Fix newly connected devices

[NullPointerDepressiveDisorder]

Description

Type of Change

• 🐛 Bug fix (non-breaking change that fixes an issue)
• ✨ New feature (non-breaking change that adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to change)
• 📚 Documentation update
• 🔧 Refactor (code change that neither fixes a bug nor adds a feature)
• 🧪 Test improvement

Related Issues

Testing Performed

• Tested with built-in trackpad
• Tested with Magic Trackpad (if available)
• Verified system gestures (Mission Control, etc.) still work
• Tested in target apps (list any specific apps tested):

Checklist

• My code follows the project's code style guidelines
• I have tested my changes thoroughly
• I have added comments for non-obvious logic
• My changes don't break existing functionality
• I have updated documentation if needed

Code Coverage

• I have added tests for new functionality (where applicable)
• My changes meet the 80% patch coverage requirement

Note: Codecov will automatically check patch coverage. PRs that don't meet the 80% threshold will fail the coverage check. Files in MiddleDragTests/, AppDelegate.swift, MiddleDragApp.swift, and UpdateManager.swift are excluded from coverage requirements.

Screenshots / Recordings

Additional Notes

[sentry]

⚠️ JUnit XML file not found

The CLI was unable to find any JUnit XML files to upload.
For more help, visit our troubleshooting guide.

[Copilot]

Pull request overview

This PR aims to fix detection/handling of newly connected multitouch devices (e.g., connecting a Magic Trackpad after the app is already running) by making device monitoring refresh periodically and by making device enumeration testable via dependency injection.

Changes:

• Added a periodic refresh timer to DeviceMonitor to re-enumerate devices while running and register newly connected devices.
• Introduced DeviceEnumerating + SystemDeviceEnumerator to abstract private MultitouchSupport calls for testability.
• Added mock-backed unit tests covering refresh timer lifecycle and registration behavior without requiring hardware.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
MiddleDrag/Managers/DeviceMonitor.swift	Adds refresh timer, enumerator injection, and new registration/refresh logic.
MiddleDrag/Core/MultitouchFramework.swift	Adds DeviceEnumerating protocol and SystemDeviceEnumerator implementation around private framework calls.
MiddleDrag/MiddleDragTests/DeviceMonitorTests.swift	Adds mock-backed tests for refresh/registration logic plus a MockDeviceEnumerator.

---

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