Release v2.6.0

Features

• Allow user-installed certificates
• Desktop AVX2+ CPU compatibility check

Fixes

• Fix MCP tools serializing array and object arguments as strings
• Fix settings crash on Android 8.0
• Fix potential terminal sheet crashes
• Surface real errors from OpenAI-compatible chat

Improvements

• Tolerate non-standard MCP tool schemas
• Improve SSH Alpine integration (requires re-installing Alpine)
• Add honesty, tool-use, and acting sections to chat system prompt
• Make chat input persistent between screen changes
• Upgrade Compose Multiplatform and SDKs
• Update model catalog
• Remove iOS x64 target and deprecated APIs