- Add `CLOUDFLARE_STREAM_NIKIV_VIDEO_ID` to environment variables
- Refactor `$username.tsx` to initialize stream data with default HLS URL
- Implement dynamic HLS URL update based on API response for Nikiv stream
- Modify `/api/check-hls` route to use environment variable for video ID
- Ensure HLS URL updates trigger stream data refresh in client
- Update `wrangler.jsonc` to include `CLOUDFLARE_STREAM_NIKIV_VIDEO_ID` in env vars