feat(loader): quests.yaml loading + startQuest effect mapping

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

Semesterprojekt/src/test/java/thb/jeanluc/adventure/loader/QuestLoadingTest.java

@@ -0,0 +1,38 @@
+package thb.jeanluc.adventure.loader;
+
+import org.junit.jupiter.api.Test;
+import thb.jeanluc.adventure.loader.dto.ConditionDto;
+import thb.jeanluc.adventure.loader.dto.EffectDto;
+import thb.jeanluc.adventure.loader.dto.QuestDto;
+import thb.jeanluc.adventure.loader.dto.QuestStageDto;
+import thb.jeanluc.adventure.model.Effect;
+import thb.jeanluc.adventure.model.Quest;
+
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class QuestLoadingTest {
+    @Test
+    void factoryMapsStagesConditionsAndEffects() {
+        QuestDto dto = new QuestDto("q", "Title", true,
+                List.of(new QuestStageDto("obj",
+                        List.of(new ConditionDto("power_on", null, null)),
+                        List.of(new EffectDto("done", null, null, null, null)))),
+                List.of());
+
+        Quest q = QuestFactory.fromDto(dto);
+
+        assertThat(q.autoStart()).isTrue();
+        assertThat(q.stages()).hasSize(1);
+        assertThat(q.stages().getFirst().objective()).isEqualTo("obj");
+        assertThat(q.stages().getFirst().completion()).hasSize(1);
+        assertThat(q.stages().getFirst().onComplete().getFirst().type()).isEqualTo(Effect.Type.SET_FLAG);
+    }
+
+    @Test
+    void startQuestEffectMaps() {
+        assertThat(new EffectDto(null, null, null, null, null, "q").toModel().type())
+                .isEqualTo(Effect.Type.START_QUEST);
+    }
+}