feat: 초기 커밋

- Progress Quest 6.4 Flutter 포팅 프로젝트
- 게임 루프, 상태 관리, UI 구현
- 캐릭터 생성, 인벤토리, 장비, 주문 시스템
- 시장/판매/구매 메커니즘

test/core/engine/progress_service_test.dart

@@ -0,0 +1,158 @@
+import 'package:askiineverdie/src/core/engine/game_mutations.dart';
+import 'package:askiineverdie/src/core/engine/progress_service.dart';
+import 'package:askiineverdie/src/core/engine/reward_service.dart';
+import 'package:askiineverdie/src/core/model/game_state.dart';
+import 'package:askiineverdie/src/core/model/pq_config.dart';
+import 'package:askiineverdie/src/core/util/pq_logic.dart' as pq_logic;
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  late ProgressService service;
+  late PqConfig config;
+
+  setUp(() {
+    config = const PqConfig();
+    final mutations = GameMutations(config);
+    service = ProgressService(
+      config: config,
+      mutations: mutations,
+      rewards: RewardService(mutations),
+    );
+  });
+
+  test('tick advances task bar and recalculates encumbrance', () {
+    final state = GameState.withSeed(
+      seed: 42,
+      stats: const Stats(
+        str: 5,
+        con: 0,
+        dex: 0,
+        intelligence: 0,
+        wis: 0,
+        cha: 0,
+        hpMax: 0,
+        mpMax: 0,
+      ),
+      inventory: const Inventory(
+        gold: 5,
+        items: [
+          InventoryEntry(name: 'Rock', count: 3),
+        ],
+      ),
+      progress: const ProgressState(
+        task: ProgressBarState(position: 0, max: 80),
+        quest: ProgressBarState(position: 0, max: 10),
+        plot: ProgressBarState(position: 0, max: 10),
+        exp: ProgressBarState(position: 0, max: 50),
+        encumbrance: ProgressBarState(position: 0, max: 0),
+        currentTask: TaskInfo(caption: 'Test', type: TaskType.kill),
+        plotStageCount: 1,
+        questCount: 0,
+      ),
+    );
+
+    final result = service.tick(state, 150);
+
+    expect(result.leveledUp, isFalse);
+    expect(result.completedQuest, isFalse);
+    expect(result.completedAct, isFalse);
+    expect(result.state.progress.task.position, 80);
+    expect(result.state.progress.task.max, 80);
+    expect(result.state.progress.encumbrance.position, 3);
+    expect(result.state.progress.encumbrance.max, 15);
+    expect(result.state.progress.currentTask.caption, 'Test');
+  });
+
+  test('tick levels up when EXP is full during kill task', () {
+    final initial = GameState.withSeed(
+      seed: 7,
+      traits: const Traits(
+        name: 'Hero',
+        race: 'Human',
+        klass: 'Fighter',
+        level: 1,
+        motto: '',
+        guild: '',
+      ),
+      stats: const Stats(
+        str: 10,
+        con: 9,
+        dex: 8,
+        intelligence: 7,
+        wis: 6,
+        cha: 5,
+        hpMax: 10,
+        mpMax: 11,
+      ),
+      progress: const ProgressState(
+        task: ProgressBarState(position: 1000, max: 1000),
+        quest: ProgressBarState(position: 0, max: 10),
+        plot: ProgressBarState(position: 0, max: 10),
+        exp: ProgressBarState(position: 5, max: 5),
+        encumbrance: ProgressBarState(position: 0, max: 0),
+        currentTask: TaskInfo(caption: 'Battle', type: TaskType.kill),
+        plotStageCount: 1,
+        questCount: 0,
+      ),
+    );
+
+    final result = service.tick(initial, 50);
+
+    expect(result.leveledUp, isTrue);
+    expect(result.shouldAutosave, isTrue);
+    expect(result.state.traits.level, 2);
+    expect(result.state.stats.hpMax, greaterThan(initial.stats.hpMax));
+    expect(result.state.stats.mpMax, greaterThan(initial.stats.mpMax));
+    expect(result.state.progress.exp.position, 0);
+    expect(result.state.progress.exp.max, pq_logic.levelUpTime(2));
+    // 태스크 완료 후 새 태스크가 자동으로 시작됨
+    expect(result.state.progress.task.position, 0);
+    expect(result.state.progress.task.max, greaterThan(0));
+  });
+
+  test('quest completion enqueues next task and resets quest bar', () {
+    final initial = GameState.withSeed(
+      seed: 99,
+      traits: const Traits(
+        name: 'Questor',
+        race: 'Elf',
+        klass: 'Mage',
+        level: 3,
+        motto: '',
+        guild: '',
+      ),
+      stats: const Stats(
+        str: 4,
+        con: 5,
+        dex: 6,
+        intelligence: 7,
+        wis: 8,
+        cha: 9,
+        hpMax: 12,
+        mpMax: 10,
+      ),
+      progress: const ProgressState(
+        task: ProgressBarState(position: 2000, max: 2000),
+        quest: ProgressBarState(position: 4, max: 5),
+        plot: ProgressBarState(position: 0, max: 20),
+        exp: ProgressBarState(position: 0, max: 30),
+        encumbrance: ProgressBarState(position: 0, max: 0),
+        currentTask: TaskInfo(caption: 'Hunt', type: TaskType.kill),
+        plotStageCount: 2,
+        questCount: 1,
+      ),
+      queue: QueueState(entries: const []),
+    );
+
+    final result = service.tick(initial, 50);
+    final nextState = result.state;
+
+    expect(result.completedQuest, isTrue);
+    expect(nextState.progress.questCount, 2);
+    expect(nextState.progress.quest.position, 0);
+    expect(nextState.progress.quest.max, inInclusiveRange(50, 149));
+    expect(nextState.progress.currentTask.type, TaskType.neutral);
+    expect(nextState.progress.task.position, 0);
+    expect(nextState.queue.entries, isEmpty);
+  });
+}