fix: code review findings - EPUB zoom, double fetch, pandoc flags, dead code

bookish/services/converter.py

@@ -86,8 +86,6 @@ def _convert_with_pandoc(input_path, output_path, input_format, output_format, t
         extra_args += ["--metadata", "title=Converted Document"]
     if output_format == "html":
         extra_args += ["--self-contained", "--mathjax"]
-    if input_format == "pdf":
-        extra_args += ["--pdf-engine=pdflatex"]
 
     pandoc_input = _to_pandoc_format(input_format)
     pandoc_output = _to_pandoc_format(output_format)
@@ -152,19 +150,4 @@ def _convert_docx_to_pdf(input_path, output_path, task_id):
 
 def _post_process(output_path, output_format):
     """Post-processing opzionale sul file generato."""
-    if output_format == "epub":
-        _fix_epub_metadata(output_path)
-
-
-def _fix_epub_metadata(epub_path):
-    """Aggiunge metadati minimi all'epub se mancanti."""
-    try:
-        import zipfile
-        import tempfile
-
-        with zipfile.ZipFile(epub_path, "r") as z:
-            content = z.read("META-INF/container.xml")
-            if b"<dc:title>" not in content:
-                pass
-    except Exception:
-        pass
+    pass