fix(regression): Setting Image.src_base64 returns ErrorControl

[ndonkoHenri]

Description

Fixes #3909

Summary by Sourcery

Fix the regression that caused setting Image.src.base64 to return an error by ensuring the image is returned upon successful decoding.

Bug Fixes:

• Fix the issue where setting Image.src.base64 incorrectly returns ErrorControl by ensuring the image is returned when successfully decoded.

[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request fixes a regression issue where setting Image.src.base64 was returning an ErrorControl instead of the expected image. The changes involve modifying the buildImage function in the box.dart file to correctly handle base64-encoded images and improve error messaging.

File-Level Changes

Change	Details	Files
Fix base64 image handling in buildImage function	Add early return for successfully decoded base64 images Update error message for invalid or missing image source	packages/flet/lib/src/utils/box.dart

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[sourcery-ai]

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

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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