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>

apps/web/src/App.tsx

@@ -6,7 +6,7 @@ import { OfflineCatchUp } from '@/components/game/OfflineCatchUp';
 import { InviteGateScreen } from '@/components/game/InviteGateScreen';
 import { useGameLoop } from '@/hooks/useGameLoop';
 import { useAuthGate } from '@/hooks/useAuthGate';
-import { TICK_INTERVAL_MS } from '@ai-tycoon/shared';
+import { TICK_INTERVAL_MS } from '@token-empire/shared';
 import { Sparkles, RefreshCw, WifiOff } from 'lucide-react';
 
 function LoadingScreen() {
@@ -16,7 +16,7 @@ function LoadingScreen() {
         <div className="inline-flex items-center gap-2 mb-4">
           <Sparkles className="text-accent-light animate-pulse" size={32} />
           <h1 className="text-4xl font-bold bg-gradient-to-r from-accent-light to-accent bg-clip-text text-transparent">
-            AI Tycoon
+            Token Empire
           </h1>
         </div>
         <p className="text-surface-500 text-sm">Loading...</p>
@@ -32,7 +32,7 @@ function BackendErrorScreen({ error, onRetry }: { error: string; onRetry: () =>
         <div className="inline-flex items-center gap-2 mb-6">
           <Sparkles className="text-accent-light" size={32} />
           <h1 className="text-4xl font-bold bg-gradient-to-r from-accent-light to-accent bg-clip-text text-transparent">
-            AI Tycoon
+            Token Empire
           </h1>
         </div>