Add prayer times, long-press edit, dashboard toggle, CI/CD, and test suite

[danialkhilji]

Summary

• Prayer times from Aladhan API with Moonsighting/Hanafi settings tuned to match Masjid-e-Salaam Preston
• Islamic (Hijri) calendar date displayed in the header
• Pull-to-refresh on dashboard for weather and prayer times
• Long-press edit on tasks, shopping items, notes, and members
• Task and shopping item toggle directly from dashboard cards
• Press animations on all interactive elements
• 64 backend tests (up from 49) covering all endpoints and cross-module flows
• GitHub Actions CI pipeline running pytest, tsc, and build on push/PR
• Pre-push git hook running all checks locally before push
• Database backup script with 7-day retention and cron scheduling
• Auto-start after reboot instructions
• Docker production config with health checks, gzip, and memory limits

Test plan

• All 64 backend tests passing
• Frontend TypeScript compiles with zero errors
• Frontend production build succeeds
• Prayer times display correctly on dashboard
• Long-press edit works on all modules
• Dashboard toggle works for tasks and shopping