fix: define process.env variables in atoms vite config to prevent 'process is undefined' errors (calcom#24665)

- Add all process.env variables used by Next.js code to the define section
- This ensures they are replaced at build time and don't cause runtime errors in Vite projects
- Fixes calcom#24213

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

Author: ibex088

packages/platform/atoms/vite.config.ts

@@ -38,6 +38,14 @@ export default defineConfig(({ mode }) => {
     ],
     define: {
       "process.env.NEXT_PUBLIC_WEBAPP_URL": `"${webAppUrl}"`,
+      "process.env.NODE_ENV": `"${mode}"`,
+      "process.env.NEXT_PUBLIC_VERCEL_GIT_COMMIT_SHA": `"${env.NEXT_PUBLIC_VERCEL_GIT_COMMIT_SHA ?? ""}"`,
+      "process.env.NEXT_PUBLIC_CALCOM_VERSION": `"${env.NEXT_PUBLIC_CALCOM_VERSION ?? ""}"`,
+      "process.env.__NEXT_ROUTER_BASEPATH": `""`,
+      "process.env.__NEXT_I18N_SUPPORT": `false`,
+      "process.env.__NEXT_MANUAL_TRAILING_SLASH": `false`,
+      "process.env.__NEXT_TRAILING_SLASH": `false`,
+      "process.env": "{}",
     },
     ssr: {
       noExternal: ["turndown"], // Example if you want to disable SSR for your library