Initial scaffold: AI Tycoon monorepo with core game loop

Turborepo monorepo with three packages:
- packages/shared: TypeScript types for all 14 game systems + balance constants + formatting utils
- packages/game-engine: Pure TS simulation engine with tick processor, economy, infrastructure, compute, research, market, and reputation systems
- apps/web: React + Vite + Tailwind + Zustand frontend with sidebar dashboard layout, new game screen, dashboard with charts, infrastructure management, and model training pages

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/web/tailwind.config.ts

@@ -0,0 +1,37 @@
+import type { Config } from 'tailwindcss';
+
+export default {
+  content: ['./index.html', './src/**/*.{ts,tsx}'],
+  theme: {
+    extend: {
+      colors: {
+        surface: {
+          50: '#f8fafc',
+          100: '#f1f5f9',
+          200: '#e2e8f0',
+          300: '#cbd5e1',
+          400: '#94a3b8',
+          500: '#64748b',
+          600: '#475569',
+          700: '#334155',
+          800: '#1e293b',
+          900: '#0f172a',
+          950: '#020617',
+        },
+        accent: {
+          DEFAULT: '#6366f1',
+          light: '#818cf8',
+          dark: '#4f46e5',
+        },
+        success: '#22c55e',
+        warning: '#f59e0b',
+        danger: '#ef4444',
+      },
+      fontFamily: {
+        sans: ['Inter', 'system-ui', 'sans-serif'],
+        mono: ['JetBrains Mono', 'monospace'],
+      },
+    },
+  },
+  plugins: [],
+} satisfies Config;