Four autoUpdater event handlers (checking-for-update, update-available, update-not-available, update-downloaded) were logging via raw console.log while the sibling 'error' handler already used appendDebugLog. Two consequences:
1. In a packaged build the user has no visible record of the update lifecycle — console.log streams to stderr which is invisible without DevTools. appendDebugLog writes to the timestamped debug log file that the user can inspect via the Live Debug-Log card in Settings.
2. Inconsistent — the existing 'auto-updater-error' tag in line 6479 was the only update-related event reaching the debug log. New tags ('auto-updater-checking', 'auto-updater-update-available', 'auto-updater-update-not-available', 'auto-updater-update-downloaded') give the full lifecycle a coherent grep-friendly prefix in the log.
The version info that was being printed inline ("Update available: 4.7.0") now lives in the structured details payload instead of a free-form message — easier to parse mechanically and matches the rest of the codebase's debug-log conventions.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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