generate add penalty repeat

docs/changelog.md

@@ -5,6 +5,10 @@ All notable changes to aha will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+### 2026-04-03
+- ChatCompletionParameters add repeat_penalty and repeat_last_n
+- generate add penalty repeat code
+
 ### 2026-04-02
 - refactor generate code 
 - \<think\>...\</think\> The content of the thought chain is returned using the reasoning_content field.
@@ -14,7 +18,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - refactor deepseek_ocr/fun_asr_nano generate code 
 
 ### 2026-03-31
-- add server adn cli mod
+- add server and cli mod
 - aha model name use modelscope id replace 
 - update WhichModel enum 
 - Usage add time info