- Add time format utilities to date.ts (applyTimeFormat, formatDateTime,
formatTimeOnly, TimeFormat type)
- PrintersPage: Pass timeFormat to formatETA for printer card ETA display
- ArchivesPage: Add timeFormat prop to ArchiveCard for archive timestamps
- AMSHistoryModal: Apply timeFormat to chart labels, axis ticks, and tooltip
- ProjectDetailPage: Use formatDateTime for timeline dates
- QueuePage: Pass timeFormat to formatRelativeTime for scheduled prints
- SystemInfoPage: Use formatDateTime for boot time display
- NotificationLogViewer: Apply timeFormat to notification timestamps
- Bump service worker cache version to v17
Closes#75
Problem: The backend stores timestamps in UTC, but when sending them to the frontend without timezone indicators, JavaScript interprets them inconsistently. Users saw UTC times displayed directly instead of converted to their local timezone (e.g., America/New_York).
Solution implemented:
1. Created /frontend/src/utils/date.ts with utilities:
- parseUTCDate(dateStr) - Parses backend timestamps as UTC by appending 'Z' to strings without timezone indicators
- formatDate(dateStr, options) - Formats UTC timestamps to local date/time
- formatDateOnly(dateStr, options) - Formats UTC timestamps to local date-only
2. Updated 15 frontend files to use the new utilities:
- ArchivesPage.tsx - Archive cards and list view dates
- PrintersPage.tsx - Last print date
- SettingsPage.tsx - API key last used date
- QueuePage.tsx - Scheduled print times
- ProjectDetailPage.tsx - Due dates and timeline
- ProfilesPage.tsx - Relative time display
- CalendarView.tsx - Calendar grouping by local date
- NotificationLogViewer.tsx - Log timestamps
- NotificationProviderCard.tsx - Last success date
- AMSHistoryModal.tsx - Chart data timestamps
- FilamentTrends.tsx - Usage data grouping
- PrinterQueueWidget.tsx - Queue item dates
maziggy