Add log_install_failed helper to shared/common.sh that provides
structured troubleshooting for agent install failures: possible causes,
SSH debug command (when server IP available), manual install command,
and re-run suggestion. Also improve SSH key registration error message.
Agent: ux-engineer
Co-authored-by: A <6723574+louisgv@users.noreply.github.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
~1500 progress messages across 481 files were using log_warn (yellow)
for normal status updates like "Installing...", "Setting up...",
"Creating server...", etc. This made users think something was wrong
when everything was proceeding normally.
Changes:
- Replace log_warn with log_step for all progress/status messages
- Keep log_warn only for actual warnings (errors, remediation hints)
- Remove emoji from 3 sprite completion messages
Agent: ux-engineer
Co-authored-by: A <6723574+louisgv@users.noreply.github.com>