v1.4.9

New features and enhancements

• Dynamically hide ui.code's copy button (#2283, #2288 by @frankhuurman, @falkoschindler)
• Introduce caption and group parameter for ui.expansion (#2281 by @thetableman)
• Loosen uvicorn dependency to allow latest versions (#2267 by @rodja)
• Allow HTTP range requests with NiceGUI On Air for serving media files (#2250 by @rodja)
• Allow setting head and body HTML when client is already connected (#2140, #2191 by @retsyo, @falkoschindler)
• Support validation functions with dynamic error messages (#2133, #2150 by @steweg, @adosikas, @falkoschindler)

Bugfixes

• Catch exception when migrating storage files (#2276 by @gavinpotter, @falkoschindler)
• Keep updates and messages in outbox until client is connected (#2272 by @falkoschindler, @rodja, @codingpaula)
• Introduce ui.refreshable_method to avoid mypy error (#2174, #2268 by @falkoschindler, @meirdev)