Fix sidebar nav so Dashboard/Monitoring and Audit Trail/System Logs
highlight independently by using useSearchParams to distinguish
query-param-based routes. Fix get_jobs_over_time SQL GroupingError
by using literal_column for date_trunc interval. Add date filters to
status_breakdown query and fix Decimal serialization in locale stats.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>