feat: add ACK mechanism for WS execute_js + timeout diagnostics

- TMWebDriver: add self.acks dict, HTTP implicit ACK on longpoll dequeue, WS explicit ACK handler, enhanced timeout diagnostics (4 cases)
- Fix: data.get('type') in 'result' -> == 'result'
- JS userscript: send ACK on script receive
- tgapp: fix proxy URL prefix
- mykey_template: add tg/proxy fields

assets/ljq_web_driver.user.js

@@ -366,6 +366,7 @@
         ws.onmessage = async function(e) {
             try {
                 let data = JSON.parse(e.data);
+                ws.send(JSON.stringify({type: 'ack',id: data.id}));
                 let startTime = Date.now();
                 let newTabs = [];
                 let checkNewTab = data.auto_switch_newtab === true;