chat: права админа + member tags (verified/deleted) + ncd revive

- chat_admin: передача канальных privkey другому узлу (encrypted+signed,
  ETCP_RT_ID_ADMIN_KEY), событие ADMIN_KEY_RECEIVED
- member_sync/bridge: tags verified/deleted, is_channel_owner, transfer_admin
  (android JNI + chatgui memberpropsdialog)
- node_conn_direct: оживление timed_out entry — обновление линков в существующем
  conn (убрать старые, добавить новые) + немедленная очистка не поднявшегося
  conn без fin_wait — фикс invite/reconnect

tools/chatgui/src/mainwindow.cpp

@@ -334,6 +334,20 @@ void MainWindow::setupBridgeCallbacks() {
         QString chId = QString::fromUtf8(ch_id, ch_id_len);
         s_mainWindow->m_messageList->updateMessageProgress(chId, msg_id, blocks_done, num_blocks);
     });
+    gui_bridge_set_admin_key_received_cb([](const uint8_t* data, int len) {
+        if (!s_mainWindow || len < 2) return;
+        uint8_t chLen = data[0];
+        if (len < 1 + chLen + 8) return;
+        QString chId = QString::fromUtf8((const char*)data + 1, chLen);
+        uint64_t from; memcpy(&from, data + 1 + chLen, 8);
+        s_mainWindow->m_trayIcon->showMessage(
+            "vibechat",
+            QStringLiteral("You are now a channel co-owner.\nReceived admin key for channel %1 from 0x%2")
+                .arg(chId).arg(QString::number(from, 16)),
+            QSystemTrayIcon::Information, 5000);
+        if (s_mainWindow->m_currentChannelId == chId)
+            s_mainWindow->m_accountList->setChannel(chId);
+    });
 }
 
 void MainWindow::setupConnects() {