feat(Download): add FileName check

[ArgoZhang]

Link issues

fixes #6567

Summary By Copilot

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

Enforce non-null FileName in Download component and remove obsolete NET5_0 conditional logic

Bug Fixes:

• Throw InvalidOperationException when FileName is null or empty in DownloadFromStream
• Throw InvalidOperationException when FileName is null or empty in DownloadFromUrl

Enhancements:

• Remove NET5_0 conditional compilation from DownloadFromStream
• Add System namespace import

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

This PR adds non-empty filename validation to both DownloadFromStream and DownloadFromUrl, removes obsolete .NET version directives in the stream download logic, and includes the missing System namespace import.

Class diagram for updated Download component methods

classDiagram
    class DownloadOption {
        +string FileName
        +Stream FileStream
        +string Url
    }
    class Download {
        +Task DownloadFromStream(DownloadOption option)
        +Task DownloadFromUrl(DownloadOption option)
    }
    Download --> DownloadOption: uses

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Flow diagram for filename validation in download methods

flowchart TD
    A[Start DownloadFromStream or DownloadFromUrl] --> B{Is FileName null or empty?}
    B -- Yes --> C[Throw InvalidOperationException]
    B -- No --> D[Proceed with download logic]

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File-Level Changes

Change	Details	Files
Import missing System namespace	Added "using System;" directive at the top of the file	src/BootstrapBlazor/Components/Download/Download.cs
Enforce FileName non-null and non-empty in download methods	Throw InvalidOperationException if option.FileName is null or empty in DownloadFromStream Throw InvalidOperationException if option.FileName is null or empty in DownloadFromUrl	src/BootstrapBlazor/Components/Download/Download.cs
Remove outdated .NET conditional compilation for stream download	Deleted #if NET5_0 / #elif NET6_0_OR_GREATER blocks and associated await Task.CompletedTask Always use DotNetStreamReference and InvokeVoidAsync unconditionally	src/BootstrapBlazor/Components/Download/Download.cs

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#6567	Add a check to ensure that the FileName property is not null or empty before proceeding with download operations in the Download component.	✅

Possibly linked issues

• feat(Download): add FileName check #6567: The PR adds a check to ensure FileName is not null or empty during downloads, directly addressing the issue's request.

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[sourcery-ai]

Hey @ArgoZhang - I've reviewed your changes and they look great!

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[codecov]

Codecov Report

❌ Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 99.98%. Comparing base (3ddbf27) to head (5ecfeb4).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...rc/BootstrapBlazor/Components/Download/Download.cs	0.00%	4 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##              main    #6568      +/-   ##
===========================================
- Coverage   100.00%   99.98%   -0.02%     
===========================================
  Files          719      719              
  Lines        31560    31566       +6     
  Branches      4450     4452       +2     
===========================================
  Hits         31560    31560              
- Misses           0        4       +4     
- Partials         0        2       +2     

Flag	Coverage Δ
BB	99.98% <0.00%> (?)

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