Add separate model selectors for Grok Build main, general-purpose,
explore, and plan agents. Each override gets an independent 9Router
custom-model slot and context_window derived from 9Router model
capabilities. Preserve and restore pre-existing config on reset.
Add Grok Build to Dashboard → CLI Tools. Apply writes a [model.9router]
custom model to ~/.grok/config.toml and sets [models].default, routing
the xAI Grok TUI through 9Router. Reset removes the slot and restores
the previous default.
rixzkiye