feat: Enhance reservation functionality

vitest.integration.config.ts

@@ -1,15 +1,20 @@
 import { defineConfig } from 'vitest/config'
+import { loadEnv } from 'vite'
 
-export default defineConfig({
-  test: {
-    environment: 'node',
-    include: ['tests/integration/**/*.test.ts'],
-    testTimeout: 30000,
-    typecheck: { tsconfig: './tests/tsconfig.json' },
-  },
-  resolve: {
-    alias: {
-      '~': new URL('./app', import.meta.url).pathname,
+export default defineConfig(({ mode }) => {
+  const env = loadEnv(mode ?? 'test', process.cwd(), '')
+  return {
+    test: {
+      environment: 'node',
+      include: ['tests/integration/**/*.test.ts'],
+      testTimeout: 30000,
+      typecheck: { tsconfig: './tests/tsconfig.json' },
+      env,
     },
-  },
+    resolve: {
+      alias: {
+        '~': new URL('./app', import.meta.url).pathname,
+      },
+    },
+  }
 })