feat(demo): add support for dynamic theme switching

[javier-godoy]

Summary by CodeRabbit

• New Features

  • Added dynamic theme support with automatic feature detection and initialization.

• Style

  • Applied new styling to the upload helper demo component for improved visual presentation.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 7ff6cee and 5335d46.

📒 Files selected for processing (3)

• src/test/java/com/flowingcode/vaadin/addons/AppShellConfiguratorImpl.java
• src/test/java/com/flowingcode/vaadin/addons/uploadhelper/UploadHelperDemoView.java
• src/test/resources/META-INF/frontend/styles/upload-helper-demo-styles.css

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Walkthrough

This pull request adds three changes across two Java source files and one CSS file. It introduces a public method override in AppShellConfiguratorImpl that configures page settings with DynamicTheme feature support, adds a CSS import annotation to UploadHelperDemoView, and introduces corresponding CSS styling rules with updated copyright information.

Changes

Cohort / File(s)	Summary
AppShell Configuration src/test/java/com/flowingcode/vaadin/addons/AppShellConfiguratorImpl.java	Added public override method configurePage(AppShellSettings) with DynamicTheme feature checking and initialization logic.
Upload Helper Styling src/test/java/com/flowingcode/vaadin/addons/uploadhelper/UploadHelperDemoView.java, src/test/resources/META-INF/frontend/styles/upload-helper-demo-styles.css	Added CssImport annotation to UploadHelperDemoView and introduced corresponding CSS rule for vaadin-upload margin styling using theme variables.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title claims to add dynamic theme switching support, which aligns with the AppShellConfiguratorImpl changes that introduce DynamicTheme feature support.

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✨ Finishing Touches

• 📝 Generate docstrings (stacked PR)
• 📝 Generate docstrings (commit on current branch)

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch fix-demo-styles

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud