start: show the normal site header on /start (with the owner dashboard button, highlighted there); no footer on the new-tab page

/start is no longer immersive, so it loads the lazily imported SiteChrome like other pages.
Only the book reader still skips the chrome. hidesFooter() keeps the footer off /start.

src/lib/chrome.test.ts

@@ -1,13 +1,19 @@
 import { describe, expect, it } from 'vitest';
-import { isImmersive } from './chrome';
+import { hidesFooter, isImmersive } from './chrome';
 
 describe('immersive pages', () => {
-	it('skips the site chrome on /start and the book reader only', () => {
-		expect(isImmersive('/start')).toBe(true);
-		expect(isImmersive('/start/')).toBe(true);
+	it('skips the site chrome on the book reader only', () => {
+		expect(isImmersive('/start')).toBe(false);
 		expect(isImmersive('/trackers/books/12/read')).toBe(true);
 		expect(isImmersive('/')).toBe(false);
 		expect(isImmersive('/starter')).toBe(false);
 		expect(isImmersive('/trackers/books/12')).toBe(false);
 	});
+
+	it('shows the header but no footer on /start', () => {
+		expect(hidesFooter('/start')).toBe(true);
+		expect(hidesFooter('/start/')).toBe(true);
+		expect(hidesFooter('/starter')).toBe(false);
+		expect(hidesFooter('/')).toBe(false);
+	});
 });