fix

Author: wankai123

docs/en/api/browser-protocol.md

@@ -55,7 +55,7 @@ Input:
   "pagePath": "/index.html",
   "fmpTime": 10, // Deprecated since skywalking-client-js 1.0. This is no longer recommended. Please use the `useWebVitals` instead.
   /* NOTE, Safari does not support all core web vitals, and Firefox does not support `CLS`. */
-  "clsTime": 0.1,
+  "cls": 0.1,
   "lcpTime": 10,
 }
 ```

oap-server/server-receiver-plugin/skywalking-browser-receiver-plugin/src/main/java/org/apache/skywalking/oap/server/receiver/browser/provider/parser/performance/listener/BrowserWebVitalsPerfDataAnalysisListener.java

@@ -49,8 +49,8 @@ public void parse(BrowserWebVitalsPerfDataDecorator decorator) {
         browserAppWebVitalsPerf.setServiceName(namingControl.formatServiceName(decorator.getService()));
         browserAppWebVitalsPerf.setPath(namingControl.formatEndpointName(browserAppWebVitalsPerf.getServiceName(), decorator.getPagePath()));
         browserAppWebVitalsPerf.setFmpTime(decorator.getFmpTime());
-        // Make CLS multiply 1000 to convert to int from double
-        // MQE should divide it by 1000 while querying
+        // CLS values are typically between 0 and 1. Multiplying by 1000 allows storage as an integer
+        // while preserving 3 decimal places of precision. When querying, divide by 1000 to restore the original value.
         browserAppWebVitalsPerf.setCls((int) Math.round(decorator.getCls() * 1000));
         browserAppWebVitalsPerf.setLcpTime(decorator.getLcpTime());
     }