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/RoutineAssignView.vue

@@ -31,6 +31,8 @@
         {{ isLoading ? 'Saving...' : 'Submit' }}
       </button>
     </div>
+
+    <FloatingActionButton aria-label="Create Routine" @click="goToCreate" />
   </div>
 </template>
 
@@ -39,6 +41,7 @@ import { ref, onMounted } from 'vue'
 import { useRoute, useRouter } from 'vue-router'
 import { setChildRoutines } from '@/common/api'
 import MessageBlock from '../shared/MessageBlock.vue'
+import FloatingActionButton from '../shared/FloatingActionButton.vue'
 import { getCachedImageUrl } from '@/common/imageCache'
 import '@/assets/styles.css'
 import type { Routine } from '@/common/models'
@@ -69,7 +72,7 @@ async function fetchRoutines() {
     const routinesData = await routinesResp.json()
     const rawRoutines: Routine[] = routinesData.routines || []
     await Promise.all(
-      rawRoutines.map(async (r: any) => {
+      rawRoutines.map(async (r: Routine) => {
         if (r.image_id) {
           try {
             r.image_url = await getCachedImageUrl(r.image_id)