v1.1: Add New Band button and FIR quality selector

- New Band button in header bar for adding EQ nodes
- FIR latency dropdown: 4096 (~46ms), 8192 (~93ms), 16384 (~186ms)
- Version bump to 1.1

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Source/PluginEditor.h

@@ -39,10 +39,14 @@ private:
     NodeParameterPanel nodePanel;
 
     juce::Label titleLabel { {}, "INSTALPEQ" };
-    juce::Label versionLabel { {}, "v1.0" };
+    juce::Label versionLabel { {}, "v1.1" };
     juce::ToggleButton bypassToggle;
     juce::Label bypassLabel { {}, "BYPASS" };
 
+    juce::TextButton newBandButton { "NEW BAND" };
+    juce::ComboBox qualitySelector;
+    juce::Label qualityLabel { {}, "FIR" };
+
     juce::Slider masterGainSlider;
     juce::Label masterGainLabel { {}, "MASTER" };