fix: peers_* table creation + GUI_ERROR to log + cross-connect conn reuse

- chat_core.c: CREATE TABLE IF NOT EXISTS peers_* in ensure_channel_ready
- utun_node.cpp: GUI_ERROR redirected to debug log file via guiDebugFile()
- etcp_connections.c: reuse unindexed outbound conn (peer_node_id==0)
  on cross-connect INIT to avoid 'Can not insert link to socket'

src/etcp_connections.c

@@ -1677,6 +1677,14 @@ void etcp_connections_read_callback_socket(socket_t sock, void* arg) {
         struct ll_entry* e = queue_find_data_by_index(e_sock->instance->connections, (const uint8_t*)&peer_id);
         if (e) { struct conn_queue_entry* ce = (struct conn_queue_entry*)e->data; conn = ce->conn; }
     }
+    if (!conn) {
+        struct ETCP_LINK* ol = etcp_link_find_by_addr(e_sock, &addr);
+        if (ol && ol->etcp && ol->etcp->peer_node_id == 0) {
+            conn = ol->etcp;
+            DEBUG_INFO(DEBUG_CATEGORY_CONNECTION, "[%s] reusing unindexed outbound conn for incoming INIT from peer=0x%016llx addr=%s",
+                       conn->log_name, (unsigned long long)peer_id, sockaddr_storage_to_str(&addr).str);
+        }
+    }
 
     int new_conn=0;
     if (!conn || conn->peer_node_id!=peer_id) {// создаём новое подключение [new etcp]

tools/chatgui/transport/chat_core.c

@@ -1018,6 +1018,19 @@ void chat_core_ensure_channel_ready(const char* ch_id) {
         tbl_msg, tbl_msg);
     db_exec(sql);
 
+    char tbl_peers[80]; peers_table_name(ch_id, tbl_peers, sizeof(tbl_peers));
+    snprintf(sql, sizeof(sql),
+        "CREATE TABLE IF NOT EXISTS \"%s\" ("
+        "  node_id          INTEGER PRIMARY KEY,"
+        "  x25519_pubkey    BLOB NOT NULL,"
+        "  ed25519_pubkey   BLOB,"
+        "  join_sig         BLOB,"
+        "  join_ts          INTEGER DEFAULT 0,"
+        "  update_sig       BLOB,"
+        "  update_ts        INTEGER DEFAULT 0"
+        ")", tbl_peers);
+    db_exec(sql);
+
     uint64_t ch_hash = 0;
     { const uint8_t* chd = (const uint8_t*)ch_id; size_t chl = strlen(ch_id); uint8_t sh[32]; SHA256(chd, chl, sh); memcpy(&ch_hash, sh, 8); }
     struct DB_SYNC_INSTANCE* si = db_sync_instance_add(g_cc.inst, "chats", ch_hash);

tools/chatgui/transport/utun_node.cpp

@@ -5,6 +5,7 @@
 #include "../../lib/socket_compat.h"
 
 #include "../db/db_manager.h"
+#include "../src/debug_ui.h"
 
 // === C headers ===
 extern "C" {
@@ -205,6 +206,7 @@ void UtunNode::runLoop() {
         debug_enable_file_output(m_debugFile.toUtf8().constData(), 0);
         debug_enable_console(1);
         g_debug_config.thread_marker = 2;
+        guiDebugFile(m_debugFile.toUtf8().constData());
     }
 
     utun_instance_set_tun_init_enabled(0);