fix: add transport_state_to_string and clock_source_to_string to dispatcher

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

dispatcher.c

@@ -406,6 +406,27 @@ static void* dispatcher_thread_func(void *arg) {
     return NULL;
 }
 
+// ============================================================
+// Utility functions
+// ============================================================
+
+const char* transport_state_to_string(TransportState state) {
+    switch (state) {
+        case TRANSPORT_STOPPED: return "Stopped";
+        case TRANSPORT_PLAYING: return "Playing";
+        case TRANSPORT_PAUSED:  return "Paused";
+        default:                return "Unknown";
+    }
+}
+
+const char* clock_source_to_string(ClockSource source) {
+    switch (source) {
+        case CLOCK_SOURCE_INTERNAL: return "Internal";
+        case CLOCK_SOURCE_MIDI:     return "MIDI";
+        default:                    return "Unknown";
+    }
+}
+
 // ============================================================
 // Public API
 // ============================================================

dispatcher.h

@@ -158,6 +158,12 @@ void dispatcher_stop(void);
 // Get current state (thread-safe snapshot)
 AppState dispatcher_get_state(void);
 
+// ============================================================
+// Utility functions for state enums
+// ============================================================
+const char* transport_state_to_string(TransportState state);
+const char* clock_source_to_string(ClockSource source);
+
 // ============================================================
 // Reducer - pure function
 // ============================================================