Fix transcript DOCX line numbering starting at 2 (docGrid)

- Disable document grid (w:type='none') when enabling line numbering
- Prevents Word from treating an empty grid line as line 1

scraibe/email_sender.py

@@ -327,9 +327,15 @@ def _configure_section_margins(doc, margin=1.0):
 def _enable_line_numbering(section, start_at=1, count_by=1, restart=True):
     """
     Enable line numbering for a specific section.
+    Disables the document grid so Word counts lines based on content, not grid lines.
     """
     sectPr = section._sectPr
 
+    # Disable document grid to avoid Word treating a grid line as line 1
+    docGrid = sectPr.find(qn("w:docGrid"))
+    if docGrid is not None:
+        docGrid.set(qn("w:type"), "none")
+
     # Create the line numbering element: <w:lnNumType>
     lnNumType = OxmlElement("w:lnNumType")
     lnNumType.set(qn("w:start"), str(start_at))