fix: release 1.2.1 extraction updates

[miguelcorderocollar]

Prepare ExtractMD 1.2.1 with YouTube transcript fixes, transcript cleanup, universal/article data-image filtering, and local website preview support.

Changes

• Restore YouTube transcript text extraction for the latest transcript DOM.
• Add the default-enabled YouTube line break cleanup setting for timestamp-free transcripts.
• Omit embedded data:image payloads from universal and article Markdown output.
• Bump extension/package/UI versions to 1.2.1 and publish the generated web changelog.
• Add pnpm run preview:web with clean URL support for local website preview.

Benefits

• Fixes empty YouTube transcript output on newer YouTube pages.
• Produces cleaner transcript Markdown when timestamps are disabled.
• Prevents oversized Markdown exports caused by inline base64 image payloads.
• Makes local website preview match Vercel clean URLs such as /changelog.

Closes #75
Closes #72
Closes #73

[vercel]

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Project	Deployment	Actions	Updated (UTC)
extract-md	Ready	Preview, Comment	Apr 20, 2026 6:24pm