fix(SearchBar): demo 样式变量修订

[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

• 样式
  • 优化了搜索栏背景配置，提高了主题设置的一致性。视觉效果保持不变。

[coderabbitai]

Walkthrough

此次提交在两个示例文件（H5 与 Taro 版本）的 Demo3 函数中更新了 ConfigProvider 的主题配置。具体来说，将属性 nutuiSearchbarInputBackground 修改为 nutuiSearchbarContentBackground，且赋值仍为 '#eee'，从而调整了搜索栏相关背景属性的命名。

Changes

文件路径	变更说明
src/.../searchbar/demos/h5/demo3.tsx src/.../searchbar/demos/taro/demo3.tsx	在 ConfigProvider 组件的主题配置中，将 nutuiSearchbarInputBackground 重命名为 nutuiSearchbarContentBackground，值不变

Possibly related PRs

• feat(Dialog): harmony adaptation #2790: 修改了 ConfigProvider 内搜索栏背景样式属性的名称，与此次提交在代码层面上直接相关。
• feat: v15 适配demo页面 #2896: 同步调整了搜索栏背景属性命名，体现了主题配置的一致性修改。
• fix: configprovider docs #3031: 针对 ConfigProvider 组件的主题设置进行调整，直接涉及搜索栏属性的改动。

Suggested reviewers

• oasis-cloud
• Alex-huxiyang

Poem

我是一只活泼的小兔子，
代码里跳跃有新意；
搜索栏换了个名字，
背景依旧温柔如昔。
路径改变虽细微，
🐰 快乐代码乐无比！

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📜 Recent review details

Configuration used: CodeRabbit UI
Review profile: CHILL
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📥 Commits

Reviewing files that changed from the base of the PR and between febca3e and 9a4eb45.

📒 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: test

🔇 Additional comments (2)

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

14-14: 主题属性名称已正确更新

将 nutuiSearchbarInputBackground 更改为 nutuiSearchbarContentBackground 反映了组件内部实现的变化，更准确地表示了这个属性控制的是内容区域的背景色而非输入框本身。这个修改与组件的最新实现保持一致。

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

12-12: 主题属性名称已正确更新

将 nutuiSearchbarInputBackground 更改为 nutuiSearchbarContentBackground 使属性名称更加清晰，准确地反映了该属性控制的是内容区域的背景色。这个修改与 Taro 版本保持一致，确保了跨平台实现的统一性。

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.49%. Comparing base (febca3e) to head (9a4eb45).
Report is 1 commits behind head on feat_v3.x.

Additional details and impacted files

@@            Coverage Diff             @@
##           feat_v3.x    #3101   +/-   ##
==========================================
  Coverage      86.49%   86.49%           
==========================================
  Files            280      280           
  Lines          18492    18492           
  Branches        2774     2775    +1     
==========================================
  Hits           15994    15994           
  Misses          2493     2493           
  Partials           5        5           

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