refactor(Dropdown): update dark style

[ArgoZhang]

Link issues

fixes #5710

Summary By Copilot

This pull request includes several changes to the BootstrapBlazor project, focusing on version adjustments and theme updates for dropdown components. The most important changes are listed below:

Version Adjustment:

• src/BootstrapBlazor/BootstrapBlazor.csproj: Downgraded the project version from 9.5.0-beta15 to 9.4.12.

Theme Updates:

• src/BootstrapBlazor/Components/Dropdown/Dropdown.razor.scss: Added dark theme styling for dropdown menus.
• src/BootstrapBlazor/wwwroot/scss/bootstrapblazor-dark.scss: Introduced a new variable $bs-dropdown-bg-dark for dark theme dropdown background color.
• src/BootstrapBlazor/wwwroot/scss/components.scss: Included the Dropdown.razor.scss file to ensure the new dropdown styles are imported.

Regression?

• Yes
• No

Risk

• High
• Medium
• Low

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

Updates the dropdown component to support dark theme styling by introducing a new CSS variable and applying it when the dark theme is active.

Enhancements:

• Adds dark theme styling for dropdown menus.
• Introduces a new CSS variable $bs-dropdown-bg-dark for dark theme dropdown background color.
• Includes the Dropdown.razor.scss file to ensure the new dropdown styles are imported.

[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request focuses on updating the dark theme styles for the dropdown component. It introduces a new scss variable for the dark theme background color and includes the corresponding scss file to apply the new styles. Additionally, the project version was adjusted.

Updated class diagram for Dropdown styles

classDiagram
    class Dropdown {
        ---
        string BackgroundColor
        ---
        +UpdateBackgroundColor(string color)
    }

    note for Dropdown "Added dark theme styling for dropdown menus"

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File-Level Changes

Change	Details	Files
Adjusted the project version.	Downgraded the project version.	src/BootstrapBlazor/BootstrapBlazor.csproj
Implemented dark theme styling for dropdown menus.	Added dark theme styling for dropdown menus. Introduced a new variable for dark theme dropdown background color. Included the Dropdown.razor.scss file to ensure the new dropdown styles are imported.	src/BootstrapBlazor/Components/Dropdown/Dropdown.razor.scss src/BootstrapBlazor/wwwroot/scss/bootstrapblazor-dark.scss src/BootstrapBlazor/wwwroot/scss/components.scss

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#5710	Update the dark style of the dropdown component.	✅

Possibly linked issues

• refactor(Dropdown): update dark style #5710: The PR updates the dark theme styling for dropdown menus, addressing the issue of updating the dark style.

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[sourcery-ai]

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

Overall Comments:

• Consider using CSS variables directly in bootstrapblazor-dark.scss instead of defining new variables like $bs-dropdown-bg-dark.
• It's unusual to downgrade the project version in a feature PR; is this intentional?

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 (2f7011f) to head (c989c90).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #5711   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          657       657           
  Lines        29824     29824           
  Branches      4226      4226           
=========================================
  Hits         29824     29824           

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