Fix first-page line numbering off-by-one in transcript DOCX

- Remove docGrid element to prevent phantom grid-based line offset.
- Ensure exactly one lnNumType element (no duplicates).
- First visible line on page 1 now correctly numbered as 1.

scraibe/email_sender.py

@@ -318,7 +318,7 @@ def _create_transcript_section_properties(section):
     - Margins: 1 inch all sides
     - Single column layout
     - Line numbering: start=1, countBy=1, restart each page
-    - Disable document grid to avoid off-by-one line numbering
+    - Remove document grid to avoid off-by-one line numbering
     """
     sectPr = section._sectPr
 
@@ -341,10 +341,13 @@ def _create_transcript_section_properties(section):
         _set_element_attr(cols, "num", "1")
         _set_element_attr(cols, "space", "720")
 
-    # Disable document grid to avoid Word counting phantom grid lines
-    docGrid = sectPr.find(f"{{{W_NS}}}docGrid")
-    if docGrid is not None:
-        _set_element_attr(docGrid, "type", "none")
+    # Remove document grid entirely to avoid phantom grid-based line numbering
+    for docGrid in sectPr.findall(f"{{{W_NS}}}docGrid"):
+        sectPr.remove(docGrid)
+
+    # Ensure exactly one lnNumType element (remove any existing)
+    for lnNumType in sectPr.findall(f"{{{W_NS}}}lnNumType"):
+        sectPr.remove(lnNumType)
 
     # Line numbering: start=1, countBy=1, restart each page
     lnNumType = OxmlElement("w:lnNumType")