Still cannot show Javadoc while mouse hover on class

### Apache NetBeans version

Apache NetBeans 24

### What happened

Javadoc still does not automatically pop up when the mouse hovers over a class or something like that. I cannot confirm which version has been happened but I can confirm this has long time.

### Language / Project Type / NetBeans Component

Java Maven/Gradle (Even the Ant example project)

### How to reproduce

Just move the mouse hover the class you want to show the javadoc. Only if you press Ctrl+Space the Javadoc can show.

### Did this work correctly in an earlier version?

No / Don't know

### Operating System

Windows10 / Linux (OpenSUSE)

### JDK

JDK21 provided by OpenJDK(Bellsw or OpenSUSE)

### Apache NetBeans packaging

Apache NetBeans binary zip

### Anything else

If anyone can tell me how to debug this, I am glad to pull request to fix it.

### Are you willing to submit a pull request?

Yes

Reproduce the issue in Apache NetBeans 24 with a Java Maven, Gradle, or Ant project by hovering over a class, then compare the result with Ctrl+Space. Start by tracing the editor's hover and Javadoc display behavior; done means Javadoc appears automatically on hover across the reported environments without requiring Ctrl+Space.

Written by the indexing model from the issue text.