securite: #87 T6-T8 fin dette — deps qualifiées, semgrep, Secure auto, CORS

backend/tools/documents.py

@@ -18,7 +18,7 @@ import csv as csv_lib
 import io
 import logging
 import re
-from typing import Any
+from typing import Any, cast
 
 # saxutils.escape uniquement (échappement de chaînes, aucun parsing XML).
 from xml.sax import saxutils  # nosec B406
@@ -173,7 +173,9 @@ def _render_markdown_pdf(content: str, title: str) -> bytes | None:
             escape=False,
             plugins=["table", "strikethrough", "footnotes", "task_lists"],
         )
-        html = renderer(content)
+        # mistune 3.3 types `Markdown.__call__` as `str | list[...]` (le
+        # renderer HTML renvoie toujours `str` à l'exécution).
+        html = cast(str, renderer(content))
         return generate_pdf(build_pdf_html(html, title), title)
     except Exception as e:
         # WeasyPrint loads GTK lazily: a missing native library can surface at