Summarize the content using the current conversation model

[chengtx809]

Fix bug: #4587
The bug comes from: app/constant.ts

export const SUMMARIZE_MODEL = "gpt-3.5-turbo";
export const GEMINI_SUMMARIZE_MODEL = "gemini-pro";

The problem of writing the summary model to death will result in the failure to summarize when using a non-GPT-3.5-turbo model
I changed it to:

export const UsedModel= `{{model}}`;

export const SUMMARIZE_MODEL = UsedModel;
export const GEMINI_SUMMARIZE_MODEL = UsedModel;

This automatically selects the model used for summarization

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[chengtx809]

错误上传了分支（😭）
一会我再重新提交pr

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Branch uploaded by mistake (😭)
I will resubmit PR later