test(primitives): cover Pagination bridge-page and totalPages=0 branches

Bridge-page-replaces-ellipsis paths (left and right), totalPages=0
hide-the-nav.

3 new tests covering ~5 branches.

Refs #496.

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

frontend/src/lib/shared/primitives/Pagination.svelte.test.ts

@@ -84,4 +84,28 @@ describe('Pagination', () => {
 		const nav = document.querySelector('nav');
 		expect(nav?.getAttribute('aria-label')).toBe('Custom pagination');
 	});
+
+	it('renders the bridge page (no ellipsis) when window is exactly 2 pages from start', async () => {
+		// page=3 (1-indexed=4), totalPages=10 → windowStart=3, first+2=3 → bridge to page 2
+		render(Pagination, { props: { page: 3, totalPages: 10, makeHref } });
+
+		// Should have page 2 directly, not an ellipsis
+		const ellipsisLeft = document.querySelector('[data-testid="pagination-ellipsis-left"]');
+		expect(ellipsisLeft).toBeNull();
+	});
+
+	it('renders the bridge page (no ellipsis) when window is exactly 2 pages from end', async () => {
+		// page=6 (1-indexed=7), totalPages=10 → windowEnd=8, last-2=8 → bridge to page 9
+		render(Pagination, { props: { page: 6, totalPages: 10, makeHref } });
+
+		// Should have page 9 directly, not an ellipsis on the right
+		const ellipsisRight = document.querySelector('[data-testid="pagination-ellipsis-right"]');
+		expect(ellipsisRight).toBeNull();
+	});
+
+	it('returns no result when totalPages is 0', async () => {
+		render(Pagination, { props: { page: 0, totalPages: 0, makeHref } });
+
+		expect(document.querySelector('nav')).toBeNull();
+	});
 });