build: 打通 FastAPI 与 Vue 最小工程、依赖与数据库连接

后端入口、配置、Redis 与 Alembic 迁移就位；前端 Vite 工程可安装可构建。

frontend/vitest.config.ts

@@ -0,0 +1,23 @@
+import { fileURLToPath } from 'node:url'
+import { defineConfig, configDefaults } from 'vitest/config'
+import vue from '@vitejs/plugin-vue'
+import vueJsx from '@vitejs/plugin-vue-jsx'
+
+export default defineConfig({
+  plugins: [vue(), vueJsx()],
+  resolve: {
+    alias: {
+      '@': fileURLToPath(new URL('./src', import.meta.url)),
+      // vite-plugin-pwa virtual module doesn't exist under vitest
+      'virtual:pwa-register': fileURLToPath(
+        new URL('./src/__tests__/stubs/pwa-register.ts', import.meta.url)
+      ),
+    },
+  },
+  test: {
+    environment: 'jsdom',
+    // Playwright specs (the enterprise suite lives under its module), not vitest.
+    exclude: [...configDefaults.exclude, 'e2e/**', 'src/modules/enterprise/e2e/**'],
+    root: fileURLToPath(new URL('./', import.meta.url)),
+  },
+})