fix(Scroll): hover scroll width variable not work

[ArgoZhang]

hover scroll width variable not work

Summary of the changes (Less than 80 chars)

简单描述你更改了什么, 不超过80个字符；如果有关联 Issue 请在下方填写相关编号

Description

fixes #5341

Regression?

• Yes
• No

[If yes, specify the version the behavior has regressed from]

[是否影响老版本]

Risk

• High
• Medium
• Low

[Justify the selection above]

Verification

• Manual (required)
• Automated

Packaging changes reviewed?

• Yes
• No
• N/A

☑️ Self Check before Merge

⚠️ Please check all items below before review. ⚠️

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• Merge the latest code from the main branch

Summary by Sourcery

Bug Fixes:

• Fix scrollbar width not being applied on hover.

[sourcery-ai]

Reviewer's Guide by Sourcery

This PR addresses the issue where the hover scroll width variable was not working by modifying the SCSS rules for the scroll component. The change replaces a direct CSS variable usage with explicit pseudo-element styling for handling the scrollbar dimensions.

No diagrams generated as the changes look simple and do not need a visual representation.

File-Level Changes

Change	Details	Files
Updated the SCSS implementation to correctly apply hover scroll dimensions using pseudo-element rules.	Removed the direct assignment of --bb-scroll-width in the hover state. Introduced explicit rules for the ::-webkit-scrollbar pseudo-element to set both width and height using the hover width variable. Maintained consistency with default hover variable fallbacks.	src/BootstrapBlazor/Components/Scroll/Scroll.razor.scss

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#5341	Fix the hover scroll width variable functionality	✅

Possibly linked issues

• bug(Scroll): hover scroll width variable not work #5341: The PR fixes the hover scroll width variable issue.

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[sourcery-ai]

Hey @ArgoZhang - I've reviewed your changes - here's some feedback:

Overall Comments:

• Consider if the height should also be changed on hover.

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (92091df) to head (67719e5).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #5342   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          644       644           
  Lines        28925     28925           
  Branches      4122      4122           
=========================================
  Hits         28925     28925           

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