Cleaning up and adding comments

Exam/IKT203Exam/Portfolio/SharedLib/TStack.h

@@ -10,8 +10,13 @@ enum EnumActionType {
     DELETE
 };
 
+// Simple fixed-size stack used for undo/redo.
+// Stores actions describing line insert/delete operations.
 class TStack {
 private:
+    // Describes a single text-edit action.
+    // 'action' indicates INSERT or DELETE,
+    // 'text' stores the affected line, and 'index' is the line position.
     struct TAction {
         EnumActionType action;
         std::string text;
@@ -24,9 +29,8 @@ private:
 public:
     TStack() = default;
     ~TStack() = default;
-
-    void Push(const TAction& action);
-    TAction Pop();
+    void Push(const TAction& action);       // Adds a new action to the top of the stack.
+    TAction Pop();                          // Removes and returns the most recent action.
     [[nodiscard]] TAction Peek() const;
     [[nodiscard]] bool IsEmpty() const;
     void Clear();