New Features

• supports override agent instructions via agent config (#1057)
• support gemini-2.0-flash-thinking-exp (#1067)

Bug Fixes

• invalid schema that array schema missing items (#1049)
• .file path args do not need double backslash on Windows (#1053)
• agent variables don't initialized if start session with last message (#1054)
• don't trim the input text (#1056)

Full Changelog: https://github.com/sigoden/aichat/compare/v0.25.0...v0.26.0