Add PNG logo for e-mails (Mocha, 640x192)

Most mail clients can't show the SVG logo; used by the listmonk templates.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
2026-11-06 21:34:32 -05:00
co-authored by Claude Opus 5.5
parent 98e09627ed
commit 67d8caccce
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