Refactor and enhance various components and tests

- Remove OverrideEditModal.spec.ts test file.
- Update ParentPinSetup.vue to handle Enter key for code and PIN inputs.
- Modify ChildEditView.vue to add maxlength for age input.
- Enhance ChildView.vue with reward confirmation and cancellation dialogs.
- Update ParentView.vue to handle pending rewards and confirm edits.
- Revise PendingRewardDialog.vue to accept a dynamic message prop.
- Expand ChildView.spec.ts to cover reward dialog interactions.
- Add tests for ParentView.vue to validate pending reward handling.
- Update UserProfile.vue to simplify button styles.
- Adjust RewardView.vue to improve delete confirmation handling.
- Modify ChildrenListView.vue to clarify child creation instructions.
- Refactor EntityEditForm.vue to improve input handling and focus management.
- Enhance ItemList.vue to support item selection.
- Update LoginButton.vue to focus PIN input on error.
- Change ScrollingList.vue empty state color for better visibility.
- Remove capture attribute from ImagePicker.vue file input.
- Update router/index.ts to redirect logged-in users from auth routes.
- Add authGuard.spec.ts to test router authentication logic.

frontend/vue-app/src/components/shared/ChildrenListView.vue

@@ -280,8 +280,8 @@ onBeforeUnmount(() => {
   <div>
     <MessageBlock v-if="children.length === 0" message="No children">
       <span v-if="!isParentAuthenticated">
-        <button class="round-btn" @click="eventBus.emit('open-login')">Sign in</button> to create a
-        child
+        <button class="round-btn" @click="eventBus.emit('open-login')">Switch</button> to parent
+        mode to create a child
       </span>
       <span v-else> <button class="round-btn" @click="createChild">Create</button> a child </span>
     </MessageBlock>