fix: Buttons padding

[dwesolow]

📝 Description

✨ Type of Change

Fix open-edge-platform/training_extensions#6382

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• 🐞 Bug fix – Non-breaking change which fixes an issue
• 🚀 New feature – Non-breaking change which adds functionality
• 🔨 Refactor – Non-breaking change which refactors the code base
• 💥 Breaking change – Changes that break existing functionality
• 📚 Documentation update
• 🔒 Security update
• 🧪 Tests

🧪 Testing Scenarios

Describe how the changes were tested and how reviewers can test them too:

• ✅ Tested manually
• 🤖 Run automated end-to-end tests

✅ Checklist

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• 🔍 PR title is clear and meaningful
• ✍️ PR description clearly explains the changes and their reason
• 📝 I have linked the PR to the corresponding GitHub Issues, if any
• 💬 I have commented my code, especially in hard-to-understand areas
• 📄 I have made corresponding changes to the documentation
• ✅ I have added tests that prove my fix is effective or my feature works

[Copilot]

Pull request overview

This PR addresses inconsistent vertical padding on the shared UI Button wrapper by applying a local CSS module class to the underlying React Spectrum Button, aligning it with the expected spacing (per linked issue #6382).

Changes:

• Added a .button style in button.module.scss to enforce vertical padding via Spectrum dimension tokens.
• Updated Button to always apply the new base class via UNSAFE_className, while preserving any caller-provided UNSAFE_className.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
web_ui/packages/ui/src/button/button.module.scss	Introduces a base .button class to set vertical padding for buttons.
web_ui/packages/ui/src/button/button.component.tsx	Applies the base .button class to SpectrumButton and merges it with any existing UNSAFE_className.

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[jpggvilaca]

screenshot? :D

[dwesolow]

screenshot? :D

Yeah, forgot. Updated PR description.