Bernard Siebens
b423f0cf12
The iframe's srcdoc="{{ preview.html }}" relied on Django's autoescaping
to correctly re-encode a document full of its own double-quoted
style="..." attributes, and on browser handling of an escaped, inherited-
CSP srcdoc document that didn't render reliably in practice -- the
panel showed blank. EmailPreviewRenderView now serves each preview's
HTML as an ordinary same-origin response at its own URL, and the
iframe just points `src` at it -- xframe_options_sameorigin overrides
the site-wide X-Frame-Options: DENY (SecurityMiddleware's default,
unset in settings.py) since this response only needs to be framed by
the page linking to it.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01ECGMEwrc2k4D8VQuwjstj9