Rename AI Tycoon to Token Empire across entire codebase

Full rebrand: UI display text, package scope (@ai-tycoon/* -> @token-empire/*),
localStorage keys, Docker/CI image paths, database names, and documentation.

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

package.json

@@ -1,5 +1,5 @@
 {
-  "name": "ai-tycoon",
+  "name": "token-empire",
   "private": true,
   "scripts": {
     "dev": "turbo dev",
@@ -9,8 +9,8 @@
     "test": "vitest run",
     "test:watch": "vitest",
     "clean": "turbo clean",
-    "simulate": "turbo simulate --filter=@ai-tycoon/game-simulation",
-    "simulate:ci": "pnpm --filter @ai-tycoon/game-simulation simulate:ci"
+    "simulate": "turbo simulate --filter=@token-empire/game-simulation",
+    "simulate:ci": "pnpm --filter @token-empire/game-simulation simulate:ci"
   },
   "devDependencies": {
     "turbo": "^2.5.0",