- Auto-select default rule set on dialog load, fallback to first item if no default exists
- Auto-select default prompt template on dialog load, fallback to first item if no default exists
- Remove empty option from rule set and prompt template selectors
- Update placeholder text from "默认规则" to "选择规则集" and "默认提示词" to "选择提示词模板"
- Add visual indicator "(默认)" badge to default items in dropdown lists
- Update label text from "提示词" to "提示词模板" for clarity
- Add ruleSets and promptTemplates to useEffect dependency array to maintain default selections on dialog reopen
- Improve UX by ensuring users always have a valid selection without manual intervention
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