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/background.js

@@ -0,0 +1,25 @@
+// background.js - service worker
+const events = [];
+let recording = false;
+let activeTabId = null;
+
+chrome.runtime.onMessage.addListener((msg, sender, sendResponse) => {
+  if (msg.action === 'startRecording') {
+    events.length = 0;
+    recording = true;
+    activeTabId = msg.tabId;
+    chrome.tabs.sendMessage(msg.tabId, { action: 'startRecord' });
+    sendResponse({ ok: true });
+  } else if (msg.action === 'stopRecording') {
+    recording = false;
+    chrome.tabs.sendMessage(activeTabId, { action: 'stopRecord' });
+    sendResponse({ ok: true, eventCount: events.length });
+  } else if (msg.action === 'getEvents') {
+    sendResponse({ events: events });
+  } else if (msg.action === 'event') {
+    events.push(msg.data);
+  } else if (msg.action === 'getStatus') {
+    sendResponse({ recording, eventCount: events.length });
+  }
+  return true;
+});