Move python-docx import to top-level in route_backend_conversation_export.py

[Copilot]

from docx import Document as DocxDocument was placed inside the api_export_message_word route handler body with no comment justifying the inline placement. Per project convention, imports belong at the module level.

Changes

• route_backend_conversation_export.py: Moved from docx import Document as DocxDocument from inside the route handler to the top-level import block alongside the other third-party imports.

# Before
def api_export_message_word():
    from docx import Document as DocxDocument  # inline, no justification
    ...

# After (top of file)
from docx import Document as DocxDocument

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