Version 1.4.0

• Removed built-in changelog viewer — what's new overlay now shows a simple version notice
• Version string read directly from the DOM instead of changelog.txt
• Best streak (Reports) no longer breaks on zero-dose days
• load() now validates data structure, not just JSON syntax
• Fixed misleading refill tooltip on non-refill medications
• Visual theme resets to dark on data reset
• Saving a deleted medication now shows error instead of false confirmation
• Time-of-day chart no longer counts future doses
• Username resets to default on corrupted data fallback