feat: add smoke tests, agent credit ledger, and player cashback page

Introduce admin smoke-test suite with API probes, agent credit transaction history, and player cashback records; fix SmokeTestModule DI and polish admin/player UI assets.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/admin/src/vite-env.d.ts

@@ -1,3 +1,5 @@
+/// <reference types="vite/client" />
+
 declare module '*.vue' {
   import type { DefineComponent } from 'vue';
   const component: DefineComponent<object, object, unknown>;