v1.2.1 — Bug Fix & Code Cleanup

Fixed

• Notification icon error — fixed "Unable to download all specified images" error on Chrome notifications
• Added web_accessible_resources to manifest for notification icon access
• Proper error handling on notification fallback (Windows button support)

Changed

• Removed unused import in options page
• Fixed malformed regex in keyword rules
• Extracted magic numbers to named constants
• Added accessibility label to settings button
• Improved CONTRIBUTING.md and CHANGELOG.md

Full Changelog: v1.2.0...v1.2.1