dm: прямой обмен сообщениями (DM) + soundtouch + архитектура звонков

- src/dm/: dm_core/dm_crypto/dm_mailbox — прямой обмен сообщениями (DM)
- lib/soundtouch-master/: vendored SoundTouch (изменение темпа/высоты аудио)
- doc/dm_arch.md, doc/chat_call_arch.md: архитектура DM и звонков
- tests: test_dm.c, test_dm_e2e.c
- chat: рефакторинг chat_* модулей, member_sync, invite_build
- chatgui/chatgui-android: синхронизация с новым API чата
- lib/u_async, debug_config, utun_instance: сопутствующие изменения

src/chat/member_sync.c

@@ -240,25 +240,25 @@ static int _member_get_items(void* ctx, const char* ns, uint8_t level,
 /* ── node_props_changed (adm_tags) callbacks ── */
 
 struct ms_props_cbk { node_props_changed_fn fn; void* arg; struct ms_props_cbk* next; };
-static struct ms_props_cbk* g_props_cbks = NULL;
 
-static void _fire_props_changed(uint64_t node_id, const char* adm_tags, const char* channel_id) {
-    struct ms_props_cbk* pc = g_props_cbks;
+static void _fire_props_changed(struct UTUN_INSTANCE* inst, uint64_t node_id, const char* adm_tags, const char* channel_id) {
+    if (!inst || !CC(inst)) return;
+    struct ms_props_cbk* pc = CC(inst)->props_cbks;
     while (pc) { pc->fn(node_id, adm_tags, channel_id, pc->arg); pc = pc->next; }
 }
 
-void member_sync_add_props_cbk(node_props_changed_fn fn, void* arg) {
-    if (!fn) return;
+void member_sync_add_props_cbk(struct UTUN_INSTANCE* inst, node_props_changed_fn fn, void* arg) {
+    if (!inst || !fn || !CC(inst)) return;
     struct ms_props_cbk* e = u_malloc(sizeof(*e));
     if (!e) return;
     e->fn = fn; e->arg = arg;
-    e->next = g_props_cbks;
-    g_props_cbks = e;
+    e->next = CC(inst)->props_cbks;
+    CC(inst)->props_cbks = e;
 }
 
-void member_sync_remove_props_cbk(node_props_changed_fn fn, void* arg) {
-    if (!fn) return;
-    struct ms_props_cbk** p = &g_props_cbks;
+void member_sync_remove_props_cbk(struct UTUN_INSTANCE* inst, node_props_changed_fn fn, void* arg) {
+    if (!inst || !fn || !CC(inst)) return;
+    struct ms_props_cbk** p = &CC(inst)->props_cbks;
     while (*p) {
         if ((*p)->fn == fn && (*p)->arg == arg) {
             struct ms_props_cbk* r = *p;
@@ -272,27 +272,27 @@ void member_sync_remove_props_cbk(node_props_changed_fn fn, void* arg) {
 /* ── Коллбэк применения рекорда мембера (ready-хендлинг join на connection-узле) ── */
 
 struct ms_apply_cbk { member_apply_cbk_fn fn; void* arg; struct ms_apply_cbk* next; };
-static struct ms_apply_cbk* g_apply_cbks = NULL;
 
-static void _fire_apply_cbk(const char* ch_id, uint64_t node_id,
+static void _fire_apply_cbk(struct UTUN_INSTANCE* inst, const char* ch_id, uint64_t node_id,
                             const uint8_t* x25519, uint64_t signed_by,
                             const uint8_t* signature) {
-    struct ms_apply_cbk* ac = g_apply_cbks;
+    if (!inst || !CC(inst)) return;
+    struct ms_apply_cbk* ac = CC(inst)->apply_cbks;
     while (ac) { ac->fn(ch_id, node_id, x25519, signed_by, signature, ac->arg); ac = ac->next; }
 }
 
-void member_sync_add_apply_cbk(member_apply_cbk_fn fn, void* arg) {
-    if (!fn) return;
+void member_sync_add_apply_cbk(struct UTUN_INSTANCE* inst, member_apply_cbk_fn fn, void* arg) {
+    if (!inst || !fn || !CC(inst)) return;
     struct ms_apply_cbk* e = u_malloc(sizeof(*e));
     if (!e) return;
     e->fn = fn; e->arg = arg;
-    e->next = g_apply_cbks;
-    g_apply_cbks = e;
+    e->next = CC(inst)->apply_cbks;
+    CC(inst)->apply_cbks = e;
 }
 
-void member_sync_remove_apply_cbk(member_apply_cbk_fn fn, void* arg) {
-    if (!fn) return;
-    struct ms_apply_cbk** p = &g_apply_cbks;
+void member_sync_remove_apply_cbk(struct UTUN_INSTANCE* inst, member_apply_cbk_fn fn, void* arg) {
+    if (!inst || !fn || !CC(inst)) return;
+    struct ms_apply_cbk** p = &CC(inst)->apply_cbks;
     while (*p) {
         if ((*p)->fn == fn && (*p)->arg == arg) {
             struct ms_apply_cbk* r = *p;
@@ -329,7 +329,7 @@ static void _ms_on_bgp_node(struct TOPO_GROUP* group, uint64_t node_id, int even
 
     DEBUG_DEBUG(DEBUG_CATEGORY_MEMBER_SYNC, "%s: bgp_node ev=%d nid=0x%016llx tags=%s",
                 MS_ID, event, (unsigned long long)node_id, tags);
-    _fire_props_changed(node_id, tags[0] ? tags : NULL, group->channel_id);
+    _fire_props_changed(inst, node_id, tags[0] ? tags : NULL, group->channel_id);
 }
 
 static int _sig_is_zero64(const uint8_t* sig) {
@@ -840,13 +840,9 @@ static int _member_apply_items(void* ctx, const char* ns, uint64_t from_peer,
         if (r & MS_APPLY_CHANGED) {
             changed_count++;
             /* fire node_props_changed callbacks */
-            struct ms_props_cbk* pc = g_props_cbks;
-            if (pc) {
-                const char* tags_final = atags[0] ? atags : NULL;
-                while (pc) { pc->fn(nid, tags_final, ns, pc->arg); pc = pc->next; }
-            }
+            _fire_props_changed(inst, nid, atags[0] ? atags : NULL, ns);
             /* fire apply callbacks (ready-хендлинг join на connection-узле) */
-            _fire_apply_cbk(ns, nid, x25, sb, sgn);
+            _fire_apply_cbk(inst, ns, nid, x25, sb, sgn);
         }
         if (r & MS_APPLY_STALE) {
             /* у нас версия новее — отправить наш полный рекорд автору */