feat: add onXPostMediaClick

[ocavue]

X post cards fire a cancelable meowdown-embed-media-click event for photos and videos (videos now start from a poster button), and Editor and MarkdownView expose it as onXPostMediaClick so a host can show the media in its own lightbox.

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1 Skipped Deployment

Project	Deployment	Actions	Updated
meowdown	Ignored		Sep 18, 2026 6:49pm UTC

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commit: cfb4dc7

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	94.43%	5501 / 5825
🔵	Statements	92.2%	6206 / 6731
🔵	Functions	92.22%	1328 / 1440
🔵	Branches	88.48%	4125 / 4662

File Coverage

File	Stmts	Branches	Functions	Lines	Uncovered Lines
Changed Files
packages/core/src/index.ts	0%	0%	0%	0%
packages/core/src/extensions/editor-config-types.ts	0%	0%	0%	0%
packages/core/src/extensions/extension.ts	100%	88.88%	100%	100%
packages/core/src/extensions/x-post-media-click.ts	100%	100%	100%	100%
packages/embed/src/x/index.ts	0%	0%	0%	0%
packages/embed/src/x/media-click.ts	100%	100%	100%	100%
packages/embed/src/x/render-media.ts	98.64%	87.3%	100%	100%	29
packages/embed/src/x/theme.css	0%	0%	0%	0%
packages/react/src/components/editor.tsx	76.92%	73.91%	72.72%	76.92%	453, 489-501
packages/react/src/components/markdown-view.tsx	96.2%	90.53%	97.87%	99.05%	255, 259, 400, 403-408, 475, 478, 549, 700, 749
packages/react/src/components/prosekit-editor.tsx	93.8%	89.74%	87.87%	95.09%	97, 108, 518, 591-600

Generated in workflow #2362 for commit cfb4dc7 by the Vitest Coverage Report Action