Add SuperRPA integration guide, simple extension and standalone replay page

- docs/integration/superrpa-integration.zh_CN.md: complete integration guide
- rrweb-simple-ext/: minimal Chrome extension for page recording
- replay.html: standalone drag-and-drop replay viewer
- CLAUDE.md: project instructions

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

rrweb-simple-ext/content.js

@@ -0,0 +1,46 @@
+// content.js - content script (runs in content script world)
+(function() {
+  // Inject the record library + inject script into page
+  function loadScripts(callback) {
+    // Load record.umd.cjs first
+    const script1 = document.createElement('script');
+    script1.src = chrome.runtime.getURL('record.umd.cjs');
+    script1.onload = function() {
+      script1.remove();
+      // Then load inject.js
+      const script2 = document.createElement('script');
+      script2.src = chrome.runtime.getURL('inject.js');
+      script2.onload = function() {
+        script2.remove();
+      };
+      (document.head || document.documentElement).appendChild(script2);
+    };
+    (document.head || document.documentElement).appendChild(script1);
+  }
+
+  // Listen for messages from inject.js (page context)
+  window.addEventListener('message', function(event) {
+    if (event.source !== window) return;
+    const data = event.data;
+    if (!data || !data.__rrweb_action) return;
+
+    if (data.__rrweb_action === 'event') {
+      // Forward event to background
+      chrome.runtime.sendMessage({ action: 'event', data: data.__rrweb_data });
+    }
+  });
+
+  // Listen for messages from background
+  chrome.runtime.onMessage.addListener(function(msg, sender, sendResponse) {
+    if (msg.action === 'startRecord') {
+      loadScripts();
+      sendResponse({ ok: true });
+    } else if (msg.action === 'stopRecord') {
+      window.postMessage({ __rrweb_action: 'stop' }, '*');
+      sendResponse({ ok: true });
+    }
+    // Don't return true for unrelated messages
+  });
+
+  console.log('[rrweb] Content script loaded');
+})();