Ensure variants for Copilot models work with maxTokens being set

Improvements

• CoreFixed maxOutputTokens being accidentally hardcoded to undefined which caused kimi-k2.5 issues on some inference providers@ideallove
• CoreInclude provider ID in SDK cache key to prevent cache collisions@saba-ch
• CoreAllow media-src data: URL for small audio files in Content Security Policy@tanapok
• CoreUpdate experimental environment variables in CLI documentation@bbabou
• CoreAdd ctx.abort to grep tool
• CoreAdd AbortSignal support to Ripgrep.files() and GlobTool@goniz
• DesktopMake settings more responsive for mobile and small web/desktop@DNGriffin
• DesktopFixed type errors in app package@Brendonovich
• DesktopAuto scroll to file tabs on open and enable mouse wheel scrolling@alexyaroshuk
• DesktopRemove duplicate keys causing TypeScript failures@eXamadeus
• DesktopNormalize Chinese punctuation for Chinese UI@MaxMiksa
• DesktopFill missing Chinese translation keys to avoid English fallback@MaxMiksa
• DesktopFix alignment and padding in dialogs@alexyaroshuk