Initial commit: Text Adventure Game

Features:
- Combat system with AP/EP hit calculation and three-layer defense
- Auto-combat/farming mode
- Item system with stacking support
- Skill system with levels, milestones, and parent skill sync
- Shop system with dynamic pricing
- Inventory management with bulk selling
- Event system
- Game loop with offline earnings
- Save/Load system

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

tests/fixtures/items.js

@@ -0,0 +1,144 @@
+/**
+ * 物品测试夹具
+ */
+
+/**
+ * 创建模拟武器
+ * @param {Object} overrides - 覆盖属性
+ * @returns {Object} 武器对象
+ */
+export function createMockWeapon(overrides = {}) {
+  return {
+    id: 'wooden_sword',
+    name: '木剑',
+    type: 'weapon',
+    subtype: 'one_handed',
+    baseDamage: 10,
+    baseDefense: 0,
+    baseShield: 0,
+    baseValue: 100,
+    quality: 100,
+    attackSpeed: 1.0,
+    uniqueId: `wooden_sword_${Date.now()}_test`,
+    count: 1,
+    equipped: false,
+    obtainedAt: Date.now(),
+    ...overrides
+  }
+}
+
+/**
+ * 创建模拟防具
+ * @param {Object} overrides - 覆盖属性
+ * @returns {Object} 防具对象
+ */
+export function createMockArmor(overrides = {}) {
+  return {
+    id: 'leather_armor',
+    name: '皮甲',
+    type: 'armor',
+    subtype: 'light',
+    baseDamage: 0,
+    baseDefense: 15,
+    baseShield: 0,
+    baseValue: 150,
+    quality: 100,
+    uniqueId: `leather_armor_${Date.now()}_test`,
+    count: 1,
+    equipped: false,
+    obtainedAt: Date.now(),
+    ...overrides
+  }
+}
+
+/**
+ * 创建模拟盾牌
+ * @param {Object} overrides - 覆盖属性
+ * @returns {Object} 盾牌对象
+ */
+export function createMockShield(overrides = {}) {
+  return {
+    id: 'wooden_shield',
+    name: '木盾',
+    type: 'shield',
+    baseDamage: 0,
+    baseDefense: 0,
+    baseShield: 20,
+    baseValue: 80,
+    quality: 100,
+    uniqueId: `wooden_shield_${Date.now()}_test`,
+    count: 1,
+    equipped: false,
+    obtainedAt: Date.now(),
+    ...overrides
+  }
+}
+
+/**
+ * 创建模拟消耗品
+ * @param {Object} overrides - 覆盖属性
+ * @returns {Object} 消耗品对象
+ */
+export function createMockConsumable(overrides = {}) {
+  return {
+    id: 'health_potion',
+    name: '生命药水',
+    type: 'consumable',
+    baseValue: 50,
+    quality: 100,
+    effect: {
+      health: 30,
+      stamina: 0,
+      sanity: 0
+    },
+    stackable: true,
+    maxStack: 99,
+    uniqueId: `health_potion_${Date.now()}_test`,
+    count: 1,
+    obtainedAt: Date.now(),
+    ...overrides
+  }
+}
+
+/**
+ * 创建模拟书籍
+ * @param {Object} overrides - 覆盖属性
+ * @returns {Object} 书籍对象
+ */
+export function createMockBook(overrides = {}) {
+  return {
+    id: 'skill_book_basics',
+    name: '技能基础',
+    type: 'book',
+    baseValue: 200,
+    quality: 100,
+    readingTime: 60,
+    expReward: {
+      sword: 50
+    },
+    completionBonus: {
+      intuition: 1
+    },
+    uniqueId: `skill_book_${Date.now()}_test`,
+    count: 1,
+    obtainedAt: Date.now(),
+    ...overrides
+  }
+}
+
+/**
+ * 创建高品质物品
+ * @param {string} type - 物品类型
+ * @param {number} quality - 品质值
+ * @returns {Object} 高品质物品
+ */
+export function createHighQualityItem(type, quality = 180) {
+  const itemCreators = {
+    weapon: createMockWeapon,
+    armor: createMockArmor,
+    shield: createMockShield
+  }
+
+  const creator = itemCreators[type] || createMockWeapon
+  return creator({ quality })
+}