Fix edition font UUID rebinding and Protocols translation layout

tests/test_navigation.py

@@ -315,3 +315,15 @@ def test_nested_toc_anchor_binds_heading_and_normalizes_visible_ordinal():
     # A nested anchor in ordinary prose must still not become a title.
     assert not _headings(parse_html('<p><a id="prose">A sentence.</a></p>'),
                          'chapter.xhtml#prose', 'Chapter 1. Obsession')[0]
+
+
+def test_graphical_title_binds_using_alt_without_mutating_image():
+    from src.common.html import parse_html
+    from src.preprocessing.navigation import _headings
+    soup = parse_html('<section id="ch"><h1 id="heading">CHAPTER 1'
+                      '<span><img src="word.jpeg" alt="Protocols."/></span>'
+                      '<span><i>for</i> SLEEP</span></h1></section>')
+    before = str(soup)
+    headings, reason = _headings(soup, 'ch.xhtml#ch', 'Chapter 1: Protocols for Sleep')
+    assert reason is None and [h['id'] for h in headings] == ['heading']
+    assert str(soup) == before