July bug fixes roundup

Fixed several issues reported by the community:

• Fact-checker crash on drafts longer than 10,000 words
• Brand Voice training failing when samples contained special characters
• Calendar timezone showing wrong dates for UTC+8 and beyond
• Export to PDF missing images in some edge cases
• Mobile menu not closing after navigation on iOS Safari

Thanks to everyone who reported these — your bug reports make Skryvo better for everyone.