QuickandClaude Opus 4.8
8b82906c7b
Clearing a previously-set air timezone sent JSON null, which decodes to a nil *string that UpdateMetadata treats as "skip this column", so the old value remained. The dialog now sends "" (accepted by ValidateAirTimezone), and UpdateMetadata maps air_timezone through NULLIF so an empty value persists as SQL NULL (matching the nullable column) rather than "". Addresses PR #21 review (P2). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>