fix(playwright): use npm run to start the server on default port

Author: zetaraku

template/config/playwright/playwright.config.js

@@ -103,8 +103,8 @@ export default defineConfig({
      * Use the preview server on CI for more realistic testing.
      * Playwright will re-use the local server if there is already a dev-server running.
      */
-    command: process.env.CI ? 'vite preview --port 5173' : 'vite dev',
-    port: 5173,
+    command: process.env.CI ? 'npm run preview' : 'npm run dev',
+    port: process.env.CI ? 4173 : 5173,
     reuseExistingServer: !process.env.CI
   }
 })