Use embedded line numbers instead of built-in line numbering

- Remove w:lnNumType; line numbers are now plain text in each paragraph.
- Ensures first line is always '1' across Word, LibreOffice, Google Docs.
- Each paragraph: line number + tab + content.

scraibe/email_sender.py

@@ -317,7 +317,7 @@ def _create_transcript_section_properties(section):
     Configure the section properties for transcript DOCX:
     - Margins: 1 inch all sides
     - Single column layout
-    - Line numbering: start=1, countBy=1, restart each page
+    - No built-in line numbering (we embed line numbers as text for portability)
     - Remove document grid to avoid off-by-one line numbering
     """
     sectPr = section._sectPr
@@ -335,43 +335,50 @@ def _create_transcript_section_properties(section):
     _set_element_attr(pgMar, "footer", "720")
     _set_element_attr(pgMar, "gutter", "0")
 
-    # Ensure single column (no multi-column layout that can interfere with line numbering)
+    # Ensure single column (no multi-column layout)
     cols = sectPr.find(f"{{{W_NS}}}cols")
     if cols is not None:
         _set_element_attr(cols, "num", "1")
         _set_element_attr(cols, "space", "720")
 
-    # Remove document grid entirely to avoid phantom grid-based line numbering
+    # Remove document grid entirely
     for docGrid in sectPr.findall(f"{{{W_NS}}}docGrid"):
         sectPr.remove(docGrid)
 
-    # Ensure exactly one lnNumType element (remove any existing)
+    # Remove any built-in line numbering; we will use text-based line numbers
     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")
-    _set_element_attr(lnNumType, "start", "1")
-    _set_element_attr(lnNumType, "countBy", "1")
-    _set_element_attr(lnNumType, "restart", "newPage")
-    sectPr.append(lnNumType)
 
-
-def _add_transcript_paragraph(doc, line_text):
+def _add_transcript_paragraph(doc, line_text, line_number):
     """
-    Add a single transcript line as a paragraph.
-    If it matches timestamp + speaker format, format the label differently.
-    Uses single line spacing and zero before/after spacing so each paragraph = 1 line.
+    Add a single transcript line as a paragraph with an embedded line number.
+    Uses a left tab stop so the line number appears in the left margin area,
+    independent of built-in line numbering, ensuring consistent behavior
+    across Word, LibreOffice, Google Docs, etc.
     """
     line_text = line_text.strip()
     if not line_text:
         return
 
     p = doc.add_paragraph()
-    p.paragraph_format.left_indent = Inches(0.25)
 
-    # Enforce single line spacing with no extra before/after
+    # Set up paragraph formatting:
+    # - No left indent; we control spacing via tab stop
+    # - Single line spacing, no extra before/after
     pPr = p._p.get_or_add_pPr()
+
+    # Remove any default indent
+    pPr.find(f"{{{W_NS}}}ind") and pPr.remove(pPr.find(f"{{{W_NS}}}ind"))
+
+    # Define a left tab stop for line numbers (e.g. 360 twips ≈ 0.25")
+    tabs = OxmlElement("w:tabs")
+    tab = OxmlElement("w:tab")
+    tab.set("{http://schemas.openxmlformats.org/wordprocessingml/2006/main}val", "left")
+    tab.set("{http://schemas.openxmlformats.org/wordprocessingml/2006/main}pos", "360")
+    tabs.append(tab)
+    pPr.append(tabs)
+
     spacing = OxmlElement("w:spacing")
     _set_element_attr(spacing, "before", "0")
     _set_element_attr(spacing, "after", "0")
@@ -381,6 +388,19 @@ def _add_transcript_paragraph(doc, line_text):
 
     # Try to match: [00:00] SPEAKER 1: content
     m = re.match(r"\[(\d+:\d+(?::\d+)?)\]\s*(.+?):\s*(.*)", line_text)
+
+    # Line number run (no underline)
+    run_ln = p.add_run(str(line_number))
+    run_ln.font.name = "Courier"
+    run_ln.font.size = Pt(12)
+    run_ln.underline = False
+
+    # Tab between line number and content
+    run_tab = p.add_run("\t")
+    run_tab.font.name = "Courier"
+    run_tab.font.size = Pt(12)
+    run_tab.underline = False
+
     if m:
         ts, speaker, content = m.groups()
         label_text = f"[{ts}] {speaker.upper()}:"
@@ -417,7 +437,8 @@ def create_transcript_docx(text: str, filename: str):
     Create a transcript DOCX with:
     - 1" margins on all sides
     - 12pt Courier font
-    - Line numbering starting at 1 on the first page
+    - Embedded line numbers starting at 1 on the first page
+      (portable across Word, LibreOffice, Google Docs)
     - Proper formatting for timestamps and speaker labels
     """
     doc = Document()
@@ -432,13 +453,13 @@ def create_transcript_docx(text: str, filename: str):
     for p in list(body.findall(f"{{{W_NS}}}p")):
         body.remove(p)
 
-    # Configure section properties (margins, line numbering, grid)
+    # Configure section properties (margins, no built-in line numbering)
     _create_transcript_section_properties(doc.sections[0])
 
-    # Add transcript lines
+    # Add transcript lines with embedded line numbers
     lines = text.strip().splitlines()
-    for line in lines:
-        _add_transcript_paragraph(doc, line)
+    for idx, line in enumerate(lines, start=1):
+        _add_transcript_paragraph(doc, line, line_number=idx)
 
     # Save
     doc.save(filename)