Sidebar marks the current section on detail pages too

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

Assistant: claude-code
Assistant-Model: sonnet
Assistant-Process: 295952@bnt-lap001
Assistant-Session: e93f64ad-516c-46eb-9666-aad8d300c477

tests/test_ui_shell.py

@@ -71,6 +71,7 @@ def test_the_theme_can_be_chosen_and_is_remembered_and_dark_styles_exist(srv):
     assert "localStorage.getItem('rtut-theme')" in head and "URLSearchParams" in head        # applied before painting; ?theme=dark also works
     assert "system:'light',light:'dark',dark:'system'" in body                              # the button cycles system, light, dark
     assert "aria-current" in body                                                            # the current section is marked
+    assert "'/attribute-sets':['/attribute-set/']" in body and "'/projects':['/project/','/template/']" in body   # detail pages mark their section too
 
 
 def test_the_sidebar_shows_the_saved_name(srv):