bonamin 607e78ea82 feat: printer beep support for kitchen tickets ...

Adds configurable buzzer control so the printer alerts kitchen staff
on each new ticket print.

Backend:
  - printer_service.py: ESC 0x07 beep command fired before paper cut,
    reads print.beep_on_ticket / print.beep_pattern settings; supports
    single/double/triple/long presets and a custom:n1:n2:n3 format
  - settings.py: registers the two new print.beep_* settings with
    defaults (beep_on_ticket=true, beep_pattern=double)
  - system.py: POST /api/system/printers/test-beep endpoint for
    live testing from the dashboard

Frontend (PrintFontsTab):
  - BeepSection component with preset grid, custom n1/n2/n3 inputs,
    and a live test-beep button targeting any configured printer

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-05-31 23:53:58 +03:00

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