- Add TIMEZONE config option (default: America/New_York)
- Set PHP default timezone from config
- Add timezone offset and abbreviation for JavaScript
- Update stat card filters to use server timezone
- Add timezone config to Dashboard and Ticket views
Timezone can be changed via TIMEZONE env variable.
All dates now consistent with server timezone (EST by default).
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>