButton` component tests to validate visibility based on tutorial state.

frontend/src/components/child/ChoreAssignView.vue

@@ -27,6 +27,8 @@
       <button class="btn btn-secondary" @click="onCancel">Cancel</button>
       <button class="btn btn-primary" @click="onSubmit">Submit</button>
     </div>
+
+    <FloatingActionButton aria-label="Create Chore" @click="goToCreate" />
   </div>
 </template>
 
@@ -35,6 +37,7 @@ import { ref } from 'vue'
 import { useRoute, useRouter } from 'vue-router'
 import ItemList from '../shared/ItemList.vue'
 import MessageBlock from '../shared/MessageBlock.vue'
+import FloatingActionButton from '../shared/FloatingActionButton.vue'
 import '@/assets/styles.css'
 import { TASK_FIELDS } from '@/common/models'