test: update listing pagination assertions for 20/page (was 100)

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

tests/test_theme_registry.py

@@ -285,8 +285,8 @@ def test_trade_pro_listing_layout_structure(factory):
     import re
     sid = site(factory)
     assert factory.post(f'/api/factory/sites/{sid}/bootstrap').status_code == 200
-    # 105 个产品：/categories/pumps/ 走 render_paginated（LIST_PAGE_SIZE=100，
-    # 两页真实静态分页路由），比 101 次 /entries POST 便宜得多
+    # 105 个产品：/categories/pumps/ 走 render_paginated（LIST_PAGE_SIZE=20，
+    # 六页真实静态分页路由），比 101 次 /entries POST 便宜得多
     products = [{'type': 'product', 'title': f'Bulk Pump {i:03d}',
                  'summary': f'Bulk pump model {i:03d} for export.',
                  'meta': {'fields': {'brand': 'Quanta', 'category': 'Pumps'}}}
@@ -326,7 +326,7 @@ def test_trade_pro_listing_layout_structure(factory):
     assert len(s1.find_all('h1')) == 1
     nav1 = s1.select_one('nav.sf-tp-pagination')
     assert nav1 is not None
-    assert len(s1.select('.sf-tp-card-grid--listing .sf-tp-card')) == 100
+    assert len(s1.select('.sf-tp-card-grid--listing .sf-tp-card')) == 20
     active = nav1.select_one('.sf-tp-page-num.is-active[aria-current="page"]')
     assert active is not None and active.get_text(strip=True) == '1'
     nxt = nav1.select_one('a[rel="next"]')
@@ -339,7 +339,7 @@ def test_trade_pro_listing_layout_structure(factory):
     s2 = BeautifulSoup(cat2.text, 'html.parser')
     assert len(s2.find_all('h1')) == 1
     nav2 = s2.select_one('nav.sf-tp-pagination')
-    assert len(s2.select('.sf-tp-card-grid--listing .sf-tp-card')) == 5
+    assert len(s2.select('.sf-tp-card-grid--listing .sf-tp-card')) == 20
     prev = nav2.select_one('a[rel="prev"]')
     assert prev is not None and prev.get('href', '').endswith('/categories/pumps/')
     assert prev.select_one('svg') is not None