fix(web): remove hardcoded mock ticker from public layout

The public layout rendered its own TickerStrip with 8 hardcoded mock
values ('Quận 1 +2.40%', 'Thủ Đức -0.80%', …) above the navbar. The
homepage already has a live DashboardTicker driven by /price-movers,
so this static one was visual noise that disagreed with the real data
just below it. Drop the bar + its helper variables, and update the
layout test to assert the static ticker is gone.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/web/app/[locale]/(public)/__tests__/layout.spec.tsx

@@ -123,13 +123,15 @@ describe('PublicLayout', () => {
     expect(screen.getByTestId('navbar')).toBeInTheDocument();
   });
 
-  it('renders the ticker strip', () => {
+  it('does not render a static ticker strip in the layout', () => {
+    // The layout-level mock ticker was removed in favour of the homepage's
+    // live DashboardTicker driven by /price-movers.
     render(
       <PublicLayout>
         <div>Content</div>
       </PublicLayout>,
     );
-    expect(screen.getByTestId('ticker-strip')).toBeInTheDocument();
+    expect(screen.queryByTestId('ticker-strip')).not.toBeInTheDocument();
   });
 
   it('renders the footer', () => {
@@ -150,15 +152,6 @@ describe('PublicLayout', () => {
     expect(screen.getByTestId('compare-bar')).toBeInTheDocument();
   });
 
-  it('ticker strip has 8 district items', () => {
-    render(
-      <PublicLayout>
-        <div>Content</div>
-      </PublicLayout>,
-    );
-    expect(screen.getByText('8 items')).toBeInTheDocument();
-  });
-
   it('main content has id="main-content" for skip-nav', () => {
     const { container } = render(
       <PublicLayout>