semesterprojekt: implement full text adventure (phases 1-7)

Walking skeleton through Swing GUI: YAML-driven world (4 rooms,
4 items, 1 NPC), HashMap command dispatch with parser, three-tier
item hierarchy (readable / switchable / plain), and end-to-end
NPC give/receive flow. 67 tests green.

Semesterprojekt/src/main/java/thb/jeanluc/adventure/AppGui.java

@@ -0,0 +1,40 @@
+package thb.jeanluc.adventure;
+
+import lombok.extern.slf4j.Slf4j;
+import thb.jeanluc.adventure.io.SwingIO;
+
+import javax.swing.SwingUtilities;
+
+/**
+ * Entry point for the Swing version of the game. The Swing window is
+ * built on the Event Dispatch Thread; the game loop itself runs in a
+ * background worker so that EDT events (typing) and blocking
+ * {@code readLine()} calls never deadlock each other.
+ */
+@Slf4j
+public final class AppGui {
+
+    private AppGui() {
+    }
+
+    /**
+     * Standard JVM entry point.
+     *
+     * @param args ignored
+     */
+    public static void main(String[] args) {
+        SwingUtilities.invokeLater(() -> {
+            SwingIO io = new SwingIO("Haunted Manor");
+            Thread worker = new Thread(() -> {
+                try {
+                    App.run(io);
+                } catch (RuntimeException e) {
+                    log.error("Fatal error during game startup", e);
+                    io.write("Fatal error: " + e.getMessage());
+                }
+            }, "game-loop");
+            worker.setDaemon(true);
+            worker.start();
+        });
+    }
+}