Cursor Claude 4 Opus Support

It seems they may use different API parameters to define how we add Max / Thinking abilities now, and simply change the model name does not work. ``` Claude 4 Opus and Claude 4 Opus Thinking are only available with Max mode. Upgrade to version 0.50.0 to use these models. {"error":{"message":"[resource_exhausted] Claude 4 Opus and Claude 4 Opus Thinking are only available with Max mode. Upgrade to version 0.50.0 to use these models."}} ``` After upgrade the UA to 0.50.0: ``` [not_found] Model name is not valid: claude-4-opus-max {"error":{"message":"[not_found] Model name is not valid: claude-4-opus-max"}} ``` ``` [not_found] Model name is not valid: claude-4-opus-thinking-max {"error":{"message":"[not_found] Model name is not valid: claude-4-opus-thinking-max"}} ```