- Introduce config.Load() to handle centralized configuration loading in TOML format
- Add --model flag support across commands with alias resolution via GetModel
- Update root command to load config in PersistentPreRun
- Remove redundant config init and set defaults for model and temperature
- Switch chat command from Bubble Tea TUI to basic CLI with bufio.
- Hardcode Grok model in commands, remove Viper config.
- Stream responses directly in client, remove channel-based streaming.
- Add safe previews/backups in edit, simplify prompts across tools.
- Update git helper and trim unused deps in go.mod.
