Out-of-process rebuild: Add Plugin/PluginBridgeProcessor.h/.cpp — uses HelperConnection for crash-safe hosting

Source/Plugin/PluginBridgeProcessor.h

@@ -0,0 +1,68 @@
+#pragma once
+
+#include <juce_audio_processors/juce_audio_processors.h>
+#include <juce_dsp/juce_dsp.h>
+#include "HelperConnection.h"
+#include "McpServer.h"
+#include "../Shared/Constants.h"
+
+class PluginBridgeProcessor : public juce::AudioProcessor
+{
+public:
+    PluginBridgeProcessor();
+    ~PluginBridgeProcessor() override;
+
+    void prepareToPlay(double sampleRate, int samplesPerBlock) override;
+    void releaseResources() override;
+    void processBlock(juce::AudioBuffer<float>&, juce::MidiBuffer&) override;
+
+    juce::AudioProcessorEditor* createEditor() override;
+    bool hasEditor() const override { return true; }
+
+    const juce::String getName() const override { return "PluginBridge"; }
+    bool acceptsMidi() const override { return true; }
+    bool producesMidi() const override { return true; }
+    double getTailLengthSeconds() const override { return 0.0; }
+
+    int getNumPrograms() override { return 1; }
+    int getCurrentProgram() override { return 0; }
+    void setCurrentProgram(int) override {}
+    const juce::String getProgramName(int) override { return {}; }
+    void changeProgramName(int, const juce::String&) override {}
+
+    void getStateInformation(juce::MemoryBlock& destData) override;
+    void setStateInformation(const void* data, int sizeInBytes) override;
+
+    // Public access for Editor and McpServer
+    bool isMcpServerRunning() const;
+    int getMcpServerPort() const;
+    HelperConnection& getHelperConnection() { return helper; }
+
+    // Load/unload plugin (routes through helper process)
+    void loadPlugin(const juce::String& pluginPath);
+    void unloadPlugin();
+    void showPluginGui();
+
+    // Plugin state
+    bool isPluginLoaded() const { return pluginLoaded; }
+    juce::String getLoadedPluginName() const { return pluginName; }
+    int getLoadedPluginParamCount() const { return pluginParamCount; }
+    HelperConnection::State getConnectionState() const { return helper.getState(); }
+
+    // Plugin file listing (safe — no binary loading)
+    juce::Array<juce::File> getInstalledPluginFiles() const;
+
+private:
+    HelperConnection helper;
+    McpServer mcpServer;
+
+    bool pluginLoaded = false;
+    juce::String pluginName;
+    juce::String pluginPath;
+    int pluginParamCount = 0;
+
+    double currentSampleRate = 44100.0;
+    int currentBlockSize = 512;
+
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(PluginBridgeProcessor)
+};