feat(items): add server field and improve item management

refactor(ai): enhance item structure generation with schema validation
feat(ai): add token usage tracking and cost calculation
fix(ui): improve item card number formatting with locale support
docs(items): add documentation for item value separation
test(items): add tests for value field validation

package.json

@@ -15,7 +15,8 @@
     "db:test": "tsx lib/db/test-connection.ts",
     "prisma:generate": "prisma generate --schema=prisma/schema.prisma",
     "prisma:studio": "prisma studio --schema=prisma/schema.prisma",
-    "postinstall": "prisma generate --schema=prisma/schema.prisma"
+    "postinstall": "prisma generate --schema=prisma/schema.prisma",
+    "test": "tsx tests/run-tests.ts"
   },
   "keywords": [
     "tibia marketplace",