wip: STCP TCP chat integration — diagnostics, invite TCP fallback, test infra

src/utun_instance.c

@@ -16,6 +16,7 @@
 #include "chat/db_sync.h"
 #include "chat/chat_core.h"
 #include "chat/chat_sync.h"
+#include "chat/chat_headless_control.h"
 #include "stcp_server.h"
 #include "control_server.h"
 #include "transport_layer/node_conn_direct.h"
@@ -472,6 +473,7 @@ void utun_instance_destroy(struct UTUN_INSTANCE *instance) {
     DEBUG_INFO(DEBUG_CATEGORY_SYS, "[DESTROY] G done — ETCP sockets");
 
     /* Phase H: chat */
+    chat_headless_control_destroy();
     chat_sync_destroy(instance);
     chat_core_destroy(instance);
     DEBUG_INFO(DEBUG_CATEGORY_SYS, "[DESTROY] H done — chat");
@@ -710,6 +712,20 @@ int utun_instance_init(struct UTUN_INSTANCE *instance) {
         }
     }
     
+    // Initialize headless chat control if configured in [chatserver]
+    if (instance->config->global.headless_control_bind[0] != '\0') {
+        char ip_str[64] = "127.0.0.1"; int port = 9999;
+        const char* colon = strrchr(instance->config->global.headless_control_bind, ':');
+        if (colon) {
+            size_t ip_len = (size_t)(colon - instance->config->global.headless_control_bind);
+            if (ip_len < sizeof(ip_str)) { memcpy(ip_str, instance->config->global.headless_control_bind, ip_len); ip_str[ip_len] = '\0'; }
+            port = atoi(colon + 1);
+            if (port <= 0 || port > 65535) port = 9999;
+        }
+        if (chat_headless_control_init(instance->ua, instance, ip_str, port) != 0)
+            DEBUG_WARN(DEBUG_CATEGORY_GENERAL, "Failed to init headless chat control (non-fatal)");
+    }
+    
     // Start the main loop
     instance->running = 1;