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>

jest.config.js

@@ -0,0 +1,17 @@
+export default {
+  testEnvironment: 'node',
+  transform: {},
+  moduleNameMapper: {
+    '^@/(.*)$': '<rootDir>/$1',
+    '^@/components$': '<rootDir>/components',
+    '^@/config$': '<rootDir>/config',
+    '^@/store$': '<rootDir>/store',
+    '^@/utils$': '<rootDir>/utils'
+  },
+  testMatch: ['**/tests/**/*.{spec,test}.{js,mjs}'],
+  collectCoverageFrom: [
+    'store/**/*.js',
+    'utils/**/*.js',
+    '!**/node_modules/**'
+  ]
+}