Aider v0.85.2 release notes

What the release notes say

Added support for Grok-4 via xai/grok-4 and openrouter/x-ai/grok-4 model names.
Added support for gemini/gemini-2.5-flash-lite-preview-06-17 model, by Tamir Zahavi-Brunner.
/clear now prints “All chat history cleared.” so you know it worked, by Zexin Yuan.
/undo output now shows only the first line of each commit message, making it easier to read.
Fixed an issue where new settings for an existing model didn't replace the old ones, by Andrew Grigorev.
Added support for openrouter/moonshotai/kimi-k2 model, by Jack Harrington.