Hide Scripture nav controls in simple interface mode

Use `useSetting('platform.interfaceMode', 'simple')` in InterlinearizerLoader
and render ScriptureNavControls only when the value is 'power'.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: imnasnainaec

__mocks__/papi-frontend-react.ts

@@ -62,6 +62,23 @@ const useLocalizedStrings = jest.fn().mockImplementation((keys: string[]) => [
   false,
 ]);
 
+/**
+ * Mock for `useSetting`. Returns `[defaultState, setSetting, resetSetting, false]`, passing
+ * `defaultState` through unchanged so callers receive a predictable initial value.
+ *
+ * @param _key - Ignored setting key.
+ * @param defaultState - Value surfaced as the current setting state.
+ * @returns Tuple of `[defaultState, jest.fn(), jest.fn(), false]`.
+ */
+const useSetting = jest
+  .fn()
+  .mockImplementation((_key: string, defaultState: unknown) => [
+    defaultState,
+    jest.fn(),
+    jest.fn(),
+    false,
+  ]);
+
 /**
  * Mock for `useRecentScriptureRefs`. Returns an empty history and a no-op `addRecentScriptureRef`
  * so components that display recent references render without errors.
@@ -76,6 +93,7 @@ module.exports = {
   __esModule: true,
   useProjectData,
   useProjectSetting,
+  useSetting,
   useLocalizedStrings,
   useRecentScriptureRefs,
 };

src/__tests__/components/InterlinearizerLoader.test.tsx

@@ -2,7 +2,7 @@
 /// <reference types="jest" />
 /// <reference types="@testing-library/jest-dom" />
 
-import { useLocalizedStrings } from '@papi/frontend/react';
+import { useLocalizedStrings, useSetting } from '@papi/frontend/react';
 import type { SerializedVerseRef } from '@sillsdev/scripture';
 import { render, screen } from '@testing-library/react';
 import userEvent from '@testing-library/user-event';
@@ -134,9 +134,11 @@ describe('InterlinearizerLoader', () => {
     mockBookData();
     mockOptimisticSetting();
     jest.mocked(useLocalizedStrings).mockReturnValue([{}, false]);
+    jest.mocked(useSetting).mockReturnValue(['simple', jest.fn(), jest.fn(), false]);
   });
 
-  it('renders Interlinearizer and the nav controls when book data is available', () => {
+  it('shows nav controls when interface mode is power', () => {
+    jest.mocked(useSetting).mockReturnValue(['power', jest.fn(), jest.fn(), false]);
     render(
       <InterlinearizerLoader
         projectId={testProjectId}
@@ -148,6 +150,18 @@ describe('InterlinearizerLoader', () => {
     expect(screen.getByTestId('interlinearizer')).toBeInTheDocument();
   });
 
+  it('hides nav controls when interface mode is simple', () => {
+    render(
+      <InterlinearizerLoader
+        projectId={testProjectId}
+        useWebViewScrollGroupScrRef={makeScrollGroupHook()}
+      />,
+    );
+
+    expect(screen.queryByTestId('scripture-nav-controls')).not.toBeInTheDocument();
+    expect(screen.getByTestId('interlinearizer')).toBeInTheDocument();
+  });
+
   it('shows Loading when book data has not arrived', () => {
     mockBookData({ book: undefined, isLoading: true });
     render(

src/components/InterlinearizerLoader.tsx

@@ -1,5 +1,5 @@
 import type { UseWebViewScrollGroupScrRefHook } from '@papi/core';
-import { useLocalizedStrings } from '@papi/frontend/react';
+import { useLocalizedStrings, useSetting } from '@papi/frontend/react';
 import { TabToolbar } from 'platform-bible-react';
 import { useMemo } from 'react';
 import ContinuousScrollToggle from './ContinuousScrollToggle';
@@ -28,6 +28,7 @@ export default function InterlinearizerLoader({
   useWebViewScrollGroupScrRef: UseWebViewScrollGroupScrRefHook;
 }>) {
   const [scrRef, setScrRef, scrollGroupId, setScrollGroupId] = useWebViewScrollGroupScrRef();
+  const [interfaceMode] = useSetting('platform.interfaceMode', 'simple');
 
   const {
     isLoading: isSettingLoading,
@@ -51,12 +52,14 @@ export default function InterlinearizerLoader({
     <TabToolbar
       className="tw:z-10"
       startAreaChildren={
-        <ScriptureNavControls
-          scrRef={scrRef}
-          handleSubmit={setScrRef}
-          scrollGroupId={scrollGroupId}
-          onChangeScrollGroupId={setScrollGroupId}
-        />
+        interfaceMode === 'power' ? (
+          <ScriptureNavControls
+            scrRef={scrRef}
+            handleSubmit={setScrRef}
+            scrollGroupId={scrollGroupId}
+            onChangeScrollGroupId={setScrollGroupId}
+          />
+        ) : undefined
       }
       endAreaChildren={
         <ContinuousScrollToggle