Removing the Enabled else-if branch in a previous commit left the Soll if-block unclosed, crashing app.js at parse time so no JS ran at all. Also adds: onerror handler surfaces connection failures in the status label; try/catch for invalid URL; 'Connecting…' feedback; localhost fallback when location.hostname is empty (file:// open); wider host input field. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01DF16nV2ispNw1C9SbvqbRQ