add cookie_grabber extension; minor fixes to TMWebDriver/SOPs/simphtml

assets/cookie_grabber/content.js

@@ -0,0 +1,18 @@
+// content.js - MutationObserver 监听触发元素
+const TRIGGER_ID = '__ljqcg__';
+
+const obs = new MutationObserver(muts => {
+  for (const m of muts) {
+    for (const node of m.addedNodes) {
+      if (node.nodeType === 1 && node.id === TRIGGER_ID) {
+        chrome.runtime.sendMessage({type: 'getCookies'}, res => {
+          if (res && res.cookies) node.textContent = res.cookies;
+          else node.textContent = '__cg_error__';
+        });
+        return;
+      }
+    }
+  }
+});
+
+obs.observe(document.documentElement, {childList: true, subtree: true});