fix: setting SearchBar.value to an empty string is not respected

[ndonkoHenri]

Description

Fixes #3871

Summary by Sourcery

Fix the issue where setting SearchBar.value to an empty string was not respected by providing a default value in the attribute retrieval.

Bug Fixes:

• Ensure that setting SearchBar.value to an empty string is respected by providing a default value in the attribute retrieval.

[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request addresses an issue where setting the SearchBar.value to an empty string was not being respected. The fix involves modifying how the value attribute is retrieved and handled in the SearchAnchorControl widget.

File-Level Changes

Change	Details	Files
Modified the retrieval of the 'value' attribute in the SearchAnchorControl widget	Removed debug print statement for SearchAnchor build Changed the retrieval of 'value' attribute to use a default empty string Simplified the code by combining two lines into one	packages/flet/lib/src/controls/search_anchor.dart

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[sourcery-ai]

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

Overall Comments:

• Consider adding a brief comment explaining why the default empty string is necessary for the attrString method call. This would help future maintainers understand the reasoning behind this fix.

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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[Katsiuk]

Now it works, but nothing changes in the WEB version. Please take a look.

FYI.

[ndonkoHenri]

Now it works, but nothing changes in the WEB version. Please take a look.

It works on my end with the example code from the example issue. Feel free to open a new issue with complete details to repro the issue.