chore(release): bump version to v2026.4.604 and update changelog}
- Bump package version from v2026.4.602 to v2026.4.604
- Update p3x-redis-ui-material dependency from ^2026.4.373 to ^2026.4.375
- Update p3x-redis-ui-server dependency from ^2026.4.321 to ^2026.4.322
- Fix Electron frontend path for Angular: use /ng/ instead of / to match the correct route
- Update build version references across README, changelogs, and artifact docs
- Refresh yarn.lock with updated dependency resolutions