Apply conservative Rector cleanup

[dereuromark]

Cleanup-only Rector follow-up PR. No Rector dependency or config is added here; this keeps the branch focused on conservative code cleanup only.

[Copilot]

Pull request overview

Conservative Rector/PHPCS cleanup pass across the plugin, modernizing some PHP syntax and doing small refactors while aiming to preserve behavior.

Changes:

• Modernized PHP syntax (e.g., str_starts_with(), match, catch without variable, ternaries) and simplified return paths.
• Minor refactors in captcha validation helpers/behaviors and math rendering.
• Small static-analysis/docblock adjustments in controller code.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tests/schema.php	Uses catch without an unused exception variable during fixture schema reflection.
tests/bootstrap.php	Simplifies Windows detection using str_starts_with().
src/View/Helper/CaptchaHelper.php	Simplifies render return concatenation for passive honeypot field output.
src/Model/Behavior/PassiveCaptchaBehavior.php	Adjusts logging string concatenation in honeypot validation rule.
src/Model/Behavior/CaptchaBehavior.php	Simplifies min/max time comparisons and minor UUID empty check refactor.
src/Engine/MathEngine.php	Refactors image output selection to match within output buffering.
src/Engine/Math/SimpleMath.php	Collapses arithmetic branch to a ternary expression.
src/Controller/CaptchaController.php	Adds inline docblock type annotation for $captcha.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[codecov-commenter]

⚠️ Please install the to ensure uploads and comments are reliably processed by Codecov.

Codecov Report

❌ Patch coverage is 90.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 86.92%. Comparing base (dc0db99) to head (2bb20a6).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/Engine/MathEngine.php	80.00%	1 Missing ⚠️
❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@             Coverage Diff              @@
##             master      #55      +/-   ##
============================================
- Coverage     86.94%   86.92%   -0.03%     
+ Complexity      232      231       -1     
============================================
  Files            18       18              
  Lines           789      780       -9     
============================================
- Hits            686      678       -8     
+ Misses          103      102       -1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.