Prevent Watch Expression creation for empty snippets

Avoid adding Watch Expressions when the input snippet is empty. This
prevents unnecessary entries from appearing in the Expressions view and
improves overall usability.

Author: SougandhS

org.eclipse.jdt.debug.ui/ui/org/eclipse/jdt/internal/debug/ui/actions/WatchAction.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2000, 2012 IBM Corporation and others.
+ * Copyright (c) 2000, 2025 IBM Corporation and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
@@ -54,6 +54,9 @@ public void run() {
 	}
 
 	private void createWatchExpression(String snippet) {
+		if (snippet.isEmpty()) {
+			return;
+		}
 		IWatchExpression expression= DebugPlugin.getDefault().getExpressionManager().newWatchExpression(snippet);
 		DebugPlugin.getDefault().getExpressionManager().addExpression(expression);
 		IAdaptable object = DebugUITools.getDebugContext();