Prepare v4.0.0

[janepie]

Breaking Changes

• drops support for NC<35

Added

• Assignments @marcelklehr #522, #539, #558, #561, #567, #586, #587, #588; @lukasdotcom #550
• Streaming responses @julien-nc #545
• Support for NC35 @janepie #549
• a nice label for mcp_ tools @marcelklehr #581
• Capture and display reasoning content @julien-nc #595
• expose the assistant folder's path in an api @kyteinsky #582
• Audio translation @julien-nc #601
• improve button for text outputs to allow for iteration @lukasdotcom #596
• Subtitles file action @edward-ly #577
• context agent skills endpoints and admin settings @kyteinsky #594
• multimodal chat @lukasdotcom #602

Fixed

• Repair malformed utf-8 obtained when parsing PDFs @julien-nc #569

Changed

• added find_person_in_users to tool list @janepie #535
• Improve empty content message @marcelklehr #563
• Use the current date by default for new messages and new sessions @julien-nc #568
• Give more feedback to user @marcelklehr #576
• Make the text input larger by default @lukasdotcom #590
• Delete chat messages and assignments when user is deleted @lukasdotcom #604
• show user facing exception for message generation in ChattyLLM @lukasdotcom #608
• render markdown in TextInput output @n-iv #540
• use extended markdown for all NcRichText #613
• some translated strings @rakekniven #617
• small UI changes @marcoambrosini #559
• avoid mime_content_type warning on wrapped streams @olddude2 #592
• updated dependencies