fix(web): adapt build tooling

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

packages/web/playwright.config.ts

@@ -27,7 +27,7 @@ export default defineConfig({
   ],
 
   webServer: {
-    command: "next build && next start",
+    command: "bun --bun next build && bun --bun next start",
     url: "http://127.0.0.1:3000",
     reuseExistingServer: !process.env.CI,
     timeout: 180000,