Summary

• add a Codex-specific reasoning effort selector in the chat composer and forward it to the Codex SDK
• add Gemini thinking strength controls that map Gemini 3 models to thinkingLevel and Gemini 2.5 models to thinkingBudget presets
• inject Gemini CLI thinking overrides through a temporary session-scoped settings file instead of mutating the user's global Gemini config
• only show explicit control options for model capabilities that were verified, falling back to model defaults otherwise

Testing

• npm run typecheck
• npm run build