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>

config/items.js

@@ -0,0 +1,87 @@
+// 物品配置
+export const ITEM_CONFIG = {
+  // 武器
+  wooden_stick: {
+    id: 'wooden_stick',
+    name: '木棍',
+    type: 'weapon',
+    subtype: 'one_handed',
+    icon: '🪵',
+    baseValue: 10,  // 基础价值(铜币)
+    baseDamage: 5,
+    attackSpeed: 1.0,
+    quality: 100,  // 默认品质
+    unlockSkill: 'stick_mastery',
+    description: '一根粗糙的木棍，至少比空手强。'
+  },
+
+  // 消耗品
+  bread: {
+    id: 'bread',
+    name: '面包',
+    type: 'consumable',
+    subtype: 'food',
+    icon: '🍞',
+    baseValue: 10,
+    effect: {
+      stamina: 20
+    },
+    description: '普通的面包，可以恢复耐力。',
+    stackable: true,
+    maxStack: 99
+  },
+
+  healing_herb: {
+    id: 'healing_herb',
+    name: '草药',
+    type: 'consumable',
+    subtype: 'medicine',
+    icon: '🌿',
+    baseValue: 15,
+    effect: {
+      health: 15
+    },
+    description: '常见的治疗草药，可以恢复生命值。',
+    stackable: true,
+    maxStack: 99
+  },
+
+  // 书籍
+  old_book: {
+    id: 'old_book',
+    name: '破旧书籍',
+    type: 'book',
+    icon: '📖',
+    baseValue: 50,
+    readingTime: 60,  // 秒
+    expReward: {
+      reading: 10
+    },
+    completionBonus: null,
+    description: '一本破旧的书籍，记录着一些基础知识。',
+    consumable: false  // 书籍不消耗
+  },
+
+  // 素材
+  dog_skin: {
+    id: 'dog_skin',
+    name: '狗皮',
+    type: 'material',
+    icon: '🐕',
+    baseValue: 5,
+    description: '野狗的皮毛，可以用来制作简单装备。',
+    stackable: true,
+    maxStack: 99
+  },
+
+  // 关键道具
+  basement_key: {
+    id: 'basement_key',
+    name: '地下室钥匙',
+    type: 'key',
+    icon: '🔑',
+    baseValue: 0,
+    description: '一把生锈的钥匙，上面刻着「B」字母。',
+    stackable: false
+  }
+}