feat: condition-locked exits (+ room/dialogue state plumbing)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Semesterprojekt/src/test/java/thb/jeanluc/adventure/command/impl/LockedExitTest.java

@@ -0,0 +1,37 @@
+package thb.jeanluc.adventure.command.impl;
+
+import org.junit.jupiter.api.Test;
+import thb.jeanluc.adventure.game.GameContext;
+import thb.jeanluc.adventure.io.TestIO;
+import thb.jeanluc.adventure.model.Condition;
+import thb.jeanluc.adventure.model.Direction;
+import thb.jeanluc.adventure.model.ExitLock;
+import thb.jeanluc.adventure.model.Player;
+import thb.jeanluc.adventure.model.Room;
+
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class LockedExitTest {
+    @Test
+    void lockedExitBlocksUntilFlagSet() {
+        Room kitchen = new Room("kitchen", "Kitchen", "d");
+        Room cellar = new Room("cellar", "Cellar", "d");
+        kitchen.addExit(Direction.EAST, cellar);
+        kitchen.addExitLock(Direction.EAST, new ExitLock(
+                List.of(new Condition(Condition.Type.FLAG, "power_on")),
+                "The cellar door is sealed."));
+        Player player = new Player(kitchen, 0);
+        TestIO io = new TestIO();
+        GameContext ctx = new GameContext(null, player, io);
+
+        new GoCommand().execute(ctx, List.of("east"));
+        assertThat(player.getCurrentRoom()).isEqualTo(kitchen);
+        assertThat(io.allOutput()).contains("sealed");
+
+        ctx.getState().set("power_on");
+        new GoCommand().execute(ctx, List.of("east"));
+        assertThat(player.getCurrentRoom()).isEqualTo(cellar);
+    }
+}