Move scroll buttons to title bar, add build info status bar

- Replace broken bottom waveform scroll buttons with title bar < > buttons
- Add scrollLeft()/scrollRight() methods to WaveformDisplay
- Add status bar showing git branch, commit, dirty state, and build timestamp
- Inject git version info via CMake at configure time
- Enable COPY_PLUGIN_AFTER_BUILD
- Increase baseHeight by 20px for status bar

Source/PluginEditor.h

@@ -41,11 +41,13 @@ private:
     juce::TextButton zoomInButton { "+" };
     juce::TextButton zoomOutButton { "-" };
     juce::TextButton zoomResetButton { "1:1" };
+    juce::TextButton scrollLeftButton { "<" };
+    juce::TextButton scrollRightButton { ">" };
     juce::ComboBox scaleComboBox;
     juce::ComboBox octaveComboBox;
 
     static constexpr int baseWidth = 1100;
-    static constexpr int baseHeight = 550;
+    static constexpr int baseHeight = 570;
 
     // Slice knobs
     juce::Slider bassSlider, trebleSlider, sensitivitySlider;
@@ -88,6 +90,7 @@ private:
     std::unique_ptr<ComboBoxAttachment> filterTypeAttachment;
 
     juce::FileChooser fileChooser { "Load Audio File", juce::File{}, "*.wav;*.aiff;*.flac;*.ogg" };
+    juce::Label statusBar;
 
     void setupSlider(juce::Slider& slider, juce::Label& label, const juce::String& name);
     void attachSlider(juce::Slider& slider, juce::Label& label, const juce::String& name,