fix: Inline-SVG in HTML-Tabellen als <img> ausgeben (QA2-05)

Eingebettete SVGs in komplexen Tabellen wurden als Markdown-Bild
![…](…) in den HTML-Block geschrieben und daher nicht angezeigt.

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

epub2md/html_converter.py

@@ -1103,6 +1103,8 @@ class Renderer:
             self.formulas.append({"source": self._source(el), "chapter": self.file, "origin": "svg",
                                   "representation": "svg", "display": "false"})
             self.diag.warn("formula-svg", "Formel liegt nur als SVG vor; als Bild referenziert.", self._source(el), self.file)
+        if self.in_table_html:  # Markdown is not rendered inside an HTML block
+            return [("r", f'<img src="{html.escape(url_path(rel_link(self.file, mf.output)))}" alt="{html.escape(alt)}"/>')]
         return [("r", f"![{self._alt(alt)}]({url_path(rel_link(self.file, mf.output))})")]
 
     def math(self, el: Any, display: bool) -> list[Piece]:

tests/test_qa_regressions.py

@@ -86,3 +86,15 @@ def test_end_of_book_reference_inside_html_table_is_html(convert):
     table = _html_table(run.chapter("001"))
     assert "](" not in table, table
     assert '<a href="999-anmerkungen.md#fn-001">1</a>' in table
+
+
+def test_inline_svg_inside_html_table_is_html_img(convert):
+    """QA2-05: inline SVG in a complex table was written as Markdown image inside the HTML block."""
+    body = ('<h1>T</h1><table><tr><th colspan="2">Kopf</th></tr><tr><td>A</td><td>'
+            '<svg xmlns="http://www.w3.org/2000/svg" width="5" height="5" aria-label="Kreis"><circle r="2"/></svg>'
+            "</td></tr></table>")
+    run = convert(Book(docs=[Doc("c.xhtml", body)]))
+    table = _html_table(run.chapter("001"))
+    assert "![" not in table, table
+    assert re.search(r'<img src="\.\./media/images/\d{4}-c-svg\.svg" alt="Kreis"/>', table), table
+    assert run.report["output_link_check"]["broken_count"] == 0