fix(SearchBar): demos fixed

[xiaoyatong]

🤔 这个变动的性质是？

• 新特性提交
• 日常 bug 修复
• 站点、文档改进
• 演示代码改进
• 组件样式/交互改进
• TypeScript 定义更新
• 包体积优化
• 性能优化
• 功能增强
• 国际化改进
• 重构
• 代码风格优化
• 测试用例
• 分支合并
• 其他改动（是关于什么的改动？）

🔗 相关 Issue

💡 需求背景和解决方案

☑️ 请求合并前的自查清单

⚠️ 请自检并全部勾选全部选项。⚠️

• 文档已补充或无须补充
• 代码演示已提供或无须提供
• TypeScript 定义已补充或无须补充
• fork仓库代码是否为最新避免文件冲突
• Files changed 没有 package.json lock 等无关文件

Summary by CodeRabbit

• Style
  • 调整了搜索栏的背景样式，现在搜索栏内容区统一显示新背景色 (#eee) ，进一步提升了界面的一致性。

[coderabbitai]

Walkthrough

本次修改更新了 Searchbar 示例中的主题配置，在 ConfigProvider 组件中将属性 nutuiSearchbarInputBackground 替换为 nutuiSearchbarContentBackground，并将其值设置为 '#eee'。该更改涉及 h5 与 taro 两个演示文件，且未更改任何导出或公共实体的声明。

Changes

文件路径	变更说明
src/packages/searchbar/demos/{h5,taro}/demo3.tsx	在 ConfigProvider 的主题配置中，将属性 nutuiSearchbarInputBackground 替换为 nutuiSearchbarContentBackground，值设为 '#eee'。

Possibly related PRs

• feat: v15 适配demo页面 #2896：更新了 ConfigProvider 组件的主题配置，直接涉及属性名称替换。
• fix: configprovider docs #3031：同样修改了主题配置中相同属性，更换属性名确保样式一致性。
• feat(Dialog): harmony adaptation #2790：修改了组件主题配置属性，由 nutuiSearchbarInputBackground 改为 nutuiSearchbarContentBackground，与此次更改对应。

Suggested reviewers

• irisSong
• Alex-huxiyang

Poem

小兔轻跳代码间，
改动细语似春烟。
属性更名换新颜，
搜索栏上添温暖。
跃动心情似流云，
幸遇改进乐无边。

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📜 Recent review details

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📥 Commits

Reviewing files that changed from the base of the PR and between 2cf4a75 and 0e07eb4.

📒 Files selected for processing (2)

• src/packages/searchbar/demos/h5/demo3.tsx (1 hunks)
• src/packages/searchbar/demos/taro/demo3.tsx (1 hunks)

⏰ Context from checks skipped due to timeout of 90000ms (1)

• GitHub Check: build

🔇 Additional comments (2)

src/packages/searchbar/demos/h5/demo3.tsx (1)

12-12: 主题配置属性更新正确。

将 nutuiSearchbarInputBackground 修改为 nutuiSearchbarContentBackground 使得主题配置与组件的实际实现保持一致，确保了示例能够正确地展示自定义背景色的效果。

src/packages/searchbar/demos/taro/demo3.tsx (1)

14-14: 主题配置属性更新一致。

将 nutuiSearchbarInputBackground 修改为 nutuiSearchbarContentBackground 使示例代码与 SearchBar 组件的实际主题属性保持一致，此更改与 h5 版本的示例保持同步，确保了 taro 版本的示例也能正确显示自定义背景色效果。

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.95%. Comparing base (2cf4a75) to head (0e07eb4).
Report is 1 commits behind head on next.

Additional details and impacted files

@@           Coverage Diff           @@
##             next    #3100   +/-   ##
=======================================
  Coverage   85.95%   85.95%           
=======================================
  Files         269      269           
  Lines       18495    18495           
  Branches     2795     2795           
=======================================
  Hits        15898    15898           
  Misses       2594     2594           
  Partials        3        3           

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