[BUG] ActionEvent compared with == instead of .equals() in multiple files

[AmlanDalai]

Problem

Multiple files use reference equality (==) to compare ActionEvent
objects in doAction() methods:

• GuiPanel.java
• LearningPanel.java
• CreateOpenProjectGUI.java

Example from LearningPanel.java:
if (event == SAVE_BUTTON_PRESSED)
if (event == LOAD_BUTTON_PRESSED)

In Java, == checks reference identity not logical equality. This can
cause button actions to silently fail under certain JVM conditions
where a new ActionEvent instance is constructed rather than reusing
the same reference.

Additionally LearningPanel.java uses:
if (cname != "")
which is also unreliable string reference comparison — should be
!cname.isEmpty()