This is a feature update as well as a maintenance release:
AI assistant
* New: AI engines GPT-6 Astra and Gemini 3 Flash
* Changed: GPT-5 mini and Haiku are no longer offered, use GPT-5 Luna instead
* Added: multiple AI actions in one step are now shown together and can be approved or declined at once
* Added: running AI request can now be stopped
* Changed: AI chat no longer steals tab or keyboard focus while working, activity is shown by a busy indicator in the chat tab
* Fixed: files edited or created by AI always open in a single tab, regardless of how the path was written
* Fixed: AI changes to a document are applied as a single step, one Undo reverts the whole edit
Various fixes and improvements
* Changed: files without unsaved changes now always reload automatically when modified outside the editor, the reload setting now applies only to files with unsaved changes, reload can be undone
* Fixed: CSS syntax highlighting of nested selectors like :not(:has(...)) in all languages that embed CSS
* Fixed: crash when switching from Edge preview to Chrome
* Improved: performance optimizations
* Improved: cursor position handling in the editor, display of AI reasoning text and other small fixes