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>

docker-compose.yml

@@ -1,6 +1,6 @@
 services:
   web:
-    image: gitea.thewrightserver.net/josh/aihostingtycoon/web:latest
+    image: gitea.thewrightserver.net/josh/tokenempire/web:latest
     ports:
       - "80:80"
     depends_on:
@@ -8,11 +8,11 @@ services:
     restart: unless-stopped
 
   server:
-    image: gitea.thewrightserver.net/josh/aihostingtycoon/server:latest
+    image: gitea.thewrightserver.net/josh/tokenempire/server:latest
     ports:
       - "3001:3001"
     environment:
-      - DATABASE_URL=postgresql://aitycoon:aitycoon@db:5432/aitycoon
+      - DATABASE_URL=postgresql://tokenempire:tokenempire@db:5432/tokenempire
       - PORT=3001
       - CORS_ORIGIN=*
       - JWT_SECRET=change-me-to-a-random-secret
@@ -26,13 +26,13 @@ services:
   db:
     image: postgres:17-alpine
     environment:
-      - POSTGRES_USER=aitycoon
-      - POSTGRES_PASSWORD=aitycoon
-      - POSTGRES_DB=aitycoon
+      - POSTGRES_USER=tokenempire
+      - POSTGRES_PASSWORD=tokenempire
+      - POSTGRES_DB=tokenempire
     volumes:
       - pgdata:/var/lib/postgresql/data
     healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U aitycoon"]
+      test: ["CMD-SHELL", "pg_isready -U tokenempire"]
       interval: 5s
       timeout: 5s
       retries: 5