feat: integrate real Carla host with JACK support and add plugin abstraction layer

client/src/tui.c

@@ -9,6 +9,7 @@
 #include <dirent.h>
 #include <sys/stat.h>
 #include <math.h>
+#include "carla_host.h"
 
 /* ---------- FIFO command helper ---------- */
 int send_command(const char *cmd) {
@@ -151,6 +152,8 @@ void tui_init(void) {
     /* initialise cell states to idle */
     for (int i = 0; i < GRID_ROWS * GRID_COLS; i++)
         cell_state[i] = STATE_IDLE;
+    /* open the JACK client used for Carla plugins */
+    carla_init_jack();
 }
 
 /* ---------- TUI run ---------- */
@@ -234,5 +237,7 @@ void tui_cleanup(void) {
     /* delete FIFOs */
     unlink(STATUS_FIFO);
     unlink(CMD_FIFO);
+    /* close the Carla JACK client */
+    carla_cleanup_jack();
     curs_set(1); endwin();
 }