Fix: Search app AI summary ERROR And The tag set cannot be selected #9649 #9652 (#9664)

### What problem does this PR solve?
Fix: Search app AI summary ERROR And The tag set cannot be selected
#9649 #9652
- Search app AI summary ERROR: 'dict' object has no attribute 'split'
#9649
- fix The tag set cannot be selected in the knowledge base. #9652
- Added custom parameter options to the LlmSettingFieldItems component
- Adjusted the document preview height to improve page layout
adaptability

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

web/src/locales/zh.ts

@@ -477,6 +477,7 @@ General：实体和关系提取提示来自 GitHub - microsoft/graphrag：基于
       improvise: '即兴创作',
       precise: '精确',
       balance: '平衡',
+      custom: '自定义',
       freedomTip: `“精确”意味着大语言模型会保守并谨慎地回答你的问题。 “即兴发挥”意味着你希望大语言模型能够自由地畅所欲言。 “平衡”是谨慎与自由之间的平衡。`,
       temperature: '温度',
       temperatureMessage: '温度是必填项',