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feat(pos): add real thermal ticket printing via ESC/POS (#21)

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- Add thermal_printer.py service generating raw ESC/POS bytes for 58mm/80mm printers
- Add /pos/api/sales/<id>/print endpoint (escpos_raw or browser mode)
- Add printer.js with WebUSB and Web Serial support for direct browser-to-printer
- Add thermal print button in ticket modal with connect/print workflow

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
consultoria-as
2026-04-04 08:16:44 +00:00
parent f9589f4a4e
commit ecdc3526a6
5 changed files with 413 additions and 1 deletions
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4
pos/templates/pos.html
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@@ -1380,6 +1380,8 @@
</div>
<div class="modal-footer">
<button class="btn btn-ghost" onclick="POS.closeTicketModal()">Cerrar</button>
<button class="btn btn-ghost" id="btnConnectPrinter" onclick="POS.connectThermal()" title="Conectar impresora termica USB/Serial">&#x1F5A8; Conectar</button>
<button class="btn btn-secondary" id="btnThermalPrint" onclick="POS.thermalPrint()" style="display:none;" title="Imprimir en impresora termica">&#x1F5A8; Termica</button>
<button class="btn btn-primary" onclick="POS.printTicket()">Imprimir</button>
</div>
</div>
@@ -1477,8 +1479,10 @@
<!-- ================================================================
JAVASCRIPT
================================================================ -->
<script src="/pos/static/js/i18n.js"></script>
<script src="/pos/static/js/app-init.js"></script>
<script src="/pos/static/js/push.js"></script>
<script src="/pos/static/js/printer.js"></script>
<script src="/pos/static/js/pos.js"></script>
<script>