fix: add missing QUEUED_TRIGGER_POOL_SIZE define to engine.h

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

engine.h

@@ -42,6 +42,12 @@ typedef struct {
 // Maximum number of queued commands from frontend to audio thread
 #define MAX_QUEUED_COMMANDS 64
 
+// Size of the pre-allocated trigger pool (must match engine.c)
+#define QUEUED_TRIGGER_POOL_SIZE 64
+
+// Size of the pre-allocated trigger pool (must match engine.c)
+#define QUEUED_TRIGGER_POOL_SIZE 64
+
 typedef enum {
     CMD_TRIGGER_CLIP,
     CMD_TRIGGER_SCENE,