Framework wiring for the React v7 UI Kit across Vite, Create React App, Next.js, React Router (incl. Remix), and Astro — provider placement, env vars, routing, SSR/islands and build pitfalls. Triggers: 'cometchat with vite', 'cometchat in next.js', 'cometchat in react router', 'cometchat in remix', 'cometchat in astro', 'env vars not working', 'cometchat provider setup', 'SSR window is not defined'.
