fix(badge): 修正css变量定义

[irisSong]

🤔 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
  • 优化了徽章点的视觉呈现，现在小尺寸和大尺寸的徽章点可以单独调整，提供更细致的界面美观性和一致性。

[coderabbitai]

Walkthrough

该 PR 修改了 src/styles/variables.scss 中徽章点大小的变量定义。原先同时引用 --nutui-badge-dot-width 作为小和大徽章的宽度，现在分别改为引用 --nutui-badge-dot-small-width 与 --nutui-badge-dot-large-width，从而实现对不同尺寸徽章点的更细致控制。

Changes

文件	变更摘要
src/.../variables.scss	更新了徽章点尺寸变量：$badge-dot-small-width 由引用 --nutui-badge-dot-width 改为引用 --nutui-badge-dot-small-width； $badge-dot-large-width 同理改为 --nutui-badge-dot-large-width。

Possibly related PRs

• fix: 修改tag和badge字体样式变量 #2681：涉及 src/styles/variables.scss 中徽章样式变量的更新，与本 PR 修改内容类似。
• fix(countup): 分隔符文字颜色支持css变量修改 #2871：同样对 variables.scss 中徽章相关变量进行了调整，新增了其他自定义属性。

Suggested reviewers

• xiaoyatong
• oasis-cloud

Poem

小兔跃进代码园，
变量更新显新篇，
徽章分明大小异，
样式焕彩乐开怀，
程序飞扬一路甜！

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.95%. Comparing base (9a903a0) to head (8628e36).
Report is 3 commits behind head on feat_v3.x.

Additional details and impacted files

@@            Coverage Diff             @@
##           feat_v3.x    #3123   +/-   ##
==========================================
  Coverage      86.95%   86.95%           
==========================================
  Files            280      280           
  Lines          18456    18456           
  Branches        2786     2785    -1     
==========================================
  Hits           16049    16049           
  Misses          2402     2402           
  Partials           5        5           

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[coderabbitai]

Actionable comments posted: 0

🧹 Nitpick comments (1)

src/styles/variables.scss (1)

1636-1637: 更新 CSS 变量名以实现更细粒度的徽章点尺寸控制

此次修改将 $badge-dot-small-width 和 $badge-dot-large-width 分别指定为 var(--nutui-badge-dot-small-width, 4px) 与 var(--nutui-badge-dot-large-width, 8px)。这样的调整可以更准确地设置小徽章点和大徽章点的尺寸，有助于在不同场景下对组件进行细节调控。请确认相关文档和组件实现中对这两个变量的引用也已做相应更新，以确保一致性和正确的视觉效果。

📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 384bca0 and 8628e36.

📒 Files selected for processing (1)

• src/styles/variables.scss (1 hunks)

⏰ Context from checks skipped due to timeout of 90000ms (3)

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