修复一些小错误

ui/pages/judge_playground.page.js

@@ -5,9 +5,8 @@ import * as recordEnum from 'vj/constant/record';
 const page = new NamedPage('judge_playground', async () => {
   const { default: SockJs } = await import('sockjs-client');
 
-  const sock = new SockJs('/judge/consume-conn');
+  const sock = new SockJs(`/judge/consume-conn?token=${ UIContext.csrfToken }`);
   sock.onopen = () => {
-    sock.send(document.cookie);
     const div = $('<div class="section visible">').appendTo('#messages');
     $('<div class="section__header"><h1 class="section__title">Connection opened.</h1></div>')
       .appendTo(div);

ui/pages/problem_detail.page.js

@@ -168,9 +168,6 @@ const page = new NamedPage(['problem_detail', 'contest_detail_problem', 'homewor
     } = await loadReactRedux(ScratchpadReducer);
 
     const sock = new SockJs(Context.socketUrl);
-    sock.onopen = () => {
-      sock.send(document.cookie);
-    };
     sock.onmessage = (message) => {
       const msg = JSON.parse(message.data);
       store.dispatch({

ui/pages/record_detail.page.js

@@ -6,9 +6,6 @@ const page = new NamedPage('record_detail', async () => {
 
   const sock = new SockJs(Context.socketUrl);
   const dd = new DiffDOM();
-  sock.onopen = () => {
-    sock.send(document.cookie);
-  };
   sock.onmessage = (message) => {
     const msg = JSON.parse(message.data);
     const newStatus = $(msg.status_html);

ui/pages/record_main.page.js

@@ -9,10 +9,7 @@ const page = new NamedPage('record_main', async () => {
   const dd = new DiffDOM();
 
   sock.onopen = () => {
-    sock.send(document.cookie);
-    setTimeout(() => {
-      sock.send(JSON.stringify({ rids: Context.rids }));
-    }, 300);
+    sock.send(JSON.stringify({ rids: Context.rids }));
   };
   sock.onmessage = (message) => {
     const msg = JSON.parse(message.data);