Fix macOS build error: remove juce::Graphics::getCurrentColour() call

[Copilot]

Description

juce::Graphics does not expose getCurrentColour() in JUCE 7.0.9, causing a hard compile error on macOS. Replace the two-step colour lookup with an explicit local variable computed from the same source values.

Before:

g.setColour(button.getToggleState() ? matrixGreen : matrixGray);
if (shouldDrawButtonAsHighlighted)
    g.setColour(g.getCurrentColour().brighter(0.2f));

After:

auto textColour = button.getToggleState() ? matrixGreen : matrixGray;
if (shouldDrawButtonAsHighlighted)
    textColour = textColour.brighter (0.2f);
g.setColour (textColour);

Behavior is identical; only the non-existent API call is removed.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Performance improvement
• Code refactoring

Testing

• Tested in DAW (specify which one):
• Verified VST3 functionality
• Verified AU functionality (macOS only)
• Tested on platform(s): macOS (JUCE 7.0.9)

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published

Screenshots (if applicable)

[Copilot]

Pull request overview

Removes usage of the non-existent juce::Graphics::getCurrentColour() API (JUCE 7.0.9) by computing the intended text colour locally before setting it, resolving a macOS compile error.

Changes:

• Replace getCurrentColour().brighter(...) with a local textColour variable that is optionally brightened.
• Consolidate text colour selection into a single g.setColour(...) call.

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[Copilot]

Spacing around parentheses is inconsistent with the surrounding method calls in this file (e.g., g.setColour(matrixGreen) / textColour.brighter(…)). Consider removing the extra spaces in textColour.brighter (0.2f) and g.setColour (textColour) to match the local style and reduce diff noise.

Suggested change

	textColour = textColour.brighter (0.2f);
	g.setColour (textColour);
	textColour = textColour.brighter(0.2f);
	g.setColour(textColour);