chatgui: clean up log — remove spam, move messages to proper categories

A-B: Remove gui_bridge_post_uasync_fn log, MainWindow::onMessageReceived, InputBar send text
B1: Move lifecycle messages to GENERAL (utun_node, main, mainwindow, animtimer, sound_manager, messagelist, db_manager)
B2: Move chat events to CHAT_SYNC (MSG_RECEIVED, CHANNEL_UPDATED, CHANNEL_PEERS_ONLINE, DB_READY)
B3: Move peer/connect events to MEMBER_SYNC (CONNECT_RESULT, NEW_PEER, AUTO_CONNECT, NODE_CHANGED)
C: Lower level of C-side spam (recalc, send OK, PUSH ACK, connect_channel) INFO->DEBUG
D: Fix duplicate PUSH log line in db_sync.c
E: Add debounce to CHANNEL_PEERS_ONLINE — log only on change
Misc: Remove sort=0 from ChannelList::loadChannels, improve DB_READY message

tools/chatgui/src/inputbar.cpp

@@ -234,8 +234,6 @@ void InputBar::onSendClicked() {
         m_attachPreview->hide();
     }
     if (!text.isEmpty()) {
-        GUI_INFO("send: len=%d hasLF=%d text='%s'",
-                 text.length(), text.contains('\n'), qPrintable(text));
         emit sendMessage(text);
         m_input->clear();
         if (m_emojiPanel) m_emojiPanel->hide();