style: remove background color from main container
style: update background color for improved contrast
feat: add character count indicator for title input field
feat: add extension URLs for Firefox and Chrome
refactor: move getTitle function inside extractPageMetadata and improve description handling
refactor: streamline post creation logic and improve input validation
fix: update error message for authentication check failure
fix: improve error message for post publication failure
refactor: improve validation logic and error handling in publishPost
fix: update title for the push link popup
chore: update package name and bump version to 1.6.0
refactor: extract TiptapMark interface and reorganize PageMetadata fields
