feat: Adding simple portifolio and transactions list

src/main/java/millions/view/GameView.java

@@ -39,6 +39,8 @@ public class GameView extends BorderPane implements PlayerListener, ExchangeList
 
   private final TextField searchField = new TextField();
   private final ListView<Stock> stocksList = new ListView<>();
+  private final ListView<String> portfolioList = new ListView<>();
+  private final ListView<String> transactionsList = new ListView<>();
   private final Label selectedStockLabel = new Label("Select a stock to see chart");
   private final Label ownedQuantityLabel = new Label("Owned: 0");
   private final Label actionStatusLabel = new Label();
@@ -76,8 +78,8 @@ private TabPane createTabs() {
     TabPane tabPane = new TabPane();
     tabPane.setTabClosingPolicy(TabPane.TabClosingPolicy.UNAVAILABLE);
     tabPane.getTabs().add(createStocksTab());
-    tabPane.getTabs().add(new Tab("Portfolio", new VBox()));
-    tabPane.getTabs().add(new Tab("Transactions", new VBox()));
+    tabPane.getTabs().add(createPortfolioTab());
+    tabPane.getTabs().add(createTransactionsTab());
     return tabPane;
   }
 
@@ -124,6 +126,16 @@ private Tab createStocksTab() {
     return new Tab("Stocks", outer);
   }
 
+  private Tab createPortfolioTab() {
+    portfolioList.setPlaceholder(new Label("No shares yet"));
+    return new Tab("Portfolio", portfolioList);
+  }
+
+  private Tab createTransactionsTab() {
+    transactionsList.setPlaceholder(new Label("No transactions yet"));
+    return new Tab("Transactions", transactionsList);
+  }
+
   private void configureButtons() {
     buyButton.setOnAction(event -> buySelectedStock());
     sellButton.setOnAction(event -> sellSelectedShare());
@@ -163,6 +175,8 @@ protected void updateItem(Stock stock, boolean empty) {
   private void refreshAll() {
     refreshPlayerInfo();
     refreshStocks();
+    refreshPortfolio();
+    refreshTransactions();
   }
 
   private void refreshPlayerInfo() {
@@ -249,6 +263,31 @@ private void refreshQuantityControls(Stock stock) {
     }
   }
 
+  private void refreshPortfolio() {
+    Player player = controller.getPlayer();
+
+    portfolioList
+        .getItems()
+        .setAll(
+            player.getPortfolio().getShares().stream()
+                .map(ViewUtils::formatPortfolioShare)
+                .toList());
+  }
+
+  private void refreshTransactions() {
+    Player player = controller.getPlayer();
+    if (player == null) {
+      return;
+    }
+
+    transactionsList
+        .getItems()
+        .setAll(
+            player.getTransactionArchive().getTransactions().stream()
+                .map(ViewUtils::formatTransaction)
+                .toList());
+  }
+
   private void buySelectedStock() {
     Stock selectedStock = stocksList.getSelectionModel().getSelectedItem();
     if (selectedStock == null) {

src/main/java/millions/view/ViewUtils.java

@@ -5,6 +5,7 @@
 import javafx.scene.control.ListCell;
 import millions.model.Share;
 import millions.model.Stock;
+import millions.model.Transaction;
 
 /** Small utility helpers for view formatting and simple calculations. */
 public final class ViewUtils {
@@ -74,4 +75,22 @@ public static int clampQuantity(int quantity, int maxBuyable) {
     }
     return quantity;
   }
+
+  public static String formatPortfolioShare(Share share) {
+    return share.getStock().getSymbol()
+        + "|"
+        + share.getQuantity()
+        + "|"
+        + share.getPurchasePrice();
+  }
+
+  public static String formatTransaction(Transaction transaction) {
+    return transaction.getClass().getSimpleName()
+        + "|"
+        + transaction.getShare().getStock().getSymbol()
+        + "|"
+        + transaction.getShare().getQuantity()
+        + "|"
+        + transaction.getWeek();
+  }
 }