Issue scanny#805 (scanny#805) asked for a way to swap the audio or video binary behind an already-authored media shape without dropping and re-adding it — the media analogue of ``Picture.replace_image`` (scanny#116). This ask is already resolved by Wave 6 scanny#784 which shipped ``Movie.replace_media(new_path_or_file, mime_type=None)``. That method loads the replacement bytes into a fresh ``MediaPart``, rewires the shape's ``a:videoFile``/``a:audioFile`` ``@r:link`` and ``p14:media`` ``@r:embed`` rIds, drops old relationships for GC on save, and preserves position, size, cropping, poster frame, hyperlink, and ``p:timing``. The shape's media-element tag (``a:videoFile`` vs ``a:audioFile``) is also preserved; modality switching (audio ↔ video) remains a documented follow-up. Adds a verify-and-close regression suite ``DescribeIssue805ReplaceMediaVerify`` under ``tests/test_issue_805_replace_media_verify.py`` that pins: - public API surface (``Movie.replace_media`` present); - in-place audio swap with geometry preservation; - in-place video swap with geometry preservation; - a:audioFile modality preserved across replace (no promotion to a:videoFile); - ValueError on replace_media against a non-media p:pic; - full ``Presentation.save`` + reopen round-trip confirming the rewired relationships and replacement blob survive packaging. Also adds an HISTORY.rst Unreleased entry under the ``verify:`` idiom matching sibling scanny#175, scanny#720, scanny#838, scanny#1020, scanny#1106, etc. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

replacing an audio #784

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