call: P2P аудиозвонки — сигналинг, релей медиа, аудио-контур, headless/desktop/android

- src/call/: сигналинг (call.c, call_proto.h, ETCP_RT_ID_CALL 0x36) + релей медиа
  + headless аудио-сокет (call_headless.c, call_audio_bind) + Opus/jitter/тоны
- chat: события CHAT_EVT_CALL_* (34–40), CHAT_EVT_DM_MESSAGES (41), DM-трамплины
- chatgui: call window, miniaudio I/O, audio_frame_ring, test_audio_jitter
- chatgui-android: CallScreen/IncomingCallDialog, аудио-роутинг, JNI, рингтон
- tests: test_call, test_call_headless

src/utun_instance.c

@@ -20,6 +20,8 @@
 #include "chat/chat_headless_control.h"
 #include "dm/dm_core.h"
 #include "dm/dm_mailbox.h"
+#include "call/call.h"
+#include "call/call_headless.h"
 #include "broadcast.h"
 #include "stcp_server.h"
 #include "control_server.h"
@@ -490,6 +492,8 @@ void utun_instance_destroy(struct UTUN_INSTANCE *instance) {
     chat_media_startup_backfill_destroy(instance);
     dm_mailbox_destroy(instance);
     dm_core_destroy(instance);
+    call_headless_destroy(instance);
+    call_destroy(instance);
     chat_sync_destroy(instance);
     chat_core_destroy(instance);
     DEBUG_INFO(DEBUG_CATEGORY_SYS, "[DESTROY] H done — chat");
@@ -686,6 +690,7 @@ int utun_instance_init(struct UTUN_INSTANCE *instance) {
             /* dm_mailbox до dm_core: dm_core_init ставит deliver-cb в mailbox */
             dm_mailbox_init(instance);
             dm_core_init(instance);
+            call_init(instance);
         }
     }
 
@@ -758,6 +763,20 @@ int utun_instance_init(struct UTUN_INSTANCE *instance) {
         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)");
     }
+
+    // Initialize headless call audio socket if configured in [chatserver]
+    if (instance->config->global.call_audio_bind[0] != '\0') {
+        char ip_str[64] = "127.0.0.1"; int port = 10001;
+        const char* colon = strrchr(instance->config->global.call_audio_bind, ':');
+        if (colon) {
+            size_t ip_len = (size_t)(colon - instance->config->global.call_audio_bind);
+            if (ip_len < sizeof(ip_str)) { memcpy(ip_str, instance->config->global.call_audio_bind, ip_len); ip_str[ip_len] = '\0'; }
+            port = atoi(colon + 1);
+            if (port <= 0 || port > 65535) port = 10001;
+        }
+        if (call_headless_init(instance->ua, instance, ip_str, port) != 0)
+            DEBUG_WARN(DEBUG_CATEGORY_GENERAL, "Failed to init headless call audio socket (non-fatal)");
+    }
     
     // Start the main loop
     instance->running = 1;