[Feature Request] Dynamic Model Mapping & Custom Parameter Injection (e.g., iflow /tab)

[shaoyu12138]

The current model list is hardcoded. This causes two main issues:

1. Outdated List: Existing models (e.g., gemini-2.0-pro) are not available, or using unlisted names results in errors.
2. Lack of Parameter Mapping: Complex logic cannot be defined. For example, iflow models are currently treated uniformly, but in reality, they need to be categorized:
   • Standard: Normal chat models.
   • Reasoning: Models that require sending /tab to toggle reasoning or adjust reasoning strength.

Describe the solution you'd like

I suggest supporting a configuration file to allow Dynamic Model Definitions.

Core Requirements:

1. User-Defined Aliases: Users should be able to add new model names manually to bypass "model not found" errors (e.g., adding gemini-2.0-pro).
2. Parameter Injection (iflow Example): Support mapping a custom alias to specific behaviors.
   • Scenario: Define an alias like iflow-reasoning that maps to the base model plus the /tab command (mapped to reasoning strength).
3. (Optional) Hot Reload: It would be nice if the config could be reloaded without restarting, but the priority is allowing custom definitions.