v0.3.0

PR: Release v0.3.0

Summary

Prepares the release of Re:Leaf v0.3.0.

Release Info

• Version: 0.3.0
• Type: Minor Release (Feature)
• Description: Includes new "Markdown Download" feature and filename sanitization improvements.

Changelog

• Features:
  • Markdown Download: Users can now download the clean reader view as a Markdown (.md) file.
  • Smart Filenames: Downloaded files use the article title (sanitized) as the filename.
• Fixes:
  • Robust filename sanitization (illegal chars, length limits).

Checklist

• manifest.json version is correct (0.3.0).
• package.json version is correct (0.3.0).
• All tests passing.