[ZEPPELIN-6409] Use JavaScript click for Angular-rendered ng-click element

clickAndWait() times out because Selenium considers the Angular-compiled
ng-click div as not clickable (overlay/stale element during Angular digest).
Switch to visibilityWait + executeScript("arguments[0].click()") which
bypasses Selenium's clickability check and directly triggers the DOM click.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: jongyoul

zeppelin-integration/src/test/java/org/apache/zeppelin/integration/ZeppelinIT.java

@@ -37,6 +37,7 @@
 import org.openqa.selenium.Keys;
 import org.openqa.selenium.StaleElementReferenceException;
 import org.openqa.selenium.TimeoutException;
+import org.openqa.selenium.JavascriptExecutor;
 import org.openqa.selenium.WebElement;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -336,10 +337,13 @@ void testAngularRunParagraph() throws Exception {
       // Set new text value for 2nd paragraph
       setTextOfParagraph(2, "%sh echo NEW_VALUE");
 
-      // Click on 1 paragraph to trigger z.runParagraph() function
-
+      // Click on Angular-rendered div to trigger z.runParagraph() function.
+      // Use JavaScript click because Angular-compiled ng-click elements may not be
+      // considered "clickable" by Selenium's native click (overlay/stale issues).
+      WebElement angularDiv = visibilityWait(By.xpath(
+              getParagraphXPath(1) + "//div[@id=\"angularRunParagraph\"]"), MAX_BROWSER_TIMEOUT_SEC);
+      ((JavascriptExecutor) manager.getWebDriver()).executeScript("arguments[0].click();", angularDiv);
       ZeppelinITUtils.sleep(1000, false);
-      clickAndWait(By.xpath(getParagraphXPath(1) + "//div[@id=\"angularRunParagraph\"]"));
 
       waitForParagraph(2, "FINISHED");