[FIX] point_of_sale: timezoned sales details

When printing the sales details of the day in the point of sale interface,
The orders printed were the orders of the UTC day, not the orders
of the day within the user timezone.

opw-745273

addons/point_of_sale/models/pos_order.py

@@ -5,6 +5,7 @@ from datetime import timedelta
 from functools import partial
 
 import psycopg2
+import pytz
 
 from odoo import api, fields, models, tools, _
 from odoo.tools import float_is_zero
@@ -907,7 +908,9 @@ class ReportSaleDetails(models.AbstractModel):
         if not configs:
             configs = self.env['pos.config'].search([])
 
-        today = fields.Datetime.from_string(fields.Date.context_today(self))
+        user_tz = pytz.timezone(self.env.context.get('tz') or self.env.user.tz or 'UTC')
+        today = user_tz.localize(fields.Datetime.from_string(fields.Date.context_today(self)))
+        today = today.astimezone(pytz.timezone('UTC'))
         if date_start:
             date_start = fields.Datetime.from_string(date_start)
         else: