Mardo 0.9.21

Mardo 0.9.21 adds trackpad pinch zoom anchored under the pointer, Open With
and Command-E handoff to a remembered external editor, and one-step Markdown
link creation when a web URL is pasted over selected text in Rendered Edit.

This release also adds first-launch onboarding and opens .mdx, .mdc,
.qmd, .rmd, .mdtext, and .mdtxt files, including Finder previews.

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Verification

• SHA-256: 850caa258c7d5dd40159ae31df31c679ff88891ef92c5d95167d74253f592f74
• Size: 22802662 bytes
• Apple notarization: c5e526b3-f1df-4a87-a7a6-c44904a62774
• Canonical release record: https://downloads.flooflogic.com/mardo/release.json