Initial commit of Tmall new-product analysis loop v9.2.5.

Co-authored-by: Cursor <cursoragent@cursor.com>

collector-extension-standalone/page_bridge.js

@@ -0,0 +1,6 @@
+window.addEventListener('message',event=>{
+  if(event.source!==window||event.data?.type!=='SANSONG_COLLECTOR_PING')return
+  chrome.runtime.sendMessage({type:'SANSONG_COLLECTOR_WAKE'},response=>{
+    window.postMessage({type:'SANSONG_COLLECTOR_PONG',requestId:event.data.requestId,installed:true,version:chrome.runtime.getManifest().version,connected:Boolean(response?.connected)},'*')
+  })
+})