3bb2ef2759
Fix latent API bug where multi-word fields (RecurrenceDuration, ParentUUID, CreatedAt) serialized as PascalCase, breaking the frontend. Add explicit snake_case json tags and custom MarshalJSON/UnmarshalJSON on Task, Status, and APIKey to emit unix timestamps and string status codes. Add Urgency float64 as a derived field on Task, populated via PopulateUrgency helper in all handlers before serialization. The report engine's sortByUrgency now also retains the computed score. Frontend updated with urgency type, color-coded badge in TaskItem, and mock data values. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>