feature: refactor and convergent decentralized structure of AT

## Why you need it?
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English: There are many codes in the AT part, so the convergence of module structure cannot be achieved AT present. Therefore, the module structure involved in the reconstruction of AT becomes clearer.

Chinese: AT模块结构重构，收敛AT部分的代码。

## How it could be?
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## Other related information
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The issue names no files, tests, or entry points. Start by mapping the existing AT modules and reviewing the proposed reconstruction context; the desired result is a clearer, convergent AT module structure, but the scope and completion criteria are not defined.

Written by the indexing model from the issue text.