feat: add parallel MIDI grid with separate clip storage and view toggle

Co-authored-by: aider (deepseek/deepseek-coder) <aider@aider.chat>

dispatcher.h

@@ -46,6 +46,22 @@ typedef enum {
     CLOCK_SOURCE_MIDI
 } ClockSource;
 
+typedef struct {
+    uint8_t note;
+    uint8_t velocity;
+    uint32_t timestamp;  // sample offset within the clip
+} MidiEvent;
+
+#define MAX_MIDI_EVENTS 44100  // ~1 second of dense MIDI data
+
+typedef struct {
+    ClipState state;
+    MidiEvent events[MAX_MIDI_EVENTS];
+    int event_count;
+    int read_index;
+    char channel_name[64];  // per-channel name for MIDI grid
+} MidiClip;
+
 typedef struct {
     ClipState state;
     float *buffer;
@@ -73,6 +89,11 @@ typedef struct {
     // Clips
     Clip clips[MAX_CLIPS];
     
+    // MIDI clips (separate grid)
+    MidiClip midi_clips[MAX_CLIPS];
+    bool show_midi_grid;             // View toggle: true = MIDI grid, false = Audio grid
+    char channel_names[MAX_CHANNELS][64];  // Channel names for audio grid
+    
     // Undo history
     struct {
         int undo_index;
@@ -126,7 +147,11 @@ typedef enum {
     ACTION_SAVE_PROJECT,
     ACTION_LOAD_PROJECT,
     ACTION_PROCESS_AUDIO,
-    ACTION_QUIT
+    ACTION_QUIT,
+    ACTION_SET_SHOW_MIDI_GRID,
+    ACTION_MIDI_CLIP_TRIGGER,
+    ACTION_MIDI_CLIP_RESET,
+    ACTION_SET_CHANNEL_NAME
 } ActionType;
 
 typedef struct {
@@ -151,6 +176,10 @@ typedef struct {
         struct { char filename[512]; } save_project;
         struct { char filename[512]; } load_project;
         struct { jack_nframes_t nframes; } process_audio;
+        struct { bool show; } set_show_midi_grid;
+        struct { int clip_index; } midi_clip_trigger;
+        struct { int clip_index; } midi_clip_reset;
+        struct { int channel; char name[64]; } set_channel_name;
     } data;
 } Action;